USACE / NAVFAC / AFCESA UFGS-33 71 01.00 40 (November 2008)
-----------------------------------
Preparing Activity: NASA Superseding
UFGS-26 26 00.00 40 (August 2008)
UFGS-33 71 39.13 40 (January 2007)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 33 71 01.00 40
OVERHEAD TRANSMISSION AND DISTRIBUTION
11/08
NOTE: This guide specification covers the requirements for overhead electrical
work and utility poles.
Edit this guide specification for project specific requirements by adding, deleting,
or revising text. For bracketed items, choose applicable items(s) or insert
appropriate information.
Remove information and requirements not required in respective project, whether
or not brackets are present.
Comments and suggestions on this guide specification are welcome. Direct them
to the technical proponent of the specification. A listing of technical proponents
, including their organization designation and telephone number, is on the Internet.
Submit recommended changes to a UFGS as a Criteria Change Request (CCR).
NOTE: This guide specification does not cover all possible methods or requirements
for providing overhead facilities. This produces an involved, confusing document.
This guide specification presents the usual methods and the most used alternatives.
Different materials and methods, properly specified, indicated, and economically
used are acceptable when approved by cognizant authority.
NOTE: TO DOWNLOAD UFGS GRAPHICS
Go to http://www.wbdg.org/ccb/NAVGRAPH/graphtoc.pdf.
NOTE: Do not include list of tables, or tables themselves, in project specifications.
Use table to obtain values required in Part 2 of the specification.
TABLE NUMBER TITLE
OH-1 Single-phase Pole-mounted Transformer Loss &
Impedance Data Cost (EC) Less Than or Equal to
$0.04 (2 pages)
OH-2 Single-phase Pole-mounted Transformer Loss &
Impedance Data Cost (EC) Greater Than $.04 and
Less Than or Equal to $0.08 (2 pages)
OH-3 Single-phase Pole-mounted Transformer Loss
& Impedance Data Cost (EC) Greater Than
$.08 and Less Than or Equal to $0.12 (2 pages)
EC-1 Energy costs at NAVFAC Atlantic Activities
(2 pages)
-----------------------------------------------------
NOTE: Show the following information on the drawings:
1. Conductor sizes, types, and materials.
2. Guy strand type, size, and length.
3. Primary fused cutout; give voltage rating and state fusing (ampere rating)
and "K" quick or "T" tardy required for coordination with existing upstream
sectionalizing equipment.
4. Pole top switch. State voltage, current, and other operating characteristics.
The applicable switch ratings are stated in IEEE C37.30.
5. Meter connections (can be determined from NEMA C12.10 or similar source).
6. Anchor type, description, and dimensions suitable for the ultimate load
and the specific soil at location.
7. Indicate ruling span (average span length plus 2/3 of the difference between
the longest and the average span).
8. Sag table(s) for the specific conductor, the ruling span(s) and the loading
zone.
9. The mechanical strength of crossarms, insulators, pins, guys and anchors
must be engineered for each job and the dimensions, materials, and other descriptions
covered by drawings. Strength requirements of IEEE C2 are minimum.
PART 1 GENERAL
1.1 REFERENCES
NOTE: This paragraph is used to list the publications cited in the text of
the guide specification. The publications are referred to in the text by basic
designation only and listed in this paragraph by organization, designation,
date, and title.
Use the Reference Wizard's Check Reference feature when you add a RID outside
of the Section's Reference Article to automatically place the reference in the
Reference Article. Also use the Reference Wizard's Check Reference feature
to update the issue dates.
References not used in the text will automatically be deleted from this section
of the project specification when you choose to reconcile references in the
publish print process.
The publications listed below form a part of this specification to the extent referenced. The publications are
referred to within the text by the basic designation only.
[ALLIANCE FOR TELECOMMUNICATIONS INDUSTRY SOLUTIONS (ATIS)ATIS O5.1(2008) Specifications and Dimensions (for Wood Poles)][AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)ANSI C12.7(2005) Requirements for Watthour Meter SocketsANSI C135.14(1979) Staples with Rolled or Slash Points for Overhead Line ConstructionANSI C135.30(1988) Zinc-Coated Ferrous Ground Rods for Overhead or Underground Line Construction][AMERICAN WOOD PROTECTION ASSOCIATION (AWPA)AWPA A3(2005) Standard Method for Determining Penetration of Preservatives and Fire RetardantsAWPA C1(2003) All Timber Products - Preservative Treatment by Pressure ProcessesAWPA C25(2003) Sawn Crossarms - Preservative Treatment by Pressure ProcessesAWPA C4(2003) Poles - Preservative Treatment by Pressure ProcessesAWPA T1(2004; R 2005) Use Category System: Processing and Treatment Standard][ASME INTERNATIONAL (ASME)ASME B16.11(2005) Forged Fittings, Socket-Welding and Threaded][ASTM INTERNATIONAL (ASTM)ASTM A 123/A 123M(2008) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel ProductsASTM A 153/A 153M(2005) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel HardwareASTM A 167(1999; R 2004) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and StripASTM A 36/A 36M(2008) Standard Specification for Carbon Structural SteelASTM A 475(2003) Standard Specification for Zinc-Coated Steel Wire StrandASTM A 53/A 53M(2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and SeamlessASTM A 575(1996; R 2007) Standard Specification for Steel Bars, Carbon, Merchant Quality, M-GradesASTM A 576(1990b; R 2006) Standard Specification for Steel Bars, Carbon, Hot-Wrought, Special QualityASTM B 1(2001; R 2007) Standard Specification for Hard-Drawn Copper WireASTM B 117(2007a) Standing Practice for Operating Salt Spray (Fog) ApparatusASTM B 2(2008) Standard Specification for Medium-Hard-Drawn Copper WireASTM B 230/B 230M(2007) Standard Specification for Aluminum 1350-H19 Wire for Electrical PurposesASTM B 231/B 231M(2004) Standard Specification for Concentric-Lay-Stranded Aluminum 1350 ConductorsASTM B 232/B 232M(2001e1) Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Reinforced (ACSR)ASTM B 3(2001; R 2007) Standard Specification for Soft or Annealed Copper WireASTM B 398/B 398M(2002; R 2007) Standard Specification for Aluminum-Alloy 6201-T81 Wire for Electrical PurposesASTM B 399/B 399M(2004) Standard Specification for Concentric-Lay-Stranded Aluminum-Alloy 6201-T81 ConductorsASTM B 8(2004) Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or SoftASTM D 117(2002) Standard Guide for Sampling, Test Methods, Specifications and Guide for Electrical Insulating Oils of Petroleum OriginASTM D 1625(1971; R 2000) Standard Specifications for Chromated Copper ArsenateASTM D 1654(2008) Evaluation of Painted or Coated Specimens Subjected to Corrosive EnvironmentsASTM D 3487(2008) Standard Specification for Mineral Insulating Oil Used in Electrical ApparatusASTM D 709(2001; R 2007) Laminated Thermosetting MaterialsASTM D 877(2002; R 2007) Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk ElectrodesASTM D 92(2005a) Standard Test Method for Flash and Fire Points by Cleveland Open Cup TesterASTM D 97(2008) Pour Point of Petroleum Products][FM GLOBAL (FM)FM P7825(2005) Approval Guide][INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)IEEE C135.1(1999) Standard for Zinc-Coated Steel Bolts and Nuts for Overhead Line ConstructionIEEE C135.2(1999) Threaded Zinc-Coated Ferrous Strand-Eye Anchor Rods and Nuts for Overhead Line ConstructionIEEE C135.22(1988) Zinc-Coated Ferrous Pole-Top Insulator Pins with Lead Threads for Overhead Line ConstructionIEEE C2(2007; Errata 2007; INT 2008) National Electrical Safety CodeIEEE C37.32(2002) High-Voltage Switches, Bus Supports, and Accessories - Schedules of Preferred Ratings, Construction Guidelines and SpecificationsIEEE C37.41(2000) Design Tests for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and AccessoriesIEEE C37.42(1996) High Voltage Expulsion Type Distribution Class Fuses, Cutouts, Fuse Disconnecting Switches and Fuse Links**IEEE C37.63(2005) Requirements for Overhead, Pad-Mounted, Dry-Vault, and Submersible Automatic Line Sectionalizers for AC SystemsIEEE C57.12.00(2006) Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating TransformersIEEE C57.12.20(2005; INT 1-3 2008) Transformers -- Overhead Type Distribution Transformers, 500 KVA and Smaller: High Voltage 34 500 Volts and Below: Low Voltage, 7970/13 800 Y Volts and BelowIEEE C57.12.28(2005) Standard for Pad-Mounted Equipment - Enclosure IntegrityIEEE C57.12.90(2006) Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating TransformersIEEE C57.13(2008) Standard Requirements for Instrument TransformersIEEE C57.15(1999) Requirements, Terminology, and Test Code for Step-Voltage RegulatorsIEEE C62.11(2005; Amendment A 2008) Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1kV)IEEE Std 100(2000) The Authoritative Dictionary of IEEE Standards TermsIEEE Std 18(2002; INT 2005) Standard for Shunt Power CapacitorsIEEE Std 404(2006) Extruded and Laminated Dielectric Shielded Cable Joints Rated 2500 V Through 500 000 V][INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)NETA ATS(2003) Acceptance Testing Specifications][INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)IEC 62271-111(2005) High Voltage Switchgear And Controlgear Part 111: Overhead, Pad-Mounted, Dry Vault, And Submersible Automatic Circuit Reclosers And Fault Interrupters For Alternating Current Systems Up To 38 Kv][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA C12.1(2008) Electric Meters; Code for Electricity MeteringNEMA C12.10(2004) Physical Aspects of Watthour MetersNEMA C135.4(1987) Zinc-Coated Ferrous Eyebolts and Nuts for Overhead Line ConstructionNEMA C29.2(1992; R 1999) Standard for Insulators - Wet-Process Porcelain and Toughened Glass - Suspension TypeNEMA C29.3(1986; R 2002) Standard for Wet Process Porcelain Insulators - Spool TypeNEMA C29.4(1989; R 2002) Standard for Wet-Process Porcelain Insulators - Strain TypeNEMA C29.5(1984; R 2002) Wet-Process Porcelain Insulators (Low and Medium Voltage Pin Type)NEMA C29.7(1996; 2002) Standard for Wet Process Porcelain Insulators - High-Voltage Line Post TypeNEMA ICS 6(1993; R 2006) Standard for Industrial Controls and Systems EnclosuresNEMA WC 70(1999; Errata 2001) Standard for Non-Shielded Power Cable 2000 V or Less for the Distribution of Electrical EnergyNEMA WC 71(1999) Standard for Nonshielded Cables Rated 2001-5000 Volts for use in the Distribution of Electric EnergyNEMA WC 74(2006) Standard for 5-46 kV Shielded Power Cable for use in the Transmission and Distribution of Electric Energy][NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70(2007; AMD 1 2008) National Electrical Code - 2008 Edition][ORGANISATION FOR ECONOMIC CO-OPERATION AND DEVELOPMENT (OECD)OECD Test 203(1992) Fish Acute Toxicity Test][U.S. DEPARTMENT OF AGRICULTURE (USDA)RUS 202-1(2004) List of Materials Acceptable for Use on Systems of RUS Electrification BorrowersRUS Bull 1728H-701(1993) Wood Crossarms (Solid and Laminated), Transmission Timbers and Pole KeysRUS Bull 345-67(1998) REA Specification for Filled Telephone Cables, PE-39][U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA)EPA 600/4-90/027F(1993) Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine OrganismsEPA 712-C-98-075(1996) Fate, Transport and Transformation Test Guidelines - OPPTS 835.3100- "Aerobic Aquatic Biodegradation"][UNDERWRITERS LABORATORIES (UL)UL 467(2007) Standard for Grounding and Bonding EquipmentUL 486A-486B(2003; Rev thru Aug 2006) Standard for Wire ConnectorsUL 510(2005; Rev thru Aug 2005) Polyvinyl Chloride, Polyethylene, and Rubber Insulating TapeUL 6(2007) Standard for Electrical Rigid Metal Conduit-Steel]1.2 RELATED REQUIREMENTS
Section 26 08 00 APPARATUS INSPECTION AND TESTING applies to this section with additions and modifications specified
herein.
1.3 DEFINITIONS
Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on
the drawings, are as defined in IEEE Std 100.
1.4 SUBMITTALS
NOTE: Review Submittal Description (SD) definitions in Section 01 33 00 SUBMITTAL
PROCEDURES and edit the following list to reflect only the submittals required
for the project. Submittals should be kept to the minimum required for adequate
quality control.
A “G” following a submittal item indicates that the submittal requires Government
approval. Some submittals are already marked with a “G”. Only delete an existing
“G” if the submittal item is not complex and can be reviewed through the Contractor’s
Quality Control system. Only add a “G” if the submittal is sufficiently important
or complex in context of the project.
For submittals requiring Government approval on Army projects, a code of up
to three characters within the submittal tags may be used following the "G"
designation to indicate the approving authority. Codes for Army projects using
the Resident Management System (RMS) are: "AE" for Architect-Engineer; "DO"
for District Office (Engineering Division or other organization in the District
Office); "AO" for Area Office; "RO" for Resident Office; and "PO" for Project
Office. Codes following the "G" typically are not used for Navy, Air Force,
and NASA projects.
Choose the first bracketed item for Navy, Air Force and NASA projects, or choose
the second bracketed item for Army projects.
Government approval is required for submittals with a "G" designation; submittals not having a "G" designation
are [for Contractor Quality Control approval.][for information only. When used, a designation following the
"G" designation identifies the office that will review the submittal for the Government.] Submit the following
in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:
NOTE: Use the following paragraph and subparagraphs regarding transformer submittals
for NAVFAC projects. In the bracketed option, insert your appropriate NAVFAC
Component organization and code. For other projects, perform submittal review
by the designer of record; If submittal review by NAVFAC Atlantic is specifically
desired, the responsible Government agency must coordinate with NAVFAC Atlantic,
Code CIEE during the design process. Add appropriate information in Section
titled "Submittal Procedures" to coordinate with the special requirements.
[[Code [CIEE] [___], NAVFAC [Atlantic] [___] reviews and approves transformer submittals.] As an exception
to this paragraph, transformers manufactured by ABB in Athens, GA; by Cooper Power Systems in Lumberton, MS;
by ERMCO in Dyersburg, TN; or by Howard Industries in Laurel, MS need not meet the submittal requirements of
this contract. Instead, submit the following.
a. A certification, from the manufacturer, that the technical requirements of this specification
are met.
b. Provide routine and other tests (paragraph entitled "Routine and Other Tests), that are
conducted by the manufacturer and witnessed by the Government (paragraph entitled "Source Quality
Control"). Provide certified copies of the tests.
c. Provide field test reports (paragraph entitled "Field Quality Control").]
SD-03 Product Data
Conductors[; G][; G, [_____]]
Insulators[; G][; G, [_____]]
Concrete poles[; G][; G, [_____]]
Steel poles[; G][; G, [_____]]
Wood Poles
Nameplates[; G][; G, [_____]]
Pole top switch[; G][; G, [_____]]
Recloser[; G][; G, [_____]]
Sectionalizer[; G][; G, [_____]]
Cutouts[; G][; G, [_____]]
Transformer[; G][; G, [_____]]
Metering equipment[; G][; G, [_____]]
Meters[; G][; G, [_____]]
Surge arresters[; G][; G, [_____]]
Guy strand
Anchors
SD-05 Design Data
Concrete poles[; G][; G, [_____]]
Steel poles[; G][; G, [_____]]
Power-Installed Screw Foundations[; G][; G, [_____]]
SD-06 Test Reports
Wood Crossarm Inspection Report
Field Test Plan[; G][; G, [_____]]
Field Quality Control[; G][; G, [_____]]
Ground resistance test reports[; G][; G, [_____]]
Submit report of the acceptance test results as specified by paragraph entitled "Field Quality
Control"
SD-07 Certificates
Concrete poles[; G][; G, [_____]]
Steel poles[; G][; G, [_____]]
Wood poles[; G][; G, [_____]]
Wood crossarms[; G][; G, [_____]]
Transformer Losses[; G][; G, [_____]]
Submit certification from the manufacturer indicating conformance with the paragraph entitled
"Specified Transformer Losses."
SD-09 Manufacturer's Field Reports
Overhead-type distribution transformer routine and other tests[; G][; G, [_____]]
SD-10 Operation and Maintenance Data
Operation and Maintenance Manuals, Data Package 5[; G][; G, [_____]]
Submit operation and maintenance data in accordance with Section 01 78 23 OPERATION AND MAINTENANCE
DATA and as specified herein.
SD-11 Closeout Submittals
Transformer test schedule[; G][; G, [_____]]
1.5 QUALITY ASSURANCE
1.5.1 Regulatory Requirements
In each of the publications referred to herein, consider the advisory provisions to be mandatory. Interpret
references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean
the Contracting Officer. Provide equipment, materials, installation, and workmanship in accordance with the
mandatory and advisory provisions of NFPA 70 and IEEE C2 unless more stringent requirements are specified or
indicated.
1.5.2 Standard Products
Provide materials and equipment that are products of manufacturers regularly engaged in the production of such
products which are of equal material, design and workmanship. Provide products that have been in satisfactory
commercial or industrial use for 2 years prior to bid opening. The 2-year period includes applications of equipment
and materials under similar circumstances and of similar size. Provide a product that has been on sale on the
commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period. Where
two or more items of the same class of equipment are required, provide items that are products of a single manufacturer;
however, the component parts of the item need not be the products of the same manufacturer unless stated in this
section.
1.5.2.1 Alternative Qualifications
Products having less than a 2-year field service record are acceptable if a certified record of satisfactory
field operation for not less than 6000 hours, exclusive of the manufacturers' factory or laboratory tests, is
furnished.
1.5.2.2 Material and Equipment Manufacturing Date
Do not use products manufactured more than 3 years prior to date of delivery to site, unless specified otherwise.
1.5.3 Ground Resistance Test Reports
Submit the measured ground resistance of grounding system. When testing grounding electrodes and grounding systems,
identify each grounding electrode and each grounding system for testing. Include the test method and test setup
(i.e. pin location) used to determine ground resistance and soil conditions at the time the measurements were
made.
1.5.4 Wood Crossarm Inspection Report
Furnish an inspection report from an independent inspection agency, approved by the Contracting Officer, stating
that offered products comply with applicable AWPA and RUS standards. The RUS approved Quality Mark "WQC" on
each crossarm is acceptable, in lieu of inspection reports, as evidence of compliance with applicable AWPA treatment
standards.
1.5.4.1 Field Test Plan
Provide a proposed field test plan [20] [30] [_____] days prior to testing the installed system. Do not perform
field test until the test plan is approved. Provide a test plan that consists of complete field test procedures
including tests to be performed, test equipment required, and tolerance limits.
1.6 MAINTENANCE
1.6.1 Additions to Operations and Maintenance Data
In addition to requirements of Data Package 5, include the following in the operation and maintenance manuals
provided:
a. Assembly and installation drawings
b. Prices for spare parts and supply list
c. Date of purchase
1.7 DELIVERY, STORAGE, AND HANDLING
Visually inspect devices and equipment when received and prior to acceptance from conveyance. Protect stored
items from the environment in accordance with the manufacturer's published instructions. Replace damaged items.
Store oil filled transformers and switches in accordance with the manufacturer's requirements. Store wood poles
held in storage for more than 2 weeks in accordance with ATIS O5.1. Handle wood poles in accordance with ATIS O5.1
, except do not use pointed tools capable of producing indentations more than an inch in depth. Nails and holes
are not permitted in top of poles. Handle and store metal poles in accordance with the manufacturer's instructions.
1.8 WARRANTY
Support the equipment items by service organizations which are reasonably convenient to the equipment installation
in order to render satisfactory service to the equipment on a regular and emergency basis during the warranty
period of the contract.
PART 2 PRODUCTS
2.1 MATERIALS AND EQUIPMENT
NOTE: Specify a 120-hour test in a noncorrosive environment and specify a 480-hour
test in a corrosive environment.
Consider materials specified herein or shown on contract drawings which are identical to materials listed in
RUS 202-1 as conforming to requirements. Provide equipment and component items, not hot-dip galvanized or porcelain
enamel finished, with corrosion-resistant finishes which withstand [120] [480] hours of exposure to the salt
spray test specified in ASTM B 117 without loss of paint or release of adhesion of the paint primer coat to the
metal surface in excess of 1.6 mm 1/16 inch from the test mark. Provide the described test mark and test evaluation
in accordance with ASTM D 1654 with a rating of not less than 7 in accordance with TABLE 1, (procedure A). Coat
cut edges or otherwise damaged surfaces of hot-dip galvanized sheet steel or mill galvanized sheet steel with
a zinc rich paint conforming to the manufacturer's standard.
2.2 POLES
NOTE: Use "class" for wood poles and "strength" for concrete and steel poles.
Follow local utility practice regarding grounding metallic items on poles, after
coordination with local DPW/BCE. Specify clearances and climbing space in accordance
with IEEE C2 or applicable state code.
Provide poles of lengths and [classes] [strengths] indicated.
2.2.1 Wood Poles
NOTE: For NAVFAC Atlantic projects, do not use lodgepole pine or Western Larch
poles.
Wood poles machine trimmed by turning, [Douglas Fir] [Lodgepole Pine] [Western Larch] [Southern Yellow Pine]
[_____] conforming to ATIS O5.1 and RUS Bull 345-67. Gain, bore and roof poles before treatment. If additional
gains are required subsequent to treatment, provide metal gain plates. Pressure treat poles with [pentachlorophenol,]
[ammoniacal copper arsenate (ACA),] [chromated copper arsenate (CCA)], except do not treat Douglas Fir and Western
Larch poles with CCA in accordance with AWPA C1 and AWPA C4 as referenced in RUS Bull 345-67. Ensure the quality
of each pole with "WQC" (wood quality control) brand on each piece, or by an approved inspection agency report.
2.2.2 Preservative
NOTE: Choose one of the following three types of preservatives, according to
the environment.
For preservative used for humid, harsh environment, provide Chromated Copper Arsenate type (A)(B)(C) conforming
to AWPA T1 and ASTM D 1625.
Treat wood poles with waterborne preservatives conforming to AWPA T1.
2.2.3 Preservative Application
Apply preservative treatment using a pressure process conforming to and AWPA T1 for Southern Pine. Determine
penetration of preservatives as specified in AWPA A3 and obtain complete sapwood penetration.
Before treatment, roof, gain and bore poles that are to be given a full-length preservative treatment. Plug
unused holes in poles with treated wood-dowel pins. Treat field-cut gains or field-bored holes in poles with
an approved preservative compound.
2.2.4 Storage
For poles stored for any reason more than 2 weeks, stack them on pressure treated or decay-resistant skids of
such dimensions and so arranged as to support the poles without producing noticeable distortion. Stack poles
in a manner that permits free circulation of air; with the bottom poles of the stacks at least 300 millimeter
1-foot above ground level or any vegetation growing thereon. No decayed or decaying wood is permitted to remain
underneath stored poles.
2.2.5 Handling
Do not drag treated poles along the ground. Do not use pole tongs, cant hooks, and other pointed tools capable
of producing indentations more than 25 millimeter 1 inch in depth, in handling the poles. Do not apply tools
to the groundline section of any pole. Groundline section is that portion between 300 millimeter 1 foot above
and 600 millimeter 2 feet below the ground line.
2.2.6 Steel Poles
Provide steel poles that are designed to withstand the loads specified in IEEE C2 multiplied by the appropriate
overload capacity factors, that are hot-dip galvanized in accordance with ASTM A 123/A 123M and that are not
painted. Provide poles that have tapered tubular members, either round in cross-section or polygonal, and that
comply with strength calculations performed by a registered professional engineer. Submit calculations in accordance
with the design data portion of paragraph entitled "SUBMITTALS." Provide certification, from the manufacturer,
that the technical requirements of this specification are met. Provide one piece pole shafts. Provide welded
construction poles with no bolts, rivets, or other means of fastening except as specifically approved. Provide
pole markings that are approximately 900 to 1270 mm 3 to 4 feet above grade and that include manufacturer, year
of manufacture, top and bottom diameters, length, and a loading tree. Provide attachment requirements as indicated,
including grounding provisions. Climbing facilities are not required. Provide bases of the anchor-bolt-mounted
type.
2.2.7 Concrete Poles
NOTE: In areas where freezing temperatures occur, increase the minimum compressive
strength given for concrete in spun poles in line with concrete design for such
temperatures.
Provide concrete poles that are designed to withstand the loads specified in IEEE C2 multiplied by the appropriate
overload capacity factors. Provide reinforced or prestressed, either cast or spun poles. Provide spun poles
that are manufactured by a centrifugal spinning process with concrete pumped into a polished round tapered metal
mold. Provide concrete for spun poles that has a compressive strength of at least 34.5 MPa 5000 psi at 28 days;
steel wire that has an ultimate tensile strength of at least 827 MPa; 120,000 psi; and reinforcing bars that
have an ultimate tensile strength of at least 276 MPa 40,000 psi. After the high speed spinning action is completed,
cure a spun pole by a suitable wet steam process. Provide spun poles that have a water absorption of not greater
than three percent to eliminate cracking and to prevent erosion. Provide concrete poles that have hollow shafts.
Provide poles that have a hard, smooth, nonporous surface that is resistant to soil acids, road salts, and attacks
of water and frost. Do not install poles for at least 15 days after manufacture. Provide fittings and brackets
that conform to the concrete pole design. Provide poles that conform to strength calculations performed by a
registered professional engineer and submit in accordance with design data portion of paragraph entitled "SUBMITTALS."
Provide certification, from the manufacturer, that the technical requirements of this specification are met.
2.3 CROSSARMS AND BRACKETS
2.3.1 Wood Crossarms
Conform to RUS Bull 1728H-701. Pressure treat crossarms with pentachlorophenol, chromated copper arsenate (CCA),
or ammoniacal copper arsenate (ACA). Provide treatment that conforms to AWPA C25. Provide solid wood, distribution
type crossarms, with a 6.4 mm 1/4 inch 45 degree chamfer on all top edges. Provide cross-sectional area minimum
dimensions of 108.0 mm 4-1/4 inches in height by 82.6 mm 3-1/4 inches in depth in accordance with IEEE C2 for
Grade B construction. Provide crossarms that are 2.4 m 8 feet in length, except use 3.1 m 10 foot crossarms
for crossarm-mounted banked single-phase transformers or elsewhere as indicated. Provide crossarms that are
machined, chamfered, trimmed, and bored for stud and bolt holes before pressure treatment. Provide factory drilling
for pole and brace mounting, for four pin or four vertical line-post insulators, and for four suspension insulators,
except where otherwise indicated or required. Provide required climbing space and wire clearances by drilling.
Provide crossarms that are straight and free of twists to within 2.5 mm per 304.8 mm 1/10 inch per foot of length.
Provide bend or twist that is in one direction only.
2.3.2 Crossarm Braces
Provide [flat steel] [or] [steel angle] as indicated. Provide braces with [965 mm span with 2440 mm crossarms]
[and] [1520 mm span with 3050 mm crossarms] [38 inch span for 8 foot crossarms] [and] [60 inch span for 10 foot
crossarms].
2.3.3 Armless Construction
Provide pole mounting brackets for line-post or pin insulators and eye bolts for suspension insulators as shown.
Attach brackets to poles with a minimum of two bolts. Provide brackets either integrally as part of an insulator
or attached to an insulator with a suitable stud. Provide bracket mounting surface suitable for the shape of
the pole. Provide brackets for wood poles that have wood gripping members. Provide horizontal offset brackets
that have a 5-degree uplift angle. Provide pole top brackets that conform to IEEE C135.22, except for modifications
necessary to provide support for a line-post insulator. Provide brackets that have a strength exceeding that
of the required insulator strength, but in no case less than a 12.5 kN 2800 pound cantilever strength.
2.4 HARDWARE
NOTE: In hot humid marine atmospheres, galvanized steel pole-line hardware
is not acceptable. Permit only hot-dip galvanized malleable or ductile iron.
Check local usage. Navy projects require hot-dip galvanized hardware only.
Provide hot-dip galvanized hardware in accordance with ASTM A 153/A 153M and ASTM A 123/A 123M.
NOTE: Do not use this paragraph for Navy projects. The pole line construction
criteria for the Navy, including the listing of materials, is covered in the
pole plates.
[Provide zinc-coated hardware that complies with IEEE C135.1, IEEE C135.2, NEMA C135.4, ANSI C135.14 IEEE C135.22
. Provide steel hardware that complies with ASTM A 575 and ASTM A 576. Provide pole-line hardware that is hot-dip
galvanized [steel.] [steel, except use anchor rods of the copper-molten welded-to-steel type with nonferrous
corrosion-resistant fittings]. Install washers under boltheads and nuts on wood surfaces and elsewhere as required.
Provide washers used on through-bolts and double-arming bolts that are approximately 57.2 mm square 2-1/4 inches
square and 4.8 mm 3/16 inch thick. Make the diameter of holes in washers the correct standard size for the bolt
on which a washer is used. Provide washers for use under heads of carriage-bolts, of the proper size to fit
over square shanks of bolts. Use eye bolts, bolt eyes, eyenuts, strain-load plates, lag screws, guy clamps,
fasteners, hooks, shims, and clevises wherever required to support and to protect poles, brackets, crossarms,
guy wires, and insulators.]
2.4.1 Pins
Provide pins that are zinc-coated forged steel with lead-thread height to suit the insulator to be installed,
but not less than 115 millimeter high by 16 millimeter diameter 4-1/2-inches high by 5/8-inch diameter. Provide
shoulder that is not less than 50 millimeter 2-inch diameter and that is designed to distribute the load uniformly
to the crossarm. Provide shank that is not less than 16 millimeter diameter by 145 millimeter length 5/8-inch
diameter by 5-3/4-inch length, equipped with a 50 millimeter 2-inch square washer, nut, and locknut, and that
projects not less than 3 millimeter 1/8 inch nor more than 50 millimeter 2 inches beyond the locknut. Use broad-based
corner pins of drop-forged welded steel or malleable iron for turning small angles, as indicated.
2.4.2 Hot-Line Clamps
Make connections to overhead primary conductors with hot-line clamps of the screw type with concealed threads.
Fill thread chamber with corrosion-resistant compound. Provide hot-line clamp tap conductor of bare soft-drawn
seven-strand 5.2 millimeter diameter (No. 4) No. 4 copper, except that for the hot-line clamp tap conductor for
lateral lines 6.5 millimeter diameter (No. 2) No. 2 and larger, provide bare soft-drawn copper of the same size
and stranding as the lateral line.
Provide stirrups for hot-line clamp connections that are 100 by 100 millimeter 4 by 4 inches, and are constructed
of bare hard-drawn copper the same size as the tap line but not less than No. 4.
2.4.3 Secondary Racks
Provide secondary racks that are the 2-, 3-, or 4-wire type as required and are furnished complete with spool
insulators.
Provide racks that meet industry requirements for the strength and deflection of heavy-duty steel racks and that
are either galvanized steel or aluminum alloy.
Provide top of insulator points that are rounded and smooth. Hold insulators in place with a 16 millimeter 5/8-inch
buttonhead bolt equipped with a nonferrous cotter pin, or equivalent, at the bottom.
2.5 INSULATORS
NOTE: Stipulate insulator class required for each application. The following
table suggests insulator types from specific ANSI Standards for application
under normal conditions. Number followed by diagonal slash indicates quantity
of insulators when other than one. Environments with unusual contaminant conditions
require special treatment. Provide spool insulators for use with brackets,
or devices to support the neutral-messenger of triplex or quadruplex, secondary
or service cables that conform to NEMA C29.3 Class 53-2. Use the values in
Table II for NAVFAC Atlantic projects.
TABLE I
NESC min. ANSI C29.7 NEMA ANSI
Voltage dry flashover C29.5 Post C29.2 C29.4
kV kV Pin ("L" or "S") Suspension Guy Strain
5. or less 20 55-1 57-1 52-1 54-1
7.2 39 55-3 57-1 2/52-1 or 2/52-9 54-1
15 55 55-3 57-1 2/52-1 or 2/52-9 54-2
25 75 55-6 57-2 2/52-4 54-3
C29.6
35 100 56-3 57-2 3/52-4 54-3
TABLE II
NEMA ANSI C29.7 NEMA ANSI
Voltage C29.3 C29.5 Post C29.2 C29.4
kV Spool Pin ("L" or "S") Suspension Guy Strain
5. or less 53-2 55-3 57-1 52-1 54-4
15. 53-2 55-5 57-1 2/52-1 54-4
35 53-2 --- 57-4 3/52-4 54-4
When specifying or indicating post insulators, add the appropriate "L" or "S"
designation indicating "L" long studs or "S" short. Example: "57-1L" indicates
an insulator for wood crossarms and "57-1S" indicates an insulator for use on
steel members. When the engineer determines that station policy differs from
these requirements, specify insulators which match the policy in effect at the
station by ANSI reference and class. Determine insulator flashover values from
Table 273-1, IEEE C2. In areas with severe lightning problems, provide transmission
line corners and dead ends with special pressure-treated wood-guy insulators
having arcing horns for lighting discharge. In addition to being used with
underground terminals, use fiberglass guy strain insulators where other interference
problems exist.
Provide wet-process porcelain insulators which are radio interference free.
[a. Line post type insulators: NEMA C29.7, Class [_____].]
[b. Suspension insulators: NEMA C29.2 [4/52-4 for 34.5 kV on NAVSTA NORVA], Quantity per Phase,
[_____], Class [_____].]
[c. Spool insulators: NEMA C29.3, Class [_____].]
[d. Guy strain insulators: NEMA C29.4, Class [_____], [except provide fiberglass type when
used with underground terminal or when other interference problems exist].]
[e. Pin insulators: NEMA C29.5, Class [_____].]
2.6 OVERHEAD CONDUCTORS, CONNECTORS AND SPLICES
NOTE: For NAVFAC Atlantic projects, do not use "aluminum conductor steel reinforced
(ACSR)."
Conductors of bare [copper] [aluminum (AAC)] [aluminum alloy (AAAC)] [aluminum conductor steel reinforced (ACSR)]
of sizes and types indicated. [Where aluminum conductors are connected to dissimilar metal, use fittings conforming
to UL 486A-486B.]
2.6.1 Solid Copper
ASTM B 1, ASTM B 2, and ASTM B 3, hard-drawn, medium-hard-drawn, and soft-drawn, respectively. ASTM B 8, stranded.
2.6.2 Aluminum (AAC)
ASTM B 230/B 230M and ASTM B 231/B 231M.
2.6.3 Aluminum Alloy (AAAC)
ASTM B 398/B 398M or ASTM B 399/B 399M.
2.6.4 Aluminum Conductor Steel Reinforced (ACSR)
ASTM B 232/B 232M, aluminum.
2.6.5 Connectors and Splices
Provide connectors and splices of copper alloys for copper conductors, aluminum alloys for aluminum-composition
conductors, and a type designed to minimize galvanic corrosion for copper to aluminum-composition conductors.
Provide aluminum-composition, aluminum-composition to copper, and copper-to-copper that complies with UL 486A-486B
.
2.7 NEUTRAL-SUPPORTED SECONDARY AND SERVICE DROP CABLES
NOTE: The term "secondary," for our general purpose, means either bare or insulated
conductors installed between poles and operated at the utilization voltage.
Utilize bare conductors on long span, open wire design when a neutral-supported
secondary cable is not appropriate due to weight. When using bare conductors
for secondary applications use the above paragraph entitled "Overhead Conductors".
"Services" are insulated conductors extending from a pole to the metering point
or service entrance connection at the utilization point. Minimum conductor
size for aluminum, aluminum alloy, or ACSR is No. 4 AWG and for copper, No.
6 AWG. For LANTNAVFACENGCOM projects, do not use ACSR.
Provide [Service] [Secondary] cables of [aluminum] [copper], [triplex] [quadruplex] with cross-linked polyethylene
insulation on the phase conductors. Provide bare [ACSR] [aluminum alloy] [hard drawn copper] that is the same
size as the phase conductors unless otherwise indicated. Provide cables that conform to [NEMA WC 70][ and ][
NEMA WC 71] for cross-linked polyethylene insulation.
2.8 GUY STRAND
[ASTM A 475, [high-strength] [extra high-strength], Class A or B, galvanized strand steel cable][Class 30 [high-strength][extra
high-strength] copper-clad steel]. Provide guy strand that is [_____] mm inch in diameter with a minimum breaking
strength of [_____] Newton pounds. Provide guy terminations designed for use with the particular strand and
developing at least the ultimate breaking strength of the strand.
2.9 ROUND GUY MARKERS
Vinyl or PVC material, [white] [yellow] colored, 2440 mm 8 feet long and shatter resistant at sub-zero temperatures.
2.9.1 Guy Attachment
Thimble eye guy attachment.
2.10 ANCHORS AND ANCHOR RODS
NOTE: Complete guy-anchor assembly provides strength conforming to IEEE C2
for the grade of construction of the line. In areas of extremely high chemical
activity of the soil, completely encaseanchor rods and ground rods in concrete
to point 100 mm 4 inches above finished grade. Provide anchors that are a special
unit to be indicated.
Provide anchors that present holding area indicated on drawings as a minimum. Provide anchor rods that are triple
thimble-eye, [19] [25] mm diameter by 2440 mm [3/4] [one] inch diameter by 8 feet long. Provide anchors and
anchor rods that are hot dip galvanized.
2.10.1 Screw Anchors
NOTE: For NAVFAC Atlantic projects normally use screw type anchors. Provide
Newton pound rating and leave out "[fitting Class 6000]."
Screw type [swamp] anchors having a manufacturer's rating [of not less than [_____] Newton pounds in loose to
medium sand/clay soil, Class 6] [at least equal to rating indicated] and extra heavy pipe rods conforming to
ASTM A 53/A 53M, Schedule 80, and couplings conforming to ASME B16.11, [fitting Class 6000.]
2.10.2 Plate Anchors
Minimum area of [_____] square mm inches and rated by manufacturer for [_____] Newton pounds or more in soils
classified as medium dense coarse sand and sandy gravels; firm to stiff clays and silts.
2.10.3 Rock Anchors
Rock anchors having a manufacturer's rating of [102,310][160,130] Newtons [23,000][36,000] pounds.
2.11 GROUNDING AND BONDING
2.11.1 Driven Ground Rods
NOTE: Use "copper-clad steel" ground rods for NAVFAC Atlantic projects.
Provide [copper-clad steel ground rods conforming to UL 467][zinc-coated steel ground rods conforming to ANSI C135.30
][solid stainless steel ground rods] not less than 19 mm 3/4 inch in diameter by 3.1 m 10 feet in length. Sectional
type rods are acceptable for rods 6.1 m 20 feet or longer.
2.11.2 Grounding Conductors
ASTM B 8. Provide soft drawn copper wire ground conductors a minimum No. 4 AWG. Provide PVC ground wire protectors.
2.11.3 Grounding Connections
UL 467. Exothermic weld or compression connector.
2.12 SURGE ARRESTERS
NOTE: Rating of lightning (surge) arresters is 125 percent of the nominal line-to-ground
voltage of four-wire, multi-grounded neutral systems; 80 percent of the nominal
line-to-line voltage for three-wire, solidly grounded neutral systems; or nominal
line-to-line voltage for delta and ungrounded-wye systems. Normally use distribution
class arresters. However, use intermediate class on the 34.5 kV system at Naval
Base, Norfolk, VA.
IEEE C62.11, metal oxide, polymeric-housed, surge arresters arranged for [crossarm] [equipment] mounting. Provide
[3] [6] [9] [10] [12] [15] [27] [30] [36] kV RMS voltage rating. Provide [Distribution] [Intermediate] [Station]
class arresters.
2.13 FUSED CUTOUTS
NOTE: Include last bracketed sentence for NAS Pensacola projects. Delete it
in all other projects. For NAVFAC Atlantic projects, use "open type" cutouts
with Type "K" fuses as indicated.
[Open] [Enclosed] type fused cutouts rated [100] [200] amperes and [_____] amperes symmetrical interrupting current
at [[7.8] [15] kV ungrounded] [8.3/15 kV gnd Y] [15/26 kV gnd Y] [27/34.5 kV gnd Y], conforming to IEEE C37.42
. Type [K] [T] fuses conforming to IEEE C37.42 with ampere ratings [as indicated] [equal to 150 percent of the
transformer full load rating]. Open link type fuse cutouts are not acceptable. [Provide heavy duty open drop-out
type, rated 15 kV, 200 Amp, 7,100 Amp I.C. (Sym.).]
2.14 CONDUIT RISERS AND CONDUCTORS
Provide PVC riser shield containing a PVC back plate and PVC extension shield or a rigid galvanized steel conduit,
as indicated, and conforming to UL 6. Provide conductors and terminations as specified in Section
33 71 02.00 20 UNDERGROUND TRANSMISSION AND DISTRIBUTION.
2.15 TRANSFORMER (OVERHEAD-TYPE DISTRIBUTION)
NOTE: Use the following guidelines for specifying transformers.
1. Use IEEE C57.12.00, Figure 3 (a), voltage designations, such as 4160 V -
120/240 V.
2. Select impedance value in accordance with technical note under paragraph
entitled "Specified Transformer Losses."
3. Do not use fully self-protected transformers.
a. IEEE C57.12.20.
b. Single phase, self-cooled, 65 degrees C. continuous temperature rise, two winding, 60 Hertz.
c. Insulating liquid:
NOTE: Choose one of the following options. For NAVFAC Atlantic, choose less-flammable
transformer liquids for all projects unless there is a specific requirement
to do otherwise.
[Mineral oil: ASTM D 3487, Type II, tested in accordance with ASTM D 117. Provide identification
of transformer as "non-PCB" and "Type II mineral oil" on the nameplate.]
[Less-flammable transformer liquids: NFPA 70 and FM P7825 for less-flammable liquids having
a fire point not less than 300 degrees C tested per ASTM D 92 and a dielectric strength not
less than 33 kV tested per ASTM D 877. Provide identification of transformer as "non-PCB" and
"manufacturer's name and type of fluid on the nameplate.
Provide fluid that is a biodegradable electrical insulating and cooling liquid classified by
UL and approved by FM as "less flammable fluids. Provide fluid that meets the following fluid
properties:
(1) Pour point: ASTM D 97, less than -15 degrees C
(2) Aquatic biodegradation: EPA 712-C-98-075, 100%.
(3) Trout toxicity: OECD Test 203, zero mortality of EPA 600/4-90/027F, pass.]
d. Ratings:
(1) kVA: [_____].
(2) BIL: [95] [75] [60] kV.
(3) Primary voltage: [_____] kV.
(4) Secondary voltage: [_____] volts.
(5) Minimum Tested Impedance at 85 degrees C: [____] percent.
[e. Single-phase connections:
(1) Connect primary: [Phase-to-phase] [Phase-to-ground].
(2) Provide transformer with [_____] high voltage bushing(s).]
[f. Three-phase connections:
(1) Connect primary: [Grounded wye] [Ungrounded wye] [Delta].
(2) Connect secondary: [Grounded wye] [Delta], for [_____] volt, three phase, [_____] wire
service.
(3) Provide transformer with [_____] high voltage bushings.]
g. Taps:
(1) Provide four 2 1/2 percent full capacity taps, 2 above and 2 below rated primary voltage.
Provide tap changer that has an external handle.
NOTE: The "series-multiple voltage-changing switch" is in the primary winding
of the transformer and is for dual-voltage systems. It is normally used when
a base is planning a voltage upgrade of its primary distribution system or when
there are multiple systems on base and they want the transformer to be interchangeable.
Caution: If this option is indicated, specify the BIL level for the higher
voltage and coordinate actual transformer losses with multiple manufacturers
and specify to obtain an energy efficient transformer.
[h. Externally operated Series-Multiple Voltage-Changing Switch.]
i. Corrosion Protection:
NOTE: In hostile environments, the additional cost of stainless steel tanks
and covers is justified.
[Provide transformer tanks and covers that are corrosion resistant and are fabricated of stainless
steel conforming to ASTM A 167, Type 304 or 304L.] Provide paint coating system that complies
with IEEE C57.12.28 regardless of tank and cover material. Provide light gray, ANSI color No.
70 finish coat.
j. Show transformer kVA capacity using 65 mm 2 1/2 inch Arabic numerals placed near the low-voltage
bushings.
2.15.1 Specified Transformer Losses
NOTE: This paragraph is for use on Navy Projects only.Steps to specifying transformer
losses.
1. Print Tables OH-1, OH-2, OH-3, and EC-1 or EC-2 as applicable (directions
included at the front of this specification).
2. Obtain energy cost for the specific activity from the cognizant EFD or PWC.
Base energy costs on the cost of energy without the demand charge factors scaled
in. Use Table EC-1 for energy costs at the NAVFAC Atlantic activities indicated.
3. Use Tables OH-1, OH-2, and OH-3 to specify losses and impedances for transformers
based on energy cost range, and transformer primary and secondary voltages.
4. Perform fault current calculations to verify that distribution equipment
is coordinated with impedance specified.
Provide no-load losses (NLL) in watts at 20 degrees C, and load losses (LL) in watts at 85 degrees C, as follows:
NAME KVA "NLL" "LL"
[T1] [_____] [_____] [_____]
[T2] [_____] [_____] [_____]
Use the values for the specified losses for comparison with the losses determined during the routine tests.
If the routine test values exceed the specified values by more than the tolerances allowed by Table 19 in IEEE C57.12.00
, the transformer is unacceptable.
[2.16 GROUP-OPERATED LOAD INTERRUPTER SWITCHES
2.16.1 Manually Operated Type (Switch Handle Operated)
Provide manually operated (switch handle operated) load interrupter switches that comply with IEEE C37.32 and
are of the outdoor, manually-operated, three-pole, single-throw type with either tilting or rotating insulators.
Provide switches that are equipped with interrupters capable of interrupting currents equal to the switch's continuous
current rating. Provide preassembled switches for the indicated configuration and mounting. Provide high-pressure,
limited-area type moving contacts, designed to ensure continuous surface contact. Provide fused or non-fused
switches as indicated. Provide switches complete with necessary operating mechanisms, handles, and other items
required for manual operation from the ground. Locate switch operating handles approximately 1.1 meters 3 feet
6 inches above final grade. Provide insulation of switch operating mechanisms that includes both insulated interphase
rod sections and insulated vertical shafts. Provide each handle with a padlock arranged to lock the switch in
both the open and the closed position.
[2.16.2 Remotely Operated Type (Stored-Energy Actuator)
NOTE: SF6 switches are available for nominal voltages of 15 kV through 34.5
kV in 600 ampere continuous and load-break ratings. Delete SCADA equipment
and remote telemetry when not required.
Provide remotely-operated, [air-insulated] [SF6 insulated] load interrupter switches that are rated in accordance
with and comply with the requirements of IEEE C37.32 and are of the outdoor, three-pole, [pole-mounted] [crossarm-mounted]
type. Provide interrupter devices that are [air-insulated] [SF6-insulated, puffer-type] switches capable of
interrupting currents equal to the switch continuous current ratings indicated. Provide switches that utilize
an electric motor-charged, stored-energy (spring-driven) operator to simultaneously trip all phases. Provide
a switch-control unit [for push-button operation from the ground] [for push-button operation from the ground
and remote switch actuation via telemetry]. Provide a switch-control unit that is pad-lockable, tamper-resistant,
in a NEMA ICS 6, Type [3R] [4] [4X] [4X-SS] enclosure, which is connected to the switch actuator by a shielded
control cable. Provide control power for closing and tripping by a battery mounted in the control unit enclosure.
Provide the switch control unit with a separate 120 volt ac circuit for the battery powered. Power for charging
the operator mechanism is 120 volt ac or battery powered. If operator mechanism charging power is from a battery,
provide capacity for a minimum of [_____] [four] sequential opening and closing operation without battery charging.
Configure the switch control unit for supervisory, control, and data acquisition (SCADA) function, including
local and remote operation. Provide voltage and current sensors, one set for each phase, for monitoring of both
normal and fault conditions. Provide switches with visual indication of open switch contact for clearance and
isolation purposes. Provide switch mechanisms with provisions for grounding of nonenergized metal parts. Provide
the switch control unit with switch operations.
]][2.17 RECLOSER
IEC 62271-111. [Provide recloser controller that is [electronically] [hydraulically] operated and utilize [oil]
[vacuum] operating medium.]
][2.18 SECTIONALIZER
IEEE C37.63.
][2.19 METERING EQUIPMENT
NOTE: "Metering Equipment" paragraph and its subparagraphs are for primary
metering. Only use when primary metering is required by the local utility company
and specific metering requirements have been properly coordinated with the cognizant
EFD/EFA. Cover secondary metering in Sections 16272 THREE-PHASE PAD-MOUNTED
TRANSFORMERS, 16273 SINGLE-PHASE PAD-MOUNTED TRANSFORMERS, or 26 20 00 INTERIOR
DISTRIBUTION SYSTEM as applicable.
Provide pole mounted metering equipment that includes current transformers, potential transformers, watthour
meter, [meter test switch block,] metering enclosure, wire, conduit and fittings.
2.19.1 Potential Transformers
Provide potential transformers that are rated for outdoor service fitted for crossarm mounting and secondary
connection box for conduit connection. Provide [2.4] [4.16] [7.2] [12.0] [12.47] [_____] kV to 120 volts ac,
60 Hz voltage rating. Provide transformers that conform to the requirements of IEEE C57.13 BIL [45] [60] [75]
[95] kV and accuracy Class 0.3 (min.) of [75 VA] [burden Y].
2.19.2 Current Transformers
Provide current transformers that are rated for outdoor service with crossarm mounting and secondary connection
box for conduit connection. Provide [2.4] [4.16] [7.2] [12.47] [12.0] [_____] kV voltage rating. Provide [_____]
to 5 amperes current rating. Provide transformers that conform to requirements of IEEE C57.13, BIL [45] [60]
[75] [95] kV and accuracy Class 0.3 at [B2.0] [50 VA].
2.19.3 Watthour Meter
Provide meter with provisions for future pulse initiation.
a. Meters: NEMA C12.10 and NEMA C12.1; when providing meter with electronic time-of-use register.
(1) Form: [5A] [5S] [6A] [6S].
(2) Element: [2] [2 1/2] [3].
(3) Voltage: 120 volts.
(4) Current: 2 1/2 amperes.
(5) Frequency: 60 hertz.
(6) Kilowatt hour register: 5 dial or 5 digit type.
b. Demand register:
(1) Solid state type.
(2) Meter reading multiplier:
(a) Indicate multiplier on the meter face.
(b) Provide multiplier in even hundreds.
(3) Program demand interval length: for [15] [30] [60] minutes with rolling demand up to six
subintervals per interval.
c. Mounting:
(1) Provide meter with [matching socket per ANSI C12.7 with [manual] [automatic] current short-circulating
device.] ["A" base type mounting].
[2.19.4 Meter Test Block
Provide meter test block with [T] [10] pole group of open knife type switches designed for the isolation of metering
devices at meter location by opening each circuit individually. Provide current switches that short circuit
current supply before opening meter circuit. Provide black switch handles of potential switches. Provide red
switch handles of current switches.
]2.19.5 Metering Enclosure
Provide metering enclosure of galvanized steel, weatherproof construction with pole mounting bracket, and 19
mm 3/4 inch exterior plywood, full size backboard and hinged door arranged for padlocking in closed position.
Provide adequate internal space to house equipment and wiring but not smaller than 510 by 760 by 280 mm 20 by
30 by 11 inches deep. Paint metal manufacturer's standard finish.
]2.20 CAPACITORS
Provide capacitor equipment that complies with IEEE Std 18 and that is of the three-phase, grounded-wye, outdoor
type rated for continuous operation and automatically switched. Provide equipment suitable for mounting on a
single pole. Do not use polychlorinated biphenyl and tetrachloroethylene (perchloroethylene) as the dielectric.
Provide equipment that is rated for the system voltage. Provide the indicated kvars that are automatically switched
by [single-step] [time switch] [voltage] [current] [kilovar] [control] [multiple-step] [voltage] [kilovar] [control
providing the indicated number of steps and switching the indicated kvar]. Provide necessary transformers for
sensing circuit variations and for low-voltage control. Provide oil-immersed switches for automatic switching
of capacitors, electrically separate from ungrounded capacitor enclosures and metal frames. Provide installations
that include one primary fuse cutout and one surge arrester for each ungrounded phase conductor. Provide fuse
link ratings in accordance with the manufacturer's recommendations. Provide capacitor equipment, except for
low-voltage control and primary fuse cutouts, that is subassembled and coordinated by one manufacturer. Ship
units, including metal pole-mounting supports and hardware, in complete sections ready for connection at the
site. Provide low-voltage equipment that is socket or cabinet type, mounted on the pole approximately 1.2 m
4 feet above grade, connected with the necessary wiring in conduit to capacitor equipment, provided with secondary
arrester protection against switching surges when recommended by the manufacturer.
2.21 VOLTAGE REGULATOR
NOTE: Bypass arresters are normally standard equipment. Coordinate with the
manufacturer to determine if incoming line arresters are needed.
Provide voltage regulators that comply with IEEE C57.15 and are of the outdoor, self-cooled, 55/65 degrees C
temperature rise, single-phase type. Provide windings and the load-tap-changing mechanism that are mineral-oil-immersed.
When operating under load, provide a regulator with plus and minus 10 percent automatic voltage regulation in
approximately 5/8 percent steps, with 16 steps above and 16 steps below rated voltage. Provide automatic control
equipment with Class 1 accuracy. Provide bypass surge arresters suitable for [a grounded] [an ungrounded] system
and for the associated regulator voltage. [Provide [station] [intermediate] class surge arresters that are mounted
next to each incoming line bushing on a regulator tank-mounted bracket and connected to a surge arrester ground
pad-mounted on the regulator tank].
2.21.1 Ratings
Provide the following ratings at 60 Hz
Maximum voltage...........................................[_____]
Basic Insulation Level (BIL)..............................[_____]
Current...................................................[_____]
2.21.2 Bypass and Isolation Switches
Provide switches of the outdoor, stickhook-operated, single-pole, single-throw, vertical-break type suitable
for the indicated mounting. Provide switches of a type designed to provide bypass of a single-phase regulator
circuit by an integral sequence which always occurs when each switch is opened or closed. Provide opening sequences
that initially bypass the single-phase regulator circuit, then open the input and output circuits, and finally
interrupt the exciting current. Make opening any single-phase regulator circuit not possible until after the
bypass circuit is closed. Provide ratings at 60 Hz in accordance with IEEE C37.41 and as follows:
Maximum voltage...........................................[_____]
Nominal voltage class.....................................[_____]
BIL.......................................................[_____]
Momentary asymmetrical current in the closed position.....[_____]
Momentary asymmetrical current in the bypass position.....[_____]
Continuous and interrupting current.......................[_____]
2.21.3 Miscellaneous
Provide standard accessories and components in accordance with IEEE C57.15. Provide single-phase units with
additional components and accessories required by IEEE C57.15 for three-phase units.
2.22 ELECTRICAL TAPES
Provide UL listed tapes for electrical insulation and other purposes in wire and cable splices. Provide terminations,
repairs and miscellaneous purposes, electrical tapes that comply with UL 510.
2.23 CALKING COMPOUND
Provide compound for sealing of conduit risers that is of a puttylike consistency workable with hands at temperatures
as low as 2 degrees C 35 degrees F, that does not slump at a temperature of 150 degrees C 300 degrees F, and
that does not harden materially when exposed to air. Provide compound that readily caulks or adheres to clean
surfaces of the materials with which it is designed to be used. Provide compound that has no injurious effects
upon the workmen or upon the materials.
2.24 NAMEPLATES
2.24.1 Manufacturer's Nameplate
Provide each item of equipment with a nameplate bearing the manufacturer's name, address, model number, and serial
number securely affixed in a conspicuous place; the nameplate of the distributing agent is not acceptable. Provide
equipment containing liquid-dielectrics with the type of dielectric on the nameplate.
2.24.2 Field Fabricated Nameplates
ASTM D 709. Provide laminated plastic nameplates for each equipment enclosure, relay, switch, and device; as
specified or as indicated on the drawings. Identify the function and, when applicable, the position with each
nameplate inscription. Provide melamine plastic, 3 mm 0.125 inch thick nameplates, white with [black] [_____]
center core. Provide matte finish surface. Provide square corners. Accurately align lettering and engrave
into the core. Minimum size of nameplates is 25 by 65 mm one by 2.5 inches. Minimum size of lettering is 6.35
mm 0.25 inch high normal block style.
2.25 SOURCE QUALITY CONTROL
2.25.1 Transformer Test Schedule
The Government reserves the right to witness tests. Provide transformer test schedule for tests to be performed
at the manufacturer's test facility. Submit required test schedule and location, and notify the Contracting
Officer 30 calendar days before scheduled test date. Notify Contracting Officer 15 calendar days in advance
of changes to scheduled date.
a. Test Instrument Calibration
(1) Provide a manufacturer that has a calibration program which assures that all applicable
test instruments are maintained within rated accuracy.
(2) Provide an accuracy that is directly traceable to the National Institute of Standards and
Technology.
(3) Provide instrument calibration frequency schedule that does not exceed 12 months for both
test floor instruments and leased specialty equipment.
(4) Provide visible dated calibration labels on all test equipment.
(5) Provide calibrating standard of higher accuracy than that of the instrument tested.
(6) Keep up-to-date records that indicate dates and test results of instruments calibrated
or tested. For instruments calibrated by the manufacturer on a routine basis, in lieu of third
party calibration, include the following:
(a) Maintain up-to-date instrument calibration instructions and procedures for each test instrument.
(b) Identify the third party/laboratory calibrated instrument to verify that calibrating standard
is met.
2.25.2 Routine and Other Tests
IEEE C57.12.00 and IEEE C57.12.90. Perform routine and other tests by the manufacturer on [each of] the actual
transformer(s) prepared for this project to ensure that the design performance is maintained in production.
Submit test reports, by serial number and receive approval before delivery of equipment to the project site.
Provide required tests as follows:
a. Polarity
b. Ratio
c. No-load losses (NLL) and excitation current
d. Load losses (LL) and impedance voltage
e. Dielectric
(1) Impulse
(2) Applied voltage
(3) Induced voltage
f. Leak
PART 3 EXECUTION
3.1 INSTALLATION
NOTE: In areas where the applicable State code is more stringent, substitute
it for IEEE C2 and make the required changes under paragraph entitled "References."
In California, use CALPUC G.O.95, State of California Public Utilities Commission.
Provide overhead pole line installation conforming to requirements of [_____] [IEEE C2] [CALPUC G.O. 95] for
Grade [B] [C] construction of overhead lines in [light] [medium] [heavy] loading districts and NFPA 70 for overhead
services. Provide material required to make connections into existing system and perform excavating, backfilling,
and other incidental labor. Consider street, alleys, roads and drives "public." Provide pole configuration
as indicated.
3.1.1 Overhead Service
Terminate overhead service conductors into buildings at service entrance fittings or weatherhead outside building.
Installation and connection of service entrance equipment to overhead service conductor is included in Section
26 20 00 INTERIOR DISTRIBUTION SYSTEM. Provide nearby support bracket for overhead wires that is not less than
[______] meters feet above finished grade at building. Provide drip loops that are formed on conductors at entrances
to buildings, cabinets, or conduits.
3.1.2 Tree Trimming
Where lines pass through trees, trim trees at least[ 4.5 meters 15 feet][______] clear on both sides horizontally
and below for medium-voltage lines, and[ 1.5 meters 5 feet][______] clear on both sides horizontally and below
for other lines. Do not allow a branch to overhang horizontal clearances. Where trees are indicated to be removed
to provide a clear right-of-way, clearing is specified in Section 31 11 00 CLEARING AND GRUBBING.
3.1.3 Wood Pole Installation
NOTE: Include the bracketed sentence for projects where poles are set in tropical
areas of the Pacific Ocean, that are infested by the Formosan termite, coptotermes
formosanus shirake. Delete it in other projects. For NAVFAC Pacific projects,
contact Code 18, Environmental Division, for latest guidance on termite treatment
methods.
Provide pole holes at least as large at the top as at the bottom and large enough to provide 100 mm 4 inch clearance
between the pole and side of the hole. [Provide a 150 mm 6 inch band of soil around and down to the base of
the pole treated with 7.5 to 11.4 liters 2 to 3 gallons of a one percent dursban TC termiticide solution.]
3.1.3.1 Setting Depth of Pole
Provide pole setting depths as follows:
Length of Pole Setting in Soil Setting in Solid Rock
(mm) (mm) (mm)
6095 1520 910
7600 1675 1065
9120 1675 1065
10640 1825 1215
12160 1825 1215
13680 1980 1370
15200 2130 1370
16720 2280 1520
18240 2440 1520
19810 2590 1675
21340 2740 1675
22860 2895 1825
24380 3050 1825
25910 3200 1980
27430 3350 1980
28950 3500 2130
30480 3810 2280
Length of Pole Setting in Soil Setting in Solid Rock
(feet) (feet) (feet)
20 5.0 3.0
25 5.5 3.5
30 5.5 3.5
35 6.0 4.0
40 6.0 4.0
45 6.5 4.5
50 7.0 4.5
55 7.5 5.0
60 8.0 5.0
65 8.5 5.5
70 9.0 5.5
75 9.5 6.0
80 10.0 6.0
85 10.5 6.5
90 11.0 6.5
95 11.5 7.0
100 12.5 7.5
3.1.3.2 Setting in Soil, Sand, and Gravel
"Setting in Soil" depths, as specified in paragraph entitled "Setting Depth of Pole," apply where the following
occurs:
a. Where pole holes are in soil, sand, or gravel or any combination of these;
b. Where soil layer over solid rock is more than 610 mm 2 feet deep;
c. Where hole in solid rock is not substantially vertical; or
d. Where diameter of hole at surface of rock exceeds twice the diameter of pole at same level.
[At corners, dead ends and other points of extra strain, set poles that are 12160 mm 40 feet
or more long 150 mm 6 inches deeper.]
3.1.3.3 Setting in Solid Rock
"Setting in Solid Rock," as specified in paragraph entitled "Setting Depth of Pole," applies where poles are
to be set in solid rock and where hole is substantially vertical, approximately uniform in diameter and large
enough to permit use of tamping bars the full depth of hole.
3.1.3.4 Setting With Soil Over Solid Rock
Where a layer of soil 610 mm 2 feet or less in depth over solid rock exists, make depth of hole the depth of
soil in addition to depth specified under "Setting in Solid Rock" in paragraph entitled "Setting Depth of Pole,"
provided, however, that such depth does not exceed depth specified under "Setting in Soil."
3.1.3.5 Setting on Sloping Ground
On sloping ground, always measure hole depth from low side of hole.
3.1.3.6 Backfill
Thoroughly tamp pole backfill for full depth of the hole and mound excess fill around the pole.
3.1.3.7 Setting Poles
Set poles so that alternate crossarm gains face in opposite directions, except at terminals and dead ends where
gains of last two poles are on side facing terminal or dead end. On unusually long spans, set poles so that
crossarm comes on side of pole away from long span. Where pole top pins are used, place on opposite side of
pole from gain, with flat side against pole.
3.1.3.8 Alignment of Poles
Set poles in alignment and plumb except at corners, terminals, angles, junctions, or other points of strain,
set and rake them against the strain. Set not less than 50 mm 2 inches for each 3050 mm 10 feet of pole length
above grade, nor more than 100 mm 4 inches for each 3050 mm 10 feet of pole length after conductors are installed
at required tension. When average ground run is level, vary consecutive poles by not more than 1525 mm 5 feet
in height. When ground is uneven, keep poles differing in length to a minimum by locating poles to avoid the
highest and lowest ground points. If it becomes necessary to shorten a pole, saw a piece off the top. Dig holes
large enough to permit the proper use of tampers to full depth of hole.
3.1.3.9 Pole Caps
NOTE: Pole caps are not necessary for ACA/CCA treated poles.
Provide plastic pole caps with 6.35 mm 1/4 inch sealing rings and four nailing tabs. Fill sealing area with
either a bituminous, elastigum roof cement or an acceptable preservative paste to level of sealing ring to eliminate
possibility of condensation. Place on pole top and nail each tab down with a 31.75 mm 1 1/4 inch nail.
3.1.3.10 Marking
Mark each pole in accordance with the requirements of ATIS O5.1. Locate marking on the face of the pole approximately
3 meter 10 feet from the butt on the pole. Mark on the face of the pole at other locations standard with the
pole manufacturer, where approved by the Contracting Officer.
Number poles as indicated. Number poles not having numbers indicated as directed by the Contracting Officer.
Provide pole numbers that consist of aluminum numerals and characters not less than 65 millimeter 2-1/2-inches
high fastened to the pole with aluminum nails. Locate numerals to provide maximum visibility from the road
or patrol route.
3.1.4 Steel and Concrete Pole Setting
Mount poles on cast-in-place or power-installed screw foundations. [Embed concrete poles in accordance with
the details shown.] Provide conduit elbows for cable entrances into pole interiors.
3.1.4.1 Cast-In-Place Foundations
NOTE: Use Section 03300N for Navy projects and 03300A for other projects.
Provide concrete foundations, sized as indicated, with anchor bolts accurately set in foundations using templates
supplied by the pole manufacturer. Concrete work and grouting is specified in [Section 03 30 00CAST-IN-PLACE
CONCRETE][Section 03 31 00.00 10 CAST-IN-PLACE STRUCTURAL CONCRETE]. After the concrete has cured, set pole
anchor bases on foundations and level by shimming between anchor bases and foundations or by setting anchor bases
on leveling nuts and grouting. Set poles plumb. Provide the manufacturer's standard anchor bolts, and not less
than necessary to meet the pole wind loading specified herein and other design requirements.
3.1.4.2 Power-Installed Screw Foundations
Use power-installed screw foundations if they have the required strength, mounting-bolt, and top plate dimensions.
Provide at least 6.4 mm 1/4 inch thick structural steel screw foundations conforming to ASTM A 36/A 36M and hot-dip
galvanized in accordance with ASTM A 123/A 123M. Mark conduit slots in screw foundation shafts and top plates
to indicate orientation. Design calculations indicating adequate strength require approval before installation
of screw foundation is permitted. Submit calculations in accordance with the design data portion of paragraph
entitled "SUBMITTALS."
3.1.5 Anchors and Guys
Place anchors in line with strain. Provide indicated length of the guy lead (distance from base of pole to the
top of the anchor rod).
3.1.5.1 Setting Anchors
Set anchors in place with anchor rod aligned with, and pointing directly at, guy attachment on the pole with
the anchor rod projecting 150 to 230 mm 6 to 9 inches out of ground to prevent burial of rod eye.
3.1.5.2 Backfilling Near [Plate] Anchors
NOTE: If plate anchors are chosen, for NAVFAC Atlantic projects, include the
bracketed option in the title of the paragraph and use the second bracketed
sentence.
[Backfill plate, expanding, concrete, or cone type anchors with tightly tamped coarse rock 610 mm 2 feet immediately
above anchor and then with tightly tamped earth filling remainder of hole.]
[Backfill plate anchors with tightly tamped earth for full depth of hole.]
3.1.5.3 Screw Anchors
Install screw anchors by torquing with boring machine.
3.1.5.4 Swamp Anchors
Install swamp anchors by torquing with boring machine or wrenches, adding sections of pipe as required until
anchor helix is fully engaged in firm soil.
3.1.5.5 Rock Anchors
Install rock anchors minimum depth 305 mm 12 inches in solid rock.
3.1.5.6 Guy Installation
NOTE: Insulate or ground guy strand in conformance with IEEE C2 or local practice.
Complete a soil survey early in the design to properly select the type of anchor.
Provide guys where indicated, with loads and strengths as indicated, and wherever conductor tensions are not
balanced, such as at angles, corners and dead-ends. Where single guy do not provide the required strength, provide
two or more guys. Where guys are wrapped around poles, provide at least two guy hooks. Provide pole shims where
guy tension exceeds 27,000 Newtons 6000 pounds. Provide guy clamps 152 mm 6 inches in length with three 16 mm
5/8 inch bolts, or offset-type guy clamps, or approved guy grips at each guy terminal. Securely clamp plastic
guy marker to the guy or anchor at the bottom and top of marker.Complete anchor and guy installation, dead end
to dead end, and tighten guy before wire stringing and sagging is begun on that line section. [Provide strain
insulators at a point on guy strand 2435 mm 8 feet minimum from the ground and 1825 mm 6 feet minimum from the
surface of pole.] [Effectively ground and bond guys to the system neutral.]
3.1.6 Hardware
Provide hardware with washer against wood and with nuts and lock nuts applied wrench tight. Provide locknuts
on threaded hardware connections. Provide M-F style locknuts and not palnut style.
3.1.7 Grounding
NOTE: For Army projects, specify the grounding configuration and the number
and type of electrodes required. See TM 5-811-1 for guidance. Coordinate with
NFPA 70 and IEEE C2.
Delete the bracketed sentence for Army projects.
Unless otherwise indicated, provide grounding that conforms to IEEE C2 and NFPA 70. [Provide pole grounding
electrodes with a resistance to ground not exceeding 25 ohms. When work in addition to that indicated or specified
is directed in order to obtain specified ground resistance, apply provisions of the contract covering changes.]
3.1.7.1 Grounding Electrode Installation
NOTE: Modify and/or delete paragraphs in accordance with project requirements.
Investigate the soil resistively during the preliminary design phase to determine
the design required to ensure that the grounding values are obtained. For areas
where the water table is low and/or the soil resistively is high (such as volcanic
soils, sand, or rock), delete the additional electrode provisions and provide
a design to meet the site requirements.
Install grounding electrodes as follows:
a. Driven rod electrodes - Unless otherwise indicated, locate ground rods approximately 900
mm 3 feetout from base of the pole and drive into the earth until the tops of the rods are approximately
300 mm 1 foot below finished grade. Evenly space multiple rods at least 3 m 10 feet apart
and connect together 600 mm 2 feet below grade with a minimum No. 6 bare copper conductor.
b. Plate electrodes - Install plate electrodes in accordance with the manufacturer's instructions
and IEEE C2 and NFPA 70.
NOTE: Use the following paragraph for Army projects only.
[c. Ground resistance - Provide a [driven ground rod][plate electrode] with a maximum resistance
that does not exceed 25 ohms under normally dry conditions. Whenever the required ground resistance
is not met, provide additional electrodes [interconnected with grounding conductors][as indicated],
to achieve the specified ground resistance. The additional electrodes are [up to three, [2.4]
[3] m [8] [10] feet rods spaced a minimum of 3 m 10 feetapart][a single extension-type rod,
[15.9] [19.1] mm [5/8] [3/4] inch diameter, up to 9.1 m 30 feet long, [driven perpendicular
to grade] [coupled and driven with the first rod]]. In high ground resistance, use of UL listed
chemically charged ground rods is allowed. If the resultant resistance exceeds 25 ohms measured
not less than 48 hours after rainfall, notify the Contracting Officer immediately.]
3.1.7.2 Grounding Electrode Conductors
NOTE: If grounding details are provided on the drawings, delete the bracketed
information.
[On multi-grounded circuits, as defined in IEEE C2, provide a single continuous vertical grounding electrode
conductor. Bond neutrals, surge arresters, and equipment grounding conductors to this conductor. For single-grounded
or ungrounded systems, provide a grounding electrode conductor for the surge arrester and equipment grounding
conductors and a separate grounding electrode conductor for the secondary neutrals. Staple grounding electrode
conductors to wood poles at intervals not exceeding 600 mm 2 feet. On metal poles, use a preformed galvanized
steel strap, 15.9 mm 5/8 inch wide by 0.853 (22 gauge) 22 gaugeminimum by length, secured by a preformed locking
method standard with the manufacturer, to support a grounding electrode conductor installation on the pole and
space at intervals not exceeding 1.5 m 5 feet with one band not more than 75 mm 3 inches from each end of the
vertical grounding electrode conductor. ]Size grounding electrode conductors as indicated. Connect secondary
system neutral conductors directly to the transformer neutral bushings, then connect with a neutral bonding jumper
between the transformer neutral bushing and the vertical grounding electrode conductor as indicated. Bends greater
than 45 degrees in grounding electrode conductor are not permitted.
3.1.7.3 Grounding Electrode Connections
Make above grade grounding connections on pole lines by exothermic weld or by using a compression connector.
Make below grade grounding connections by exothermic weld. Make exothermic welds strictly in accordance with
manufacturer's written recommendations. Welds which have puffed up or which show convex surfaces indicating
improper cleaning, are not acceptable. No mechanical connectors are required at exothermic weldments. Provide
compression connectors that are the type that uses a hydraulic compression tool to provide correct pressure.
Provide tools and dies recommended by compression connector manufacturer. Provide an embossing die code or similar
method as visible indication that a connector has been fully compressed on ground wire.
3.1.7.4 Grounding and Grounded Connections
a. Where no primary or common neutral exists, bond together surge arresters and frames of equipment
operating at over 750 volts and connect to a dedicated primary grounding electrode.
b. Where no primary or common neutral exists, transformer secondary neutral bushing, secondary
neutral conductor, and bond together frames of equipment operating at under 750 volts and connect
to a dedicated secondary grounding electrode.
c. When a primary or common neutral exists, connect all grounding and grounded conductors to
a common grounding electrode.
3.1.7.5 Protective Molding
Protect grounding conductors which are run on surface of wood poles by PVC molding extending from ground line
throughout communication and transformer spaces.
3.1.8 CONDUCTOR INSTALLATION
3.1.8.1 Line Conductors
NOTE: Do not use bracketed sentence for Navy projects. Instead, provide sag
and tension tables and values indicated on the drawings.
[Unless otherwise indicated, install conductors in accordance with manufacturer's approved tables of sags and
tensions. ]Handle conductors with care necessary to prevent nicking, kinking, gouging, abrasions, sharp bends,
cuts, flattening, or otherwise deforming or weakening conductor or any damage to insulation or impairing its
conductivity. Remove damaged sections of conductor and splice conductor. Provide conductors that are paid out
with the free end of conductors fixed and cable reels portable, except where terrain or obstructions make this
method unfeasible. Make the bend radius for any insulated conductor not less than the applicable NEMA specification
recommendation. Do not draw conductors over rough or rocky ground, nor around sharp bends. When installed by
machine power, provide conductors that are drawn from a mounted reel through stringing sheaves in straight lines
clear of obstructions. Check the initial sag and tension, in accordance with the manufacturer's approved sag
and tension charts, within an elapsed time after installation as recommended by the manufacturer.
3.1.8.2 Connectors and Splices
Provide conductor splices, as installed, that exceed ultimate rated strength of conductor and are of the type
recommended by conductor manufacturer. No splices are permitted within 3050 mm 10 feet of a support. Provide
connectors and splices that are mechanically and electrically secure under tension and are of the nonbolted compression
type. Make splices have a tensile strength of not less than the rated breaking strength of the conductor. Provide
splice materials, sleeves, fittings, and connectors that are noncorrosive and that do not adversely affect conductors.
Wire brush and apply an oxide inhibitor to aluminum-composition conductors before making a compression connection.
Connectors which are factory-filled with an inhibitor are acceptable. Provide types of inhibitors and compression
tools recommended by the connector manufacturer. Provide primary line apparatus taps by means of hot line clamps
attached to compression type bail clamps (stirrups). Provide solderless pressure type low-voltage connectors
for copper conductors. Smoothly tape noninsulated connectors to provide a waterproof insulation equivalent to
the original insulation, when installed on insulated conductors. On overhead connections of aluminum and copper,
install the aluminum above the copper.
3.1.8.3 Conductor-To-Insulator Attachments
Attach conductors to insulators by means of clamps, shoes or tie wires, in accordance with the type of insulator.
For insulators requiring conductor tie-wire attachments, provide tie-wire sizes as specified in TABLE I.
TABLE I
TIE-WIRE REQUIREMENTS
CONDUCTOR TIE WIRE
Copper (AWG) Soft-Drawn Copper (AWG)
6 8
4 and 2 6
1 through 3/0 4
4/0 and larger 2
AAC, AAAC, or ACSR (AWG) AAAC OR AAC (AWG)
Any size 6 or 4
3.1.8.4 Armor Rods
Provide armor rods for AAC, AAAC, and ACSR conductors. Install armor rods at supports, except armor rods are
not required at primary dead-end assemblies if aluminum or aluminum-lined zinc-coated steel clamps are used.
Provide lengths and methods of fastening armor rods in accordance with the manufacturer's recommendations. For
span lengths of less than 61 m, 200 feet, use of flat aluminum armor rods is allowed. Use flat armor rods, not
less than 762.0 micrometers by 6.4 mm 0.03 by 0.25 inch on No. 1 AWG AAC and AAAC and smaller conductors and
on No. 5 AWG ACSR and smaller conductors. On larger sizes, provide flat armor rods that are not less than 1.3
by 7.6 mm. 0.05 by 0.30 inches. For span lengths of 61 m 200 feet or more, use preformed round armor rods.
3.1.8.5 Ties
Provide ties on pin insulators tight against conductor and insulator and ends turned down flat against conductor
so that no wire ends project.
3.1.8.6 Low-Voltage Insulated Cables
Support low-voltage cables on clevis fittings using spool insulators. Provide dead-end clevis fittings and suspensions
insulators where required for adequate strength. Provide dead-end construction that has a strength exceeding
the rated breaking strength of the neutral messenger. Provide clevis attachments with not less than 15.9 mm
5/8 inch through-bolts. Use secondary racks when installed on wood poles and where the span length does not
exceed 61 m 200 feet. Provide two-, three-, or four-wire secondary racks, complete with spool insulators. Provide
racks that meet strength and deflection requirements for heavy-duty steel racks, and are rounded and smooth to
avoid damage to conductor insulation. Hold each insulator in place with a 15.9 mm 5/8 inch button-head bolt
equipped with a nonferrous cotter pin, or equivalent, at the bottom. Provide racks for dead-ending four No.
4/0 AWG or four larger conductors that are attached to poles with three 15.9 mm 5/8 inch through-bolts. Attach
other secondary racks to poles with at least two 15.9 mm 5/8 inch through-bolts. Provide minimum vertical spacing
between conductors of not less than 200 mm 8 inches.
3.1.8.7 Reinstalling Conductors
NOTE: Sag tables are usually available from conductor manufacturers. For projects
which entail considerable length of overhead line, indicate sag tables for the
particular line as designed.
String existing conductors to be reinstalled or resagged to "final" sag table values indicated for the particular
conductor type and size involved.
3.1.8.8 New Conductor Installation
NOTE: Sag tables are usually available from conductor manufacturers. For projects
which entail considerable length of overhead line, indicate sag tables for the
particular line as designed. Use "indicated" on NAVFAC Atlantic projects.
String new conductors to "initial" sag table values [indicated] [recommended by the manufacturer] for conductor
type and size of conductor and ruling span indicated.
3.1.8.9 Fittings
Provide dead end fittings[, clamp or compression type,] that conform to written recommendations of conductor
manufacturer and that develop full ultimate strength of conductor.
3.1.8.10 Aluminum Connections
Make aluminum connections to copper or other material using only splices, connectors, lugs, or fittings designed
for that specific purpose. Keep a copy of manufacturer's instructions for applying these fittings at job site
for use of the inspector.
[3.1.9 Pole Mounted Metering Equipment
3.1.9.1 Primary Meters
Install primary metering transformers [as indicated] [according to manufacturer's drawings]. Make connections
to metering circuits within each transformer conduit connection box.
3.1.9.2 Installing Meter System
Provide metering enclosure that houses kWh meter [and meter test block]. Secure the enclosure to pole at a height
of 1825 mm 6 feet above grade to center of the enclosure. Ground enclosure.
a. Connect meter as indicated.
[b. Connect meter test block between meter and metering transformers to isolate meter for removal,
test or adjustment.]
c. Provide identical phase sequence and color code of potential and current leads. Mark wires
which are connected to transformer terminals identified with polarity marks (dots) by a colored
plastic tape around the wire at each end.
d. No splices are permissible in metering circuits. Provide wire that is trained at sides
and bottom of enclosure back board and secured by plastic wraps.
]3.1.10 Pole Top Switch Installation
Install pole top switch strictly according to manufacturer's installation drawings and information.
3.1.10.1 Operating Handle
Locate approximately 1520 mm 5 feet above ground on field side of pole.
[3.1.11 Recloser
Install recloser(s) strictly in accordance with manufacturer's instructions.
][3.1.12 Sectionalizer
Install sectionalizer(s) strictly in accordance with manufacturer's instructions.
]3.1.13 Risers
[Secure galvanized steel conduits on poles by two hole galvanized steel pipe straps spaced as indicated and within
910 mm 3 feet of any outlet or termination. Ground metallic conduits.] [Secure PVC riser shields on poles
as indicated.]
3.2 TRANSFORMER INSTALLATION
NOTE: Specify phase sequence in accordance with the local practice.
Carefully install transformers so as not to scratch finishes or damage bushings. Install transformers in accordance
with the manufacturer's instructions. After installation, inspect surfaces and touch up scratches with a finish
provided by the transformer manufacturer for this purpose.
[3.3 CROSSARM MOUNTING
NOTE: Do not use this paragraph and subparagraphs for Navy projects. The Navy
provides this information on the drawings. Utilize Navy plates during design
of Navy projects. Refer to "Instructions to view/print graphics" for access
to Navy plates.
NOTE: Normally specify flat braces for 2.4 m (8 foot) crossarms and angle braces
for 3.1 m (10 foot) crossarms to agree with REA construction. An angle brace
is also required on 2.4 m (8 foot) arms where conductors have a breaking strength
of more than 20.0 kN (4500 pounds). Extreme loading conditions also warrants
the extra cost of the stronger angle brace under other circumstances.
Provide metal crossarm braces to reduce the effective BIL rating of the pole.
In high lightning areas specify fiberglass braces.
Consult REA Bulletin 61-10, "Protection of Bald and Golden Eagles from Power
lines." Verify the requirement for wooden crossarm braces for each state and
land area in accordance with the Bald Eagle Protection Act of 1940, (16 U.S.C.
703 et seq.) as amended; Endangered Species Act of 1973 (87 Stat. 1064); and
Migratory Bird Treaty of 1918 (16 U.S.C 703 et. seq.) as amended. Potential
requirement sources are the Bureau of Land Management, U.S. Department of the
Interior, and Federal, State, and Local Land Management or Wildlife Conservation
Agencies.
Bolt crossarms to poles with 15.9 mm 5/8 inchthrough-bolts with square washers at each end. Extend bolts not
less than 3 mm 1/8 inch nor more than 50 mm 2 inches beyond nuts. On single crossarm construction, install the
bolt head on the crossarm side of the pole. Provide [fiberglass] [metal] [wood] crossarm braces on crossarms.
Provide flat braces for 2.4 m 8 foot crossarms 6.4 by 31.8 mm, 1/4 by 1-1/4 inches, not less than 700 mm 28
inches in length. Bolt flat braces to arms with 9.5 mm 3/8 inch carriage bolts with round or square washers
between boltheads and crossarms, and secure to poles with 50.8 by 101.6 mm 1/2 by 4 inch lag screws after crossarms
are leveled and aligned. Angle braces are required for 3.1 m 10 foot crossarms. Provide angle braces that are
1.5 m 60 inch span by 457.2 mm 18 inch drop formed in one piece from 38.1 by 38.1 by 4.8 mm 1-1/2 by 1-1/2 by
3/16 inch angle. Bolt angle braces to crossarms with 50.8 mm 1/2 inch bolts with round or square washers between
boltheads and crossarms, and secure to poles with 15.9 mm 5/8 inch through-bolts. Securely hold double crossarms
in position by means of 15.9 mm 5/8 inch double-arming bolts. Equip each double-arming bolt with four nuts and
four square washers.
3.3.1 Line Arms and Buck Arms
Provide line arms and buck arms that are set at right angles to lines for straight runs and for angles 45 degrees
and greater; and line arms that bisect angles of turns of less than 45 degrees. Use dead-end assemblies for
turns where shown. Install buck arms, as shown, at corners and junction poles. Provide double crossarms at
ends of joint use or conflict sections, at dead-ends, and at angles and corners to provide adequate vertical
and longitudinal strength. Provide double crossarms at each line-crossing structure and where lines not attached
to the same pole cross each other.
3.3.2 Equipment Arms
Set equipment arms parallel or at right angles to lines as required to provide climbing space. Locate equipment
arms below line construction to provide necessary wire and equipment clearances.
]3.4 FIELD APPLIED PAINTING
Paint electrical equipment as required to match finish of adjacent surfaces or to meet the indicated or specified
safety criteria. Provide painting as specified in Section 09 90 00 PAINTS AND COATINGS.
3.5 FIELD FABRICATED NAMEPLATE MOUNTING
Provide number, location, and letter designation of nameplates as indicated. Fasten nameplates to the device
with a minimum of two sheet-metal screws or two rivets.
3.6 FIELD QUALITY CONTROL
NOTE: Select types to suit project conditions and delete all others. Delete
all paragraphs not applicable. Tests must be justified.
3.6.1 General
[Perform field testing in the presence of the Contracting Officer. ]Notify the Contracting Officer [_____] days
prior to conducting tests. Furnish materials, labor, and equipment necessary to conduct field tests. Perform
tests and inspections recommended by the manufacturer unless specifically waived by the Contracting Officer.
Maintain a written record of tests which includes date, test performed, personnel involved, devices tested,
serial number and name of test equipment, and test results. Sign and date field reports.
3.6.2 Safety
Provide and use safety devices such as rubber gloves, protective barriers, and danger signs to protect and warn
personnel in the test vicinity. Replace any devices or equipment which are damaged due to improper test procedures
or handling.
3.6.3 Medium-Voltage Preassembled Cable Test
NOTE: If the installation is tapping a new feeder to an existing feeder using
a "T" splice, modify the paragraph to indicate that when existing cable cannot
be readily disconnected, only test the system to the lower (after installation)
voltage. Delete the test if no cable is installed in the project.
After installation, prior to connection to an existing system, and before the operating test, give the medium-voltage
preassembled cable system a high potential test. Apply direct-current voltage on each phase conductor of the
system by connecting conductors at one terminal and connecting grounds or metallic shieldings or sheaths of the
cable at the other terminal for each test. Prior to the test, isolate the cables by opening applicable protective
devices and disconnecting equipment. Provide the method, voltage, length of time, and other characteristics
of the test for initial installation in accordance with NEMA WC 74 for the particular type of cable installed,
and do not exceed the recommendations of IEEE Std 404 for cable joints unless the cable and accessory manufacturers
indicate higher voltages are acceptable for testing. For any cable that fails due to a weakness of conductor
insulation or due to defects or injuries incidental to the installation or because of improper installation of
cable, cable joints, terminations, or other connections, make necessary repairs or replace cables as directed.
Retest repaired or replaced cables.
3.6.4 Sag and Tension Test
Give the Contracting Officer prior notice of the time schedule for stringing conductors or cables serving overhead
medium-voltage circuits. The Contracting Officer reserves the right to witness the procedures used for ascertaining
that initial stringing sags and tensions are in compliance with requirements for the applicable loading district
and cable weight.
3.6.5 Low-Voltage Cable Test
NOTE: The insulation resistance test (dielectric test) value is based on the
recommendation contained in IEEE Std 525. Delete the cable test if no low voltage
cables are in the project.
For underground secondary or service laterals from overhead lines, provide the low-voltage cable, complete with
splices, that is tested for insulation resistance after the cables are installed, in their final configuration,
ready for connection to the equipment, and prior to energization. The 500 volts dc test voltage, applied for
one minute between each conductor and ground and between all possible combinations of conductors in the same
trench, duct, or cable, with other conductors in the same trench, duct, or conduit. Provide insulation with
a minimum value of:
R in megohms = (rated voltage in kV + 1) x 304,800/(length of cable in meters)R in megohms = (rated voltage in
kV + 1) x 1000/(length of cable in feet)
Repair or replace each cable failing this test. Retest the repaired cable then until failures have been eliminated.
3.6.6 Pre-Energization Services
Perform the following services on the equipment listed below. Perform these services subsequent to testing but
prior to the initial energization. Inspect the equipment to insure that installation is in compliance with the
recommendations of the manufacturer and as shown on the detail drawings. Inspect terminations of conductors
at major equipment to ensure the adequacy of connections. Inspect bare and insulated conductors between such
terminations to detect possible damage during installation. If factory tests were not performed on completed
assemblies, perform tests after the installation of completed assemblies. Inspect components for damage caused
during installation or shipment and to ensure that packaging materials have been removed. Provide components
capable of being both manually and electrically operated that are operated manually prior to the first electrical
operation. Provide components capable of being calibrated, adjusted, and tested and calibrate, adjust and test
in accordance with the instructions of the equipment manufacturer. Items for which such services are provided,
but are not limited to, are the following:
Capacitors.
Switches.
3.6.7 Performance of Acceptance Checks and Tests
Perform in accordance with the manufacturer's recommendations and include the following visual and mechanical
inspections and electrical tests, performed in accordance with NETA ATS.
3.6.7.1 Overhead-Type Distribution Transformers
a. Visual and mechanical inspection
(1) Compare equipment nameplate information with specifications and approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench
method. Thermographic survey is not required.
(4) Perform specific inspections and mechanical tests as recommended by manufacturer.
(5) Verify correct equipment grounding.
b. Electrical tests
NOTE: Coordinate the option on series-multiple voltage-changing switch with
the option in paragraph entitled "Transformers (Overhead-Type Distribution)"
herein.
[(1) Insure that the series-multiple voltage-changing switch is in the correct position. Transformers
are normally shipped in the series position.]
(2) Perform insulation-resistance tests.
(3) Perform continuity test.
(4) Set tap changer to provide a secondary voltage of [120/240] [120/208] [_____].
3.6.7.2 Pole Top Interrupter Switch
a. Visual and Mechanical Inspection
(1) Compare equipment nameplate information with specifications and approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Verify appropriate equipment grounding.
(4) Perform mechanical operator tests in accordance with manufacturer's instructions.
(5) Verify correct blade alignment, blade penetration, travel stops, arc interrupter operation,
and mechanical operation.
b. Electrical Tests
(1) Perform insulation-resistance tests.
(2) Perform dc over-potential tests.
(3) Perform contact-resistance tests across each switch blade.
[3.6.7.3 Reclosers
a. Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Inspect alignment and grounding.
(4) Perform mechanical operation and contact alignment tests on both the recloser and its operating
mechanism in accordance with manufacturer's instructions.
(5) Verify tightness of accessible bolted electrical connections.
(6) Inspect for correct insulating liquid level.
b. Electrical Tests
(1) Perform resistance measurements through all bolted connections with low-resistance ohmmeter.
(2) Perform a contact resistance test
(3) Sample insulating liquid. Test sample for:
(a) Dielectric breakdown voltage
(b) Color
(c) Visual condition
(4) Test protective functions.
[(5) Perform vacuum bottle integrity test (overpotential) across each vacuum bottle with the
recloser in the open position in strict accordance with manufacturer's instructions.]
(6) Perform overpotential tests.
(7) Determine time delay for each programmed reclosing interval.
(8) Verify lockout for unsuccessful reclosing.
(9) Determine reset time.
(10) Verify instantaneous overcurrent lockout.
][3.6.7.4 Sectionalizers
a. Visual and Mechanical inspection
(1) Compare equipment nameplate data with approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Inspect alignment and grounding.
(4) Perform mechanical operation and contact alignment tests on both the sectionalizer and
its operating mechanism in accordance with manufacturer's instructions.
(5) Verify tightness of accessible bolted electrical connections.
(6) Inspect for correct insulating liquid level.
b. Electrical Tests
(1) Perform resistance measurements through all bolted connections with low-resistance ohmmeter.
(2) Perform a contact resistance test.
(3) Sample insulating liquid. Test sample for:
(a) Dielectric breakdown voltage
(b) Color
(c) Visual condition
(4) Perform overpotential tests.
(5) Test sectionalizer counting function.
(6) Test sectionalizer lockout function.
(7) Test for reset timing on trip actuator.
][3.6.7.5 Potential Transformers
a. Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and approved shop drawings.
(2) Verify correct connection.
(3) Verify that adequate clearances exist between primary and secondary circuit wiring.
(4) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench
method.
(5) Verify that all required grounding and shorting connections provide good contact.
(6) Verify correct fuse sizes.
b. Electrical Tests
(1) Perform resistance measurements through all bolted connections with low-resistance ohmmeter
(2) Perform insulation-resistance tests.
(3) Perform polarity tests.
(4) Perform turns-ratio tests.
][3.6.7.6 Current Transformers
a. Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Verify correct connection.
(4) Verify tightness of accessible bolted electrical connections by calibrated torque-wrench
method.
(5) Verify that all required grounding and shorting connections provide good contact.
b. Electrical Tests
(1) Perform resistance measurements through all bolted connections with low-resistance ohmmeter
(2) Perform insulation-resistance tests.
(3) Perform polarity tests.
(4) Perform ratio-verification tests.
][3.6.7.7 Metering
a. Visual and Mechanical Inspection
(1) Compare equipment nameplate data with specifications and approved shop drawings.
(2) Inspect physical and mechanical condition.
(3) Verify tightness of electrical connections.
b. Electrical Tests
(1) Verify accuracy of meters at 25 percent, 50 percent, 75 percent, and 100 percent of full
scale.
(2) Calibrate watthour meters according to manufacturer's published data.
(3) Verify all instrument multipliers.
]3.6.7.8 Grounding System
a. Visual and mechanical inspection
(1) Inspect ground system for compliance with contract plans and specifications.
b. Electrical tests
(1) Perform ground-impedance measurements utilizing the fall-of-potential method. On systems
consisting of interconnected ground rods, perform tests after interconnections are complete.
On systems consisting of a single ground rod perform tests before any wire is connected. Take
measurements in normally dry weather, not less than 48 hours after rainfall. Use a portable
ground testing megger in accordance with manufacturer's instructions to test each ground or
group of grounds. Provide an instrument that is equipped with a meter reading directly in ohms
or fractions thereof to indicate the ground value of the ground rod or grounding systems under
test.
3.6.8 Devices Subject to Manual Operation
Operate each device subject to manual operation at least three times, demonstrating satisfactory operation each
time.
3.6.9 Follow-Up Verification
Upon completion of acceptance checks and tests, show by demonstration in service that circuits and devices are
in good operating condition and properly performing the intended function. As an exception to requirements stated
elsewhere in the contract, give the Contracting Officer 5 working days advance notice of the dates and times
of checking and testing.