USACE / NAVFAC / AFCESA / NASA UFGS-26 54 21.00 10 (October 2007)
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Preparing Activity: USACE Superseding
UFGS-26 54 21.00 10 (April 2006)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated January 2009
SECTION 26 54 21.00 10
HELIPAD LIGHTING AND VISUAL NAVIGATION AIDS
10/07
NOTE: This guide specification covers the requirements for lighting and visual
navigation aids for helipads.
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 and should
be directed to the technical proponent of the specification. A listing of technical
proponents, including their organization designation and telephone number, is
on the Internet.
Recommended changes to a UFGS should be submitted as a Criteria Change Request
(CCR).
PART 1 GENERAL
NOTE: If mission on an existing facility is to be operational during construction,
a scheduling plan properly coordinated with the airfield or heliport users should
be developed and included as part of the bid package. Maximum outage time allowed
should be specified for critical lighting, visual navigational aids and utility
systems. Minimum advance notice (48 hrs, 72 hrs, etc.) for proposed outages
should be specified. Consider transfer of control from the control tower to
the alternate control point (vault) to maintain the mission for limited times
during construction and to minimize mission disruption and potential cost growth
during construction. If this is not possible, the scheduling can be delegated
to the construction phase of the project by inserting the following text in
Part 1.
"Existing [helipad] [airfield] [or heliport] lighting systems must remain in
operating condition except for minimum interruptions, as approved in writing
by the Contracting Officer. Prior to each interruption, all necessary materials
and a sufficient labor force will be assembled to permit completing the work
within the scheduled time interval. Under no circumstances will any of the
existing airfield, heliport, or helipad lighting circuits be left inoperative
without making provisions for suitable temporary connections in the affected
area or areas. All airfield, heliport, or helipad lighting circuits covered
under this contract must be restored in such a manner that they will be operational
at dusk each day. The Contractor must submit plan for outages and maintaining
lighting and lighting control."
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.
[ASSOCIATION OF EDISON ILLUMINATING COMPANIES (AEIC)AEIC CS8(2000) Extruded Dielectric Shielded Power Cables Rated 5 Through 46 kV][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 780(2001; R 2006) Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized CoatingsASTM B 117(2007a) Standing Practice for Operating Salt Spray (Fog) ApparatusASTM D 1248(2005) Standard Specification for Polyethylene Plastics Extrusion Materials for Wire and CableASTM D 1654(2008) Evaluation of Painted or Coated Specimens Subjected to Corrosive EnvironmentsASTM D 709(2001; R 2007) Laminated Thermosetting Materials][FM GLOBAL (FM)FM P7825a(2005) Approval Guide Fire ProtectionFM P7825b(2005) Approval Guide Electrical Equipment][INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)IEEE C2(2007; Errata 2007; INT 2008) National Electrical Safety CodeIEEE C57.12.50(1981; R 1998) Sealed Dry-Type Distribution Transformers 1 to 500 kVA, Single-Phase; and 15 to 500 kVA, Three-Phase with High-Voltage 601 to 34 500 Volts, Low-Voltage 120 to 600 VoltsIEEE C62.11(2005; Amendment A 2008) Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1kV)IEEE C62.41.1(2002) IEEE Guide on the Surges Environment in Low-Voltage (1000 V and Less) AC Power CircuitsIEEE C62.41.2(2002) IEEE Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power CircuitsIEEE Std 48(1996; R 2003) Test Procedures and Requirements for Alternating-Current Cable Terminations 2.5 kV through 765 kV][NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)NEMA 250(2003) Enclosures for Electrical Equipment (1000 Volts Maximum)NEMA AB 1(2002) Molded-Case Circuit Breakers, Molded Case Switches, and Circuit-Breaker EnclosuresNEMA C119.1(2006) Sealed Insulated Underground Connector Systems Rated 600 VoltsNEMA ICS 2(2000; Errata 2002; R 2005; Errata 2006) Standard for Industrial Control and Systems: Controllers, Contractors, and Overload Relays Rated Not More than 2000 Volts AC or 750 Volts DC: Part 8 - Disconnect Devices for Use in Industrial Control EquipmentNEMA ICS 6(1993; R 2006) Standard for Industrial Controls and Systems EnclosuresNEMA PB 1(2006; Errata 2008) Standard for PanelboardsNEMA RN 1(2005) Standard for Polyvinyl Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal ConduitNEMA TC 2(2003) Standard for Electrical Polyvinyl Chloride (PVC) Tubing and ConduitNEMA TC 3(2004) Standard for Polyvinyl Chloride PVC Fittings for Use With Rigid PVC Conduit and TubingNEMA TC 6 & 8(2003) Standard for Polyvinyl Chloride PVC Plastic Utilities Duct for Underground Installations][NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)NFPA 70(2007; AMD 1 2008) National Electrical Code - 2008 Edition][THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)SSPC Paint 20(2002; E 2004) Paint Specification No. 20 Zinc-Rich Coating Type I Inorganic and Type II Organic][U.S. DEPARTMENT OF AGRICULTURE (USDA)RUS Bull 345-67(1998) REA Specification for Filled Telephone Cables, PE-39][U.S. FEDERAL AVIATION ADMINISTRATION (FAA)FAA 6850.19(1978) Frangible CouplingFAA AC 150/5345-10(Rev F) Constant Current Regulators Regulator MonitorsFAA AC 150/5345-12(Rev E) Airport and Heliport BeaconFAA AC 150/5345-13(Rev A) L-841 Auxiliary Relay Cabinet Assembly for Pilot Control of Airport Lighting CircuitsFAA AC 150/5345-26(Rev C) L-823 Plug and Receptacle, Cable ConnectorsFAA AC 150/5345-27(Rev D) Wind Cone AssembliesFAA AC 150/5345-28(Rev F) Precision Approach Path Indicator (PAPI) SystemsFAA AC 150/5345-3(Rev E) L-821 Panels for Control to Airport LightingFAA AC 150/5345-42(Rev F) Airport Light Bases, Transformer Houses, Junction Boxes and AccessoriesFAA AC 150/5345-43(Rev F) Obstruction Lighting EquipmentFAA AC 150/5345-46(Rev C) Runway and Taxiway Light FixturesFAA AC 150/5345-47(Rev B) Isolation Transformers for Airport Lighting SystemsFAA AC 150/5345-5(Rev B) Circuit Selector SwitchFAA AC 150/5345-7(Rev E) L-824 Underground Electrical Cable for Airport Lighting CircuitsFAA AC 150/5370-10(Rev B) Specifying Construction of AirportsFAA AC 70/7460-1(Rev K) Obstruction Marking and LightingFAA E-2519(Rev A) Types I and IIFAA E-982(Rev H; Notice 1) PAR-56 Lampholder][UNDERWRITERS LABORATORIES (UL)UL 1(2005; Rev thru Jul 2007) Standard for Flexible Metal ConduitUL 1242(2006; Rev thru Jul 2007) Standard for Electrical Intermediate Metal Conduit -- SteelUL 360(2003; Rev thru Jul 2007) Liquid-Tight Flexible Steel ConduitUL 44(2005; Rev thru Nov 2005) Thermoset-Insulated Wires and CablesUL 486A-486B(2003; Rev thru Aug 2006) Standard for Wire ConnectorsUL 489(2002; Rev thru Jun 2006) Standard for Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker EnclosuresUL 510(2005; Rev thru Aug 2005) Polyvinyl Chloride, Polyethylene, and Rubber Insulating TapeUL 514A(2004; Rev thru Aug 2007) Standard for Metallic Outlet BoxesUL 6(2007) Standard for Electrical Rigid Metal Conduit-SteelUL 797(2007) Standard for Electrical Metallic Tubing -- SteelUL 83(20086) Standard for Thermoplastic-Insulated Wires and CablesUL 854(2004; Rev thru Oct 2007) Service-Entrance CablesUL Electrical Constructn(2008) Electrical Construction Equipment Directory]1.2 SYSTEM DESCRIPTION
a. The helipad lighting and visual navigation aids shall consist of [helipad perimeter lights,] [helipad
marking,] [floodlights,] [in-pavement lights,] [[landing direction lights] and approach direction lights,]
[obstruction lights and markings,] [beacon,] [wind direction indicator,] [visual glide slope indicator,]
[[hoverlane lights] and markings,] [approach lighting system,] [refueling area lights,] [[helipad lighting
power supply,] [and controls]] and [_____] as indicated on the contract Drawings.
b. Reports of inspections for the counterpoise system and other required inspections shall be prepared
and provided to the Contracting Officer as each stage of installation is completed. These reports shall
identify the activity by contract number, location, quantity of material placed, and compliance with
requirements.
1.3 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.] [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:
SD-02 Shop Drawings
Lighting and Visual Navigation Aids
Composite drawings showing coordination of work of one trade with that of other trades and
with the structural and architectural elements of the work. Drawings shall be in sufficient
detail to show overall dimensions of related items, clearances, and relative locations of work
in allotted spaces. Drawings shall indicate where conflicts or clearance problems exist between
the various trades.
As-Built Drawings
Drawings, as specified.
SD-03 Product Data
Materials and Equipment
1) A complete itemized listing of equipment and materials proposed for incorporation into
the work; each itemization shall include an item number, the quantity of items proposed, and
the name of the manufacturer.
2) Data composed of catalog cuts, brochures, circulars, specifications and product data, and
printed information in sufficient detail and scope to verify compliance with requirements of
the contract documents shall be included.
Protection Plan
Protection plan as specified.
Training
Requirements of training shall be provided [_____] weeks before training is scheduled to begin.
Posted Instructions[; G][; G, [_____]]
Proposed diagrams, instructions, and other sheets shall be submitted prior to posting.
SD-06 Test Reports
Field Quality Control
Notification to Contracting Officer prior to testing, as specified.
Final Operating Test
Upon completion and testing of the installed system, performance test reports are required
in booklet form showing all field tests performed to adjust each component and all field tests
performed to provide compliance with the specified performance criteria. Each test shall indicate
the final position of controls.
Inspections
Inspection reports, as specified.
SD-07 Certificates
Qualifications
Certified documentation of qualifications, as specified.
Materials and Equipment
When equipment or materials are specified to conform to the standards or publications and
requirements of AASHTO, ANSI, ASTM, AEIC, FM, IEEE, IES, NEMA, NFPA, or UL, or to an FAA, FS,
or MS, proof that the items furnished under this section conform to the specified requirements
shall be included. The label or listing in UL Electrical Constructn or in FM P7825a, FM P7825b
or the manufacturer's certification or published catalog specification data statement that
the items comply with applicable specifications, standards, or publications and with the manufacturer's
standards will be acceptable evidence of such compliance. Certificates shall be prepared by
the manufacturer when the manufacturer's published data or drawings do not indicate conformance
with other requirements of these specifications.
SD-10 Operation and Maintenance Data
Operation and Maintenance Procedures
[Six] [_____] copies of operation and [six] [_____] copies of maintenance manuals are required
for the equipment furnished. One complete set shall be furnished prior to performance testing
and the remainder shall be furnished upon acceptance. Operating manuals shall detail the step-by-step
procedures required for system startup, operation, and shutdown. Operating manuals shall include
the manufacturer's name, model, number, parts list, and brief description of all equipment and
their basic operating features. Maintenance manuals shall list routine maintenance procedures,
possible breakdowns and repairs, and troubleshooting guides. Maintenance manuals shall include
conduit and equipment layout and simplified wiring and control diagrams of the system as installed.
1.4 QUALITY ASSURANCE
1.4.1 Qualifications
a. The Contractor shall submit certification containing the names and the qualifications of persons
recommended to perform the splicing and termination of medium-voltage cables, approved for installation
under this contract. The certification shall indicate that any person recommended to perform actual
splicing and termination has been adequately trained in the proper techniques and has had at least 3
recent years of experience in splicing and terminating the same or similar types of cables approved for
installation. Any person recommended by the Contractor may be required to perform a dummy or practice
splice and termination, in the presence of the Contracting Officer, before being approved as a qualified
installer of medium-voltage cables. If that additional requirement is imposed, the Contractor shall
provide short sections of the approved types of cables with the approved type of splice and termination
kits, and detailed manufacturer's instruction for the proper splicing and termination of the approved
cable types. The certification shall be prepared in conformance with the SPECIAL CONTRACT REQUIREMENTS,
and shall be accompanied by satisfactory proof of the training and experience of persons recommended
by the Contractor as cable installers.
b. The SF sub 6 gas pressurized cable and conduit system installer shall be trained and certified in
installation of this type of system and approved by the manufacturer of the system.
c. The Contractor shall submit [_____] copies of qualified procedures and lists of names and identification
symbols of qualified welders and welding operators prior to welding operations.
1.4.2 Code Compliance
The installation shall comply with the requirements and recommendations of NFPA 70 and IEEE C2 and local codes
where required.
1.4.3 Protection Plan
The Contractor shall submit detailed procedures to prevent damage to existing facilities or infrastructures.
If damage does occur, procedures shall address repair and replacement of damaged property at the Contractor's
expense.
1.4.4 Prevention of Corrosion
1.4.4.1 Metallic Materials
Metallic materials shall be protected against corrosion as specified. Aluminum shall not be used in contact
with earth or concrete. Where aluminum conductors are connected to dissimilar metal, suitable fittings shall
be used.
1.4.4.2 Ferrous Metal Hardware
Ferrous metal hardware shall be hot-dip galvanized in accordance with ASTM A 123/A 123M and ASTM A 153/A 153M
.
1.4.4.3 Luminaries Fabricated from Ferrous Metals
Luminaries fabricated from ferrous metals, unless hot-dip galvanized or of porcelain enamel finish shall be factory
finished with a weather-resistant finish in accordance with paragraphs FACTORY COATING and FINISHING, except
exposure shall be 200 hours. Finish color shall be the manufacturer's standard, unless otherwise indicated.
1.4.5 As-Built Drawings
The Contractor shall submit as-built drawings that provide current factual information including deviations from,
and amendments to the drawings and changes in the work, concealed and visible, shall be provided as instructed.
The as-built drawings shall show installations with respect to fixed installations not associated with the systems
specified herein. Cable and wire shall be accurately identified as to direct-burial or in conduit and shall
locate the connection and routing to and away from bases, housings, and boxes.
1.5 PROJECT/SITE CONDITIONS
Items furnished under this section shall be specifically suitable for the following unusual service conditions:
1.5.1 Altitude
Any equipment shall be suitable for operation up to an altitude of [3,000 m 9850 feet] [_____].
1.5.2 Other
All materials or equipment to be installed [underground]; [in handholes, manholes, or underground vaults]; [or]
[in light bases], [_____] shall be suitable for submerged operation.
PART 2 PRODUCTS
2.1 STANDARD PRODUCT
Provide material and equipment which are a standard product of a manufacturer regularly engaged in the manufacture
of the product and that essentially duplicate items that have been in satisfactory use for at least 2 years prior
to bid opening. Items of the same classification shall be identical including equipment, assemblies, parts,
and components.
2.2 MATERIALS
Equipment and materials shall be new unless indicated or specified otherwise. Materials and equipment shall
be labelled when approved by Underwriters Laboratories (UL) or Factory Mutual (FM) System. Askarel and insulating
liquids containing polychlorinated biphenyls (PCB's) will not be allowed in any equipment. Equipment installed
below grade in vaults, manholes, and handholes shall be the submersible type.
2.2.1 Nameplates
Each major component of equipment shall have as a minimum the manufacturer's name, address, and catalog or style
number on a nameplate securely attached to the item of equipment. Laminated plastic nameplates shall be provided
for equipment, controls, and devices to identify function, and where applicable, position. Nameplates shall
be 3.2 mm 1/8 inch thick laminated cellulose paper base phenolic resin plastic conforming to ASTM D 709, sheet
type, grade ES-3, white with black center core. Surface shall be a matte finish with square corners. Lettering
shall be engraved into the black core. Size of nameplates shall be 25.4 by 63.5 mm 1 by 2-1/2 inches minimum
with minimum 6.4 mm 1/4 inch high normal block lettering. Nameplates shall be provided as indicated. Nameplates
shall be fastened to the device with a minimum of two sheet metal screws or two rivets.
2.2.2 Electrical Tape
Electrical tape shall be UL 510 plastic insulating tape.
2.2.3 Conduit, Conduit Fittings, and Boxes
2.2.3.1 Rigid Steel or Intermediate Metal Conduit (IMC) and Fittings
The metal conduit and fittings shall be UL 6 and UL 1242, respectively, coated with a polyvinylchloride (PVC)
sheath bonded to the galvanized exterior surface, nominal 1.0 mm 40 mils thick, conforming to NEMA RN 1.
2.2.3.2 Flexible Metal Conduit
Flexible metal conduit shall be UL 1, zinc-coated steel. Use UL 360 liquid-tight flexible metal conduit in wet
locations.
2.2.3.3 Outlet Boxes for Use with Steel Conduit, Rigid or Flexible
These outlet boxes shall be UL 514A, cast metal with gasket closures.
2.2.3.4 Plastic Duct for Concrete Encased Burial
These ducts shall be [PVC conforming to NEMA TC 6 & 8, Type EB] [provided as specified in Section
33 70 02.00 10, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND].
2.2.3.5 Plastic Conduit for Direct Burial
This plastic conduit shall be [PVC conforming to NEMA TC 2 (conduit) and NEMA TC 3 (fittings) Type [EPC-40 PVC]
[EPC-80 PVC]] [provided as specified in Section 33 70 02.00 10, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND].
2.2.3.6 Frangible Couplings and Adapters
These frangible couplings shall be in accordance with FAA 6850.19 and FAA E-2519. Provide upper section of frangible
coupling with one of the following:
a. Unthreaded for slip-fitter connections.
b. 61.1 mm 2-13/32 inch - 16N-1A modified thread for nut and compression ring to secure 50 mm 2 inch
EMT.
c. 50 mm 2 inch - 11 1/2-N.P.T. (tapered) with 5.6 mm 7/32 inch nominal wall thickness to accept rigid
conduit coupling.
d. Frangible Couplings for specialized applications as approved.
e. Electrical Metallic Tubing UL 797 where indicated for use with frangible couplings and adapters.
2.2.4 Wire and Cable
Conductors shall be copper except as otherwise indicated.
2.2.4.1 Conductor Sizes
Conductor size shall conform to American Wire Gauge (AWG) and NFPA 70for minimum size. Conductor sizes larger
than No. 8 AWG shall be stranded. No. 8 AWG and smaller may be solid or stranded unless otherwise indicated.
2.2.4.2 Low Voltage Wire and Cable
NOTE: Type THW insulation can only be obtained in large quantity. Use of this
type insulation is not recommended for small projects. Wire with "W" in the
type is usually acceptable for wet locations.
Use [UL 854, Type USE, 600 volts for underground low voltage power cables.] Use [UL 83, Type [_____] [THW] [THWN]]
[UL 44, Type [XHHW] [_____]] for secondary series lighting circuits to be installed in pavement.
2.2.4.3 Power Cables for Use in Helipad Lighting
Power cables for use in Helipad Lighting shall be [rated [5] [_____] kV,] [133 percent] [_____] insulation level,
with shield and jacket provided as specified in Section 33 70 02.00 10, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND.
2.2.4.4 Wire and Cable for Helipad Lighting Systems
NOTE: FAA AC 150/5345-7 covers Type A (rubber), Type B (ethylene-propylene),
and Type C (crosslinked polyethylene) cable. Each type has 600-volt and 5000-volt
ratings with single and multiple conductors. Type A and B have overall jackets
while C only has the overall jacket for the multiple conductor cables. Type
C is recommended for single conductor cable. If soil conditions require a jacketed
cable for protection of insulation, specify Type B.
a. Helipad lighting cable shall be [FAA AC 150/5345-7, Type L-824, for crosslinked polyethylene Type
C] [_____] [600] [5000]-volt cable. Series airfield lighting cable shall be unshielded. Lighting cable
for multiple type lighting circuits shall be [shielded] [unshielded].
b. Cable for pavement slot installation shall be [UL 83 Type [THWN] [THW]] [UL 44 Type XHHW], except
as indicated otherwise.
c. Counterpoise Wire. No. [4] [_____] AWG bare stranded copper, annealed or soft drawn.
d. Control Cable. [Multiconductor type for 120 V ac control, rated 600 volts, No. 12 AWG, and conforming
to the following unless indicated otherwise. Conductors shall be color coded. The cable shall have
an overall jacket of [heavy-duty neoprene] [_____] rated for direct burial. Cable shall conform to FAA AC 150/5345-7
, Type [A] [B] [or] [C]]. [For 48 V dc control, multiconductor, 300 volts No. 19 AWG, conforming to
RUS Bull 345-67] [_____].
e. Fused Cable Connectors. Provide connector consisting of a line- side receptacle and a load side
plug, each in a molded rubber form and including crimp-on fittings for the cable ends to accommodate
a 250-volt cartridge-type fuse. Provide fuse with rating indicated. Provide connectors in kit form
properly sized for the specific cable diameter involved. Completed connection shall be watertight.
2.2.4.5 Cable Tags
Cable tags for each cable or wire shall be installed at duct entrances entering or leaving manholes, handholes,
and at each terminal within the lighting vault. Cable tags shall be stainless steel, bronze, lead strap, or
copper strip, approximately 1.6 mm 1/16 inch thick or hard plastic 3.2 mm 1/8 inch thick suitable for immersion
in salt water and impervious to petroleum products and shall be of sufficient length for imprinting the legend
on one line using raised letters. Cable tags shall be permanently marked or stamped with letters not less than
6.4 mm 1/4 inch in height as indicated. Two-color laminated plastic is acceptable. Plastic tags shall be dark
colored with markings of light color to provide contrast so that identification can be easily read. Fastening
material shall be of a type that will not deteriorate when exposed to water with a high saline content and to
petroleum products.
2.2.4.6 Concrete Markers for Direct Buried Cable Systems
Concrete markers shall be as specified in Section 33 70 02.00 10, ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND.
2.2.5 Ground Rods
Ground rods shall be sectional copper-clad steel with diameter adequate to permit driving to full length of the
rod, but not less than 19.1 mm3/4 inch in diameter and 3.048 m 10 feetlong, unless indicated otherwise.
2.2.6 Lightning Arresters
These lightning arresters shall be in accordance with IEEE C62.11, IEEE C62.41.1 and IEEE C62.41.2 as applicable
with ratings as indicated.
2.2.7 Cable Connectors and Splices
Cable connectors in accordance with FAA AC 150/5345-26, Item L-823 shall be used for connections and splices
appropriate for the type of cable. Other types of cable connectors and splices shall be 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. For FAA Type L-824 lighting cable, connectors shall
be FAA AC 150/5345-26, Type L-823.
2.2.8 Transformers
NOTE: Occasionally, power transformers will be needed to support helipad systems.
Prepare this paragraph as necessary to suit the specific helipad installation.
2.2.8.1 Encapsulated Isolating Transformers
These transformers shall be FAA AC 150/5345-47, Type L-830. Each transformer shall be provided with rating as
indicated on the contract drawings.
2.2.8.2 Power Transformers
These transformers shall be in accordance with [IEEE C57.12.50] [_____] as indicated.
2.2.9 Light Bases
NOTE: Use Type L-867 bases for applications not subject to aircraft or vehicle
loading. Use Type L-868 bases for applications subjected to aircraft or vehicle
loading. Use Type L-869 as a junction box in all pavements.
Light bases shall be FAA AC 150/5345-42 Type [L-867] [L-868] [L-869] [_____]. Steel bases, Class 1, Size [A]
[B] [C] shall be provided as indicated or as required to accommodate the fixture or device installed thereon
if diameter is not shown. Base plates, cover plates, and adapter plates shall be provided to accommodate various
sizes of fixtures. Bolts shall be stainless steel.
2.2.10 Sealant for Fixtures and Wires in Drilled Holes or Saw Kerfs
The sealant shall be in accordance with FAA AC 150/5370-10, Type P-606. Use FAA AC 150/5370-10, Type P-606 sealant
for use in asphaltic concrete (AC) or Portland cement concrete (PCC) pavement compatible with AC pavement and
having a minimum elongation of 50 percent. Formulations of Type P-606 which are compatible with PCC pavement
only are prohibited.
2.2.11 Constant Current Regulator
The regulator shall be FAA AC 150/5345-10, Type L-828, [with] [without] monitor system and with ratings as indicated.
[Regulators shall operate on [60] [50] Hz, have internal primary switch [included] [excluded], have input voltage
of [240] [480] [2400] [_____] and be controlled by 120-volt external control voltage. [Three] [Five] [Indicated
number of] brightness steps shall be provided]. [Monitors shall be provided as indicated.]
2.2.12 Lamps and Filters
Lamp shall be of size and type indicated, or as required by fixture manufacturer for each lighting fixture required
under this contract. Filters shall be as indicated and conforming to the specification for the light concerned
or to the standard referenced.
2.2.13 Sump Pumps for Manholes and Vaults
Sump pumps shall be submersible type with a capacity for not less than [_____] L/min gal/min at a total dynamic
head of [3.1 m] [_____] m [10] [_____] feet. The motor shall include automatic thermal overload protection.
Each pump shall have an internal magnetic float switch, stainless steel shaft, bronze impeller, and cast iron
motor housing and volute. The cable shall be continuous and of a waterproof type with watertight plug of sufficient
length to include slack and allow connection to receptacle as shown.
2.2.14 Circuit Breakers and High-Voltage Switches
NOTE: Circuit breakers and high-voltage switches should normally be rated at
150 percent of the full load current rating of the transformer or the device
protected. Do not use manually operated fuse cutouts.
Circuit breakers and high-voltage switches shall be NEMA AB 1 type or approved by UL 489. Switchgear for use
in manholes and underground vaults shall be subway type. Cutouts shall be vaulted for [_____] volts, [_____]
amperes, [_____] kV BIL. Hermetically sealed cutouts shall be provided with expansion chambers for full rating.
Cutout shall be mounted on galvanized steel junction boxes with bolted-on covers, unless indicated otherwise.
2.2.15 Transformer, Substations and Switchgear
The transformer substations and switchgear shall be as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM.
2.2.16 Emergency Generator and Automatic Transfer Switch System
NOTE: Sections 26 36 00.00 41 AUTOMATIC TRANSFER [AND BY-PASS/ISOLATION] SWITCHES,
26 32 15.00 10 DIESEL-GENERATOR SET STATIONARY 100-2500 KW, WITH AUXILIARIES,
and 26 32 14.00 10 DIESEL-GENERATOR SET, STATIONARY 15-300 KW, STANDBY APPLICATIONS
shall be edited and modified as necessary to suit the specific helipad installation.
Helipad requirements include the following. Emergency generator sets shall
be rated 0.8 power factor lagging, either 4160/2400 or 480/277 volts, 3-phase,
4-wire, grounded wye, 60 Hz. Installations for OCONUS usually require 50 Hz.
Governor shall provide speed regulation of 5 percent from no load to full load.
Provide manual voltage control, electromagnetic interference suppression, batteries,
battery charger, and repair parts. Parallel operation and remote control speed
adjustments are not required. Automatic transfer switch shall be specified
for ratings needed for the helipad lighting installation. The generator and
automatic transfer switch system shall accomplish a complete transfer to the
emergency power supply within 15 seconds of interruption of the normal power
supply for Category I helipads. Time delay to override momentary normal source
outages to delay all transfer switch and engine starting signals shall be set
at three seconds. Where climatic conditions warrant, cold starting capability
suitable to the minimum temperature to be encountered shall be provided.
The automatic transfer switch shall be in accordance with Section [26 36 00.00 10 AUTOMATIC TRANSFER [AND BY-PASS/ISOLATION]
SWITCHES] [_____] and as required by the contract drawings or contracting documents. The emergency generator
shall be in accordance with [26 32 15.00 10, DIESEL-GENERATOR SET STATIONARY 100-2500 kW, WITH AUXILIARIES] [
26 32 14.00 10, DIESEL-GENERATOR SET, STATIONARY 15-300 kW, STANDBY APPLICATIONS] [_____] and as required by
the contract drawings or contracting documents.
2.2.17 Circuit Selector Cabinet
NOTE: Circuit selector cabinets were previously referred to as distribution
boxes and may be provided to select one or a second circuit or to select any
combination of up to four circuits.
The circuit selector cabinet shall be [FAA AC 150/5345-5, Type L-847, for [one] [two] [three] [four] circuit
control] [as indicated], Class [A, indoor] [B, outdoor], Rating [1, for 6.6 amperes] [2, for 20 amperes].
2.2.18 Pilot Relay Panel
NOTE: Type I pilot relay panel has 24 double-pole, single-throw relays and
is used for systems including approach lighting systems. Specify a Type II
relay panel if 16 double-pole, single-throw relay sand 8 double-pole, double-throw
relays are required for a system. Specify L-841 panel only if 48 V dc control
is required.
The pilot relay panel shall be NEMA 250, NEMA ICS 2, NEMA ICS 6, NEMA PB 1 and FAA AC 150/5345-13, Type L-841,
for 48 V dc control systems.
2.2.19 Control Panel
NOTE: Refer to FAA AC 150/5354-3 for type, class, and style.
The control panel for helipad lighting shall be FAA AC 150/5345-3, Type L-821 Type [_____], Class [_____], Style
[_____]. Quantity and color of lenses shall conform to FAA AC 150/5345-3 and shall correspond to the actual
circuits indicated.
2.2.20 Lighting Fixtures
NOTE: See Army Standard Detail No. 40-06-05 for the lighting fixtures for the
specific helipad lighting application. Select fixtures and equipment for operation
of visual aids and delete the unused items.
The lighting fixtures for the helipad lighting shall be as required in contract drawings or other contract documents.
2.2.21 Painting
As specified in Section [09 90 00, PAINTS AND COATINGS] [32 17 24.00 10, PAVEMENT MARKINGS].
2.3 HELIPAD MARKINGS
The helipad markings shall be [a large white "letter-H" at the center of the helipad with broken white edge markings]
[a red "letter-H" centered on a white cross and the broken white edge markings]. The markings shall be [retroreflective]
[non-retroreflective] with dimensions as shown on the contract drawings.
2.4 HELIPAD BEACON
The helipad rotating beacon, shall be FAA AC 150/5345-12, Type L-801H, Class 2, except for military facilities
the white beam shall be a double-peaked white flash. The beacon shall flash the colors [white, aviation green,
and aviation yellow for a non-medical facility helipad] [white, aviation green, and aviation red for a medical
facility helipad.] The beacon flashes shall be visible throughout 360 degrees horizontally, and the effective
intensity of the flashes shall be not less than 25,000 candelas for vertical angles between 2 and 8 degrees and
not less than 12,500 candelas for vertical angles between 0 and 10 degrees. The flashes shall be uniformly spaced
with the three-color sequence flashing 10 to 15 times per minute.
2.5 WIND DIRECTION INDICATOR
The wind direction indicator shall be an FAA AC 150/5345-27, Type [L-806, low mass supporting structure] [L-807,
rigid supporting structure], Style [I-lighted] [II-unlighted], Size [304.8 - 2438 mm] [1 - 8 feet] [609.6 - 3658
mm] [2 - 12 feet] with the fabric cone color as required on the contract drawings.
2.6 OBSTRUCTION LIGHTING AND MARKING
Obstructions on or near the helipad shall be marked and/or lighted as shown on the contract drawings. Obstruction
marker lights shall emit aviation red [flashing] [steady burning] [flashing and/or steady burning] light as required.
The light fixtures shall be , [multiple-socket assembly] [series socket assembly] [FAA AC 150/5345-43, [Type
L-810] [Type L-864]] as indicated. For multiple flashing lights on a circuit, the lights shall flash in unison.
Obstruction marker lights shall be [single-unit type] [double-unit type] [single-or double-unit type] as shown
on the contract drawings or other contract documents.
2.7 HELIPAD GLIDE SLOPE INDICATOR
The glide slope indicator for helipads shall be Chase Helicopter Approach Path Indicator (CHAPI) two-unit system.
The CHAPI shall meet the requirements of FAA AC 150/5345-28, Type L-881, with the addition of a filter that will
provide a two-degree wide green sector in the center of the white over red beam.
2.8 HOVERLANE LIGHTS
The hoverlane lights shall be alternating green and yellow steady burning lights along the hoverlane centerline.
The fixtures shall be [FAA AC 150/5345-46, Type L-861 for elevated lights with aviation yellow or aviation green
globes] [as shown on the contract drawings]. The elevated lights shall be frangibly mounted on [steel stakes]
[bases]. For hoverlane lights located in paved areas subjected to aircraft or vehicle traffic, the fixtures
shall be [FAA AC 150/5345-46, Type L-852E with aviation yellow or aviation green filters mounted on FAA AC 150/5345-42
, Type L-868 bases] [as required]. The hoverlane lights shall be energized from a [6.6 ampere series circuit
through isolation transformers] [120-240 volt multiple circuit] power source as required by the contract drawings.
The isolation transformers for series circuits shall be FAA AC 150/5345-47, Type L-830-1, 6.6/6.6 amperes, 30/45
watts 60 hertz.
2.9 EXPLOSION-PROOF AVIATION LIGHT FIXTURE
NOTE: Only fixtures that are listed by U.L. or an equivalent lab shall be used
in a hazardous location. Listing must reflect the installed configuration.
A listing for the fixtures shown in Standard Detail No. 40-06-05, sheet 12 has
not been obtained.
For lights located in explosion hazardous areas, the fixtures shall be approved and listed to meet the requirements
of UL Electrical Constructn or FM P7825a as defined in NFPA 70 for the hazard and application. The explosion-proof
fixtures are located as shown on the contract drawings or otherwise specified herein.
2.10 HELIPAD LIGHTING, VISUAL METEOROLOGICAL CONDITIONS (VMC)
The VMC helipad lighting basically consists of the perimeter lights; but landing direction lights, approach direction
lights, helipad floodlights, and helipad inset lights shall be provided as specified.
2.10.1 Perimeter Lights
The perimeter lights are used to mark the edges of helipads intended for operations at night. The fixtures shall
be FAA AC 150/5345-46, Type L-861 with aviation yellow globes. These elevated lights shall be frangibly mounted
on [steel stakes] [FAA AC 150/5345-42, Type L-867 bases]. For perimeter lights located in paved areas subject
to aircraft or vehicular surface traffic, the fixtures shall be FAA AC 150/5345-46, Type L-852E with aviation
yellow filters. These fixtures shall be mounted on FAA Type L-868 bases. These lights shall be energized from
a [6.6 ampere circuit through isolation transformers] [120/240 volt multiple circuit] as required by the contract
drawings. The isolation transformers for series circuits shall be FAA AC 150/5345-47, Type L-830-1, 6.6/6.6
amperes, 30/45 watts, 60 hertz.
2.10.2 Landing Direction Lights
The landing direction lights mark the preferred direction for the approach to landing on the helipad. The light
fixtures shall be FAA AC 150/5345-46, Type L-861 with aviation yellow globes. These elevated lights shall be
frangibly mounted on [steel stakes] [FAA AC 150/5345-42, Type L-867 bases]. For landing direction lights located
in paved areas subject to aircraft or vehicular surface traffic, the fixtures shall be FAA AC 150/5345-46, Type
L-852E with aviation yellow filters. These fixtures shall be mounted FAA Type L-868 bases. These lights shall
be energized from [6.6 ampere series circuit through isolating transformers] [120/240 volt multiple circuit]
power source as required by the contract drawings. The isolation transformers for series circuits shall be
FAA AC 150/5345-47, Type 1-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.10.3 Approach Direction Lights
The approach direction lights emit white light to indicate the direction for approach to the helipad. The fixtures
shall be FAA AC 150/5345-46, Type L-861 with aviation white globes. These elevated lights shall be frangibly
mounted on [steel stakes] [FAA AC 150/5345-42, Type L-867 bases]. For approach direction lights located in paved
areas subject to aircraft or vehicular surface traffic, the fixtures shall be FAA AC 150/5345-46, Type L-852E
without filters. These lights shall be mounted on FAA Type L-868 bases. These lights shall be energized from
a [6.6 ampere series circuit through isolation transformers] [120/240 volt multiple circuit] power source as
required by the contract drawings. The isolation transformers for series circuits shall be FAA AC 150/5345-47
, Type L-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.10.4 Helipad Floodlights
Helipad floodlights provide texture on the helipad surface at night. The floodlight fixtures are as required
in the contract drawings. These lights shall be [mounted on FAA AC 150/5345-42, [Type L-867] [Type L-858] bases]
[[or] [as approved].] The lights shall be energized from 120/240 volt multiple circuits.
2.10.5 Helipad Inset Lights
Helipad inset shall be FAA AC 150/5345-46, Type L-852E [with aviation blue filters] [without filters]. These
lights shall be mounted on FAA AC 150/5345-42, Type L-868 light bases. These lights shall be energized from
a [6.6 ampere series circuit through isolation transformers] [120/240 volt multiple circuit] power source as
shown on the contract drawings. The isolation transformers for series circuits shall be FAA AC 150/5345-47,
Type L-830-1, 6.6/6.6 amperes, 30/45 watts, 60 hertz.
2.11 HELIPAD LIGHTING, INSTRUMENT METEOROLOGIC CONDITIONS (IMC)
The IMC helipad lighting consists of perimeter lights, approach lights, and landing direction lights.
2.11.1 Helipad IMC Perimeter lights
For IMC perimeter lights, shall be FAA AC 150/5345-46, Type L-861SE elevated, medium-intensity, bidirectional
fixtures with aviation yellow filters. These lights shall be frangibly mounted on FAA AC 150/5345-42, Type L-867
bases. These lights shall be energized from a [6.6 ampere series circuit through isolation transformers] [120/240
volt multiple circuit] power source as required by the contract drawings. [The isolation transformers for series
circuits shall be FAA AC 150/5345-47, Type L-830-4 6.6/6.6 amperes, 100 watts, 60 hertz.]
2.11.2 Helipad IMC Approach Lights
The IMC helipad approach lights fixtures shall be [FAA specification FAA E-982 lampholder for Type PAR-56 lamps
without filters]. The fixtures shall be frangibly mounted on [steel stakes] [FAA AC 150/5345-42, Type L-867
bases]. The lamps shall be as required by the contract drawings. The lights shall be energized by a [6.6 ampere]
[20 ampere] series circuit through isolation transformers. The isolation transformers shall be FAA AC 150/5345-47
, Type L-830-6, 6.6/6.6 ampere, 200 watt, 60 hertz transformers.
2.11.3 Helipad IMC Landing Direction Lights
The helipad IMC landing direction lights fixtures shall be FAA AC 150/5345-46, Type L-862 elevated, high-intensity,
bidirectional, fixtures with aviation yellow filters. The lights shall be frangibly mounted on [FAA AC 150/5345-42
, Type [L-868] [L-867]] bases. These lights shall be energized from a [6.6 ampere series circuit through isolation
transformers] [120/240 volt multiple circuit] power source as required by the contract drawings. The isolation
transformers for series circuits shall be FAA AC 150/5345-47, Type L-830-6, 6.6/6.6 ampere, 200 watt, 60 hertz
transformers.
2.12 AIRFIELD AND HELIPORT LIGHTING SYSTEMS
Lighting at airfield or heliport interfaces shall be as specified in [Section 26 56 20.00 10, AIRFIELD AND HELIPORT
LIGHTING AND VISUAL NAVIGATION AIDS.]
2.13 FACTORY COATING
NOTE: A 200-hour test will be specified in a noncorrosive environment and a
500-hour test will be specified in a corrosive environment.
Equipment and component items, including but not limited to transformer stations and ferrous metal luminaries
not hot-dip galvanized or porcelain enamel finished, shall be provided with corrosion-resistant finishes which
shall withstand [200] [500] 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. The scribed test mark and test evaluation shall be in accordance with ASTM D 1654 with a rating
of not less than 7 in accordance with TABLE 1, (Procedure A). Cut edges or otherwise damaged surfaces of hot-dip
galvanized sheet steel or mill galvanized sheet steel shall be coated with a zinc rich paint conforming to SSPC Paint 20
in accordance with ASTM A 780.
PART 3 EXECUTION
3.1 Verification of Dimensions
After becoming familiar with details of the work, verify dimensions in the field, and advise the Contracting
Officer of any discrepancy before performing any work.
3.2 GENERAL INSTALLATION REQUIREMENTS
Circuits installed underground shall conform to the requirements of Section 33 70 02.00 10 ELECTRICAL DISTRIBUTION
SYSTEM, UNDERGROUND, except as covered herein. Steel conduits installed underground shall be installed and protected
from corrosion in conformance with the requirements of Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. Except
as covered herein, excavation, trenching, and backfilling shall conform to the requirements of Section
31 00 00 EARTHWORK. Concrete work shall conform to the requirements of Section 03 31 00.00 10 CAST-IN-PLACE STRUCTURAL
CONCRETE.
3.3 CABLES, GENERAL REQUIREMENTS
The type of installation, size and number of cables shall be as indicated. Conductors larger than No. 8 AWG
shall be stranded. Loads shall be divided as evenly as practicable on the various phases of the system. Manufacturer's
written recommendations shall be furnished for each type of splice and medium-voltage cable joint and termination,
and for fireproofing application methods, and shall be approved before any work is done. Medium-voltage cable
joints and terminations shall be the standard product of a manufacturer and shall be either of the factory preformed
type or of the kit type containing tapes and other required parts. Medium-voltage cable joints shall be made
by qualified cable splicers. Compounds and tapes shall be electrical grade suitable for the cable insulation
provided and shall use design materials and techniques recommended by the manufacturer. Maximum length of cable
pull and cable pulling tensions shall not exceed the cable manufacturer's recommendations.
3.3.1 Duct Line Installation
[Medium-voltage cables] [Low-voltage cables] [Cables] shall be installed in duct lines [where indicated]. [Cable
splices in low-voltage cables shall be made in manholes and handholes only, except as otherwise noted.] [Cable
joints in medium-voltage cables shall be made in manholes only.] Neutral [and ground] conductors shall be installed
in the same duct with their associated phase conductors. Counterpoise cable shall be installed in a separate
duct or direct-burial not less than [150 mm] [_____] mm [6] [_____] inches above the uppermost duct containing
electrical cable. Electrical metallic tubing shall not be installed underground or enclosed in concrete.
3.3.2 Direct-Burial Installation
NOTE: Use 750 mm (30 inch) back-fill cover for cable ratings up to 15 kV and
900 mm (36 inch) cover for cable ratings above 15 kV and up to 35 kV.
[Medium-voltage cables] [Low-voltage cables] [Cables] shall be buried directly in the earth as indicated. Minimum
cover from the top of a cable to finished grade shall be [600 mm 24 inches for low-voltage cables] [[750] [900]
mm [30] [36] inches from medium-voltage cables,] but not less than the depth of the frost line. Counterpoise
cable shall be not less than [150] [_____] mm [6] [_____] inches above the uppermost electrical cable or duct
containing cable but not less than the depth of the frost line.
3.3.2.1 Trenching
Trenches for direct-burial cables shall be excavated to depths required to provide the minimum necessary cable
cover. Bottoms of trenches shall be smooth and free of stones and sharp objects. Where bottoms of trenches
comprise materials other than sand or stone-free earth, 75 mm 3 inch layers of sand or stone-free earth shall
be laid first and compacted to approximate densities of surrounding firm soil.
3.3.2.2 Cable Installation
NOTE: Where a buried cable warning is necessary, the requirement for a tape
or approved warning indication will be provided. Where soil is known to be
rocky, provide selected backfill for cable protection.
Cables shall be unreeled along the sides of or in trenches and carefully placed on sand or earth bottoms. Pulling
cables into direct-burial trenches from a fixed reel position will not be permitted, except as required to pull
cables through conduits under paving or railroad tracks. Where cables cross or are installed in layers at different
depths, a separation of at least 75 mm 3 inches vertically and 50 mm 2 inches horizontally shall be provided,
unless each cable circuit is protected by a nonmetallic conduit sleeve at the crossing. Where single-conductor
cable is installed for three-phase circuits, all three phases and the neutral shall be installed in the same
sleeve. Bend radius of any cable shall be not less than 10 times the diameter of the cable. In no case shall
cables be left under longitudinal tension. The first 100 mm 4 inch layer of backfill shall be of sand or stone-free
earth. [A 0.127 mm 5 mil, brightly colored plastic tape not less than 75 mm 3 inches in width and suitably inscribed
at not more than 3 m 10 feet on centers, or other approved dig-in warning indication, shall be placed approximately
300 mm 12 inches below finished grade levels of trenches.] [Selected backfill of sand or stone-free earth shall
be provided to a minimum depth of 75 mm 3 inches above cables.]
3.3.2.3 Other Requirements
Where direct-burial cables cross under roads or other paving exceeding 1.5 m 5 feet in width, such cables shall
be installed in concrete-encased ducts. Where direct-burial cables cross under railroad tracks, such cables
shall be installed in reinforced concrete-encased ducts. Ducts shall extend at least 300 mm 1 foot beyond each
edge of any paving and at least 1.5 m 5 feet beyond each side of any railroad tracks. Cables may be pulled into
conduit from a fixed reel where suitable rollers are provided in the trench. Direct-burial cables shall be centered
in duct entrances. A suitable waterproof nonhardening mastic compound shall be used to facilitate such centering.
If paving or railroad tracks are in place where cables are to be installed, coated rigid steel conduits driven
under the paving or railroad tracks may be used in lieu of concrete-encased ducts. Damage to conduit coatings
shall be prevented by providing ferrous pipe jackets or by suitable predrilling. Where cuts are made in any
paving, the paving and sub-base shall be restored to their original condition.
3.3.2.4 Medium-Voltage Cable Joints or Low-Voltage Cable Splices
Cable joints or splices in direct-burial cables are not permitted in runs of 300 m 1000 feet or less, nor at
intervals of less than 300 m 1000 feet in longer runs, except as required for taps. Locations of cable joints
or splices in shorter intervals, where required to avoid obstructions or damage to cables, shall be approved.
Cable joints or splices shall be installed in cable boxes, except that medium-voltage separable connectors or
low-voltage sealed insulated connectors do not require cable boxes.
3.3.2.5 Surface Markers
Markers shall be located near the ends of cable runs, at each cable joint or splice, at approximately every 150
m 500 feet along cable runs, and at changes in direction of cable runs. Markers shall be constructed as indicated.
3.3.3 Connection to Buildings
Cables shall be extended into the various buildings as indicated, and shall be properly connected to the first
applicable termination point in each building. Interfacing with building interior conduit systems shall be at
conduit stubouts terminating 1.5 m 5 feet outside of a building and 600 mm 2 feet below finished grade as specified
and provided under Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM. After installation of cables, conduits shall
be sealed with caulking compound to prevent entrance of moisture or gases into buildings.
3.4 MEDIUM-VOLTAGE CABLES
Medium-voltage cables shall be suitable for a rated circuit voltage of [5 kV] [15 kV] [25 kV] [28 kV] [35 kV].
Other parts of the cable system such as joints and terminations shall have ratings not less than the rating of
the cables on which they are installed. Separate insulated connectors shall have nominal voltage ratings coordinated
to associated apparatus ratings rather than cable ratings when used to connect cable to apparatus. Cables shall
be provided with [100] [133] percent insulation level [and 28 kV and 35 kV insulation thicknesses shall be in
accordance with either AEIC CS8 or AEIC CS8 as applicable]. Neutral conductors of grounded neutral systems shall
be of the same insulation material as phase conductors, except that a 600-volt insulation rating is acceptable.
3.4.1 Cable Joints
Shields shall be applied as required to continue the shielding system through each entire cable joint. Shields
may be integrally molded parts of preformed joints. Shields shall be grounded at each joint.
3.4.1.1 Types
Separable insulated connectors of suitable construction or standard splice kits shall be used for single-conductor
and two-conductor cables. The connectors shall be of FAA AC 150/5345-26 [factory preformed] [resin pressure-filled]
[_____] type. Cables joints for which acceptable separable connector kits are not available may use [factory
preformed] [vulcanized] [taped joint] [resin pressure-filled overcast taped] [_____] splices if approved.
3.4.1.2 Requirements
Cable joints shall provide insulation and jacket equivalent to that of the associated cable. Lead sleeves shall
be provided for lead-covered cables. Armored cable joints shall be enclosed in compound-filled, cast-iron or
alloy, splice boxes equipped with stuffing boxes and armor clamps of a suitable type and size for the cable being
installed.
3.4.2 Terminations
Terminations shall be IEEE Std 48, Class 1 or Class 2; of the molded elastomer, wet-process porcelain, pre-stretched
elastomer, heat-shrinkable elastomer, or taped type. Acceptable elastomers are track-resistant silicone rubber
or track-resistant ethylene propylene compounds, such as ethylene propylene rubber or ethylene propylene diene
monomer. Separable insulated connectors may be used for apparatus terminations, when such apparatus is provided
with suitable bushings. Terminations shall be of the outdoor type, except that where installed inside outdoor
equipment housings which are sealed against normal infiltration of moisture and outside air, indoor, Class 2
terminations are acceptable. Class 3 terminations are not acceptable. Terminations, where required, shall be
provided with mounting brackets suitable for the intended installation and with grounding provisions for the
cable shielding, metallic sheath, and armor.
3.4.2.1 Factory Preformed Type
NOTE: In areas where heavy fog, salt air or medium to heavy industrial contamination
occur, require that terminations pass the next higher wet withstand test for
factory preformed terminations. For taped termination, use 318 mm (12-1/2 inches)
for cable rated 5 kV, 508 mm (20 inches) for cable rated 15 kV, 635 mm (25 inches)
for cable rated 25 kV, and 889 mm (35 inches) for cable rated 28 kV or 35 kV
in normal atmospheres. Use next higher voltage level lengths in contaminated
atmospheres which will require 1.2 m (46 inches) for 28 kV or 35 kV cables.
Molded elastomer, wet-process porcelain, pre-stretched, and heat-shrinkable terminations shall utilize factory
preformed components to the maximum extent practicable rather than tape build-up. Terminations shall have basic
impulse levels as required for the system voltage level. Leakage distances shall pass the wet withstand voltage
test required by IEEE Std 48 for the next higher BIL level.
3.4.2.2 Taped Terminations
Taped terminations shall use standard termination kits providing suitable terminal connectors, [field-fabricated
stress cones], [and rain hoods]. Terminations shall be at least [318] [508] [635] [889] [1200] mm[12 1/2] [20]
[25] [35] [46] inches long from the end of the tapered cable jacket to the start of the terminal connector, or
not less than the kit manufacturer's recommendations, whichever is greater.
3.5 LOW-VOLTAGE CABLES
Cable shall be rated 600 volts, except that secondaries of isolation transformer to in-pavement lights installed
in pavement and 48 volt DC control cables may be 300 volts. Other parts of cable systems such as splices and
terminations shall be rated at not less than 600 volts. Splices in wires No. 10 AWG and smaller shall be made
with an insulated, solderless, pressure type connector, conforming to the applicable requirements of UL 486A-486B
. Splices in wires No. 8 AWG single conductor cable shall be made with [FAA AC 150/5345-26 Type L-823 connectors]
[non-insulated, solderless, pressure type connector, conforming to the applicable requirements of UL 486A-486B
]. They shall be covered with an insulation and jacket material equivalent to the conductor insulation and jacket.
All splices below grade or in wet locations shall be sealed type conforming to NEMA C119.1 or shall be waterproofed
by a sealant-filled, thick wall, heat shrinkable, thermosetting tubing or by pouring a thermosetting resin into
a mold that surrounds the joined conductors.
3.6 DUCT LINES
NOTE: Communication lines run elsewhere will be provided with the type of wall
thickness that is in accordance with the appropriate communication agency's
policy. Electrical metallic tubing will not be installed underground or encased
in concrete.
[Duct lines shall be concrete-encased, thin-wall type.] [Duct lines shall be non-encased direct-burial, thick-wall
type.] [Duct lines shall be concrete-encased, thin-wall type for duct lines between manholes and for other medium-voltage
lines]. [Low-voltage lines run elsewhere may be non-encased direct-burial, thick-wall type.] [Communication
lines run elsewhere may be direct-burial, thick-wall type.]
3.6.1 Requirements
Numbers and sizes of ducts shall be as indicated. Duct lines shall be laid with a minimum slope of 100 mm/30
m 4 inches/100 feet. Depending on the contour of the finished grade, the high-point may be at a terminal, a
manhole, a handhole, or between manholes or handholes. Manufactured 90-degree duct bends may be used only for
pole or equipment risers, unless specifically indicated as acceptable. The minimum manufactured bend radius
shall be 450 mm 18 inches for ducts of less than 78 mm 3 inches diameter, and 900 mm 36 inches for ducts 78 mm
3 inches or greater in diameter. Otherwise, long sweep bends having a minimum radius of 7.6 m25 feet shall
be used for a change of direction of more than 5 degrees, either horizontally or vertically. Both curved and
straight sections may be used to form long sweep bends as required, but the maximum curve used shall be 30 degrees
and manufactured bends shall be used. Ducts shall be provided with end bells whenever duct lines terminate in
manholes or handholes. Duct line markers shall be provided as indicated at the ends of long duct line stubouts
or for other ducts whose locations are indeterminate because of duct curvature or terminations at completely
below-grade structures. In lieu of markers, a 0.127 mm 5 mil brightly colored plastic tape not less than 76.2
mm 3 inches in width and suitably inscribed at not more than 3.0 m 10 feet on centers with a continuous metallic
backing and a corrosion-resistant 0.025 mm 1 mil metallic foil core to permit easy location of the duct line,
shall be placed approximately 300 mm 12 inches below finished grade levels of such lines.
3.6.2 Treatment
Ducts shall be kept clean of concrete, dirt, or foreign substances during construction. Field cuts requiring
tapers shall be made with proper tools and match factory tapers. After a duct line is completed, a standard
flexible mandrel shall be used for cleaning followed by a brush with stiff bristles. Mandrels shall be at least
300 mm 12 inches long and have diameters 6.4 mm 1/4 inch less than the inside diameter of the duct being cleaned.
Pneumatic rodding may be used for draw-in lead wires. A coupling recommended by the duct manufacturer shall
be used whenever an existing duct is connected to a duct of different material or shape. Ducts shall be stored
to avoid warping and deterioration with ends sufficiently plugged to prevent entry of any water or solid substances.
Ducts shall be thoroughly cleaned before being laid. Plastic ducts shall be stored on a flat surface and protected
from the direct rays of the sun.
3.6.3 Concrete Encasement
Each single duct shall be completely encased in concrete with a minimum of 75 mm 3 inches of concrete around
each duct, except that only 50 mm 2 inches of concrete are required between adjacent electric power or adjacent
communication ducts, and 100 mm 4 inches of concrete shall be provided between adjacent electric power and communication
ducts. Duct line encasements shall be monolithic construction. Where a connection is made to a previously poured
encasement, the new encasement shall be well bonded or doweled to the existing encasement. At any point, except
railroad crossings, tops of concrete encasements shall be not less than 450 mm 18 inches below finished grade
or paving. At railroad crossings, duct lines shall be encased with concrete, reinforced as indicated. Tops
of concrete encasements shall be not less than 1.5 m 5 feet below tops of rails, unless otherwise indicated.
Separators or spacing blocks shall be made of steel, concrete, plastic, or a combination of these materials placed
not further apart than 1.2 m 4 feet on centers. Ducts shall be securely anchored to prevent movement during
the placement of concrete and joints shall be staggered at least 150 mm 6 inches vertically.
3.6.4 Non-encased Direct-Burial
Top of duct lines shall be below frost line but not less than 600 mm 24 inches below finished grade. Ducts shall
be buried below frost line in the earth and shall be installed with a minimum of 75 mm 3 inches of earth around
each duct, except that between adjacent electric power and communication ducts, 300 mm 12 inches of earth is
required. Bottoms of trenches shall be graded toward manholes or handholes and shall be smooth and free of stones,
soft spots, and sharp objects. Where bottoms of trenches comprise materials other than sand or stone-free earth,
75 mm 3 inch layers of sand or stone-free earth shall be laid first and compacted to approximate densities of
surrounding firm soil before installing ducts in direct-contact tiered fashion. Joints in adjacent tiers of
duct shall be vertically staggered at least 150 mm 6 inches. The first 100 mm 4 inch layer of backfill cover
shall be sand or stone-free earth compacted as previously specified. Duct banks may be held in alignment with
earth. However, high-tiered banks shall use a wooden frame or equivalent form to hold ducts in alignment prior
to backfilling. Selected earth at duct banks shall be thoroughly tamped in 100 to 150 mm 4 to 6 inch layers.
3.6.5 Installation of Couplings
Joints in each type of duct shall be made up in accordance with the manufacturer's recommendations for the particular
type of duct and coupling selected and as approved. In the absence of specific recommendations, various types
of duct joint couplings shall be made watertight as specified.
3.6.5.1 Asbestos-Cement and Bituminized-Fiber Ducts
To ensure a watertight joint, tapered ends or joints of the same material as the ducts shall be swabbed with
bituminous or joint-sealing compound before couplings are applied. Plastic or nonmetallic couplings shall be
tightly driven onto unswabbed ducts. Due to the brittleness of plastic couplings at low temperatures, such couplings
shall not be installed when temperatures are below minus 18 degrees C 0 degrees F. Couplings shall be warmed
in hot water or by another approved method when installed at temperatures below 0 degrees C 32 degrees F.
3.6.5.2 Plastic Duct
Duct joints shall be made by brushing a plastic solvent cement on insides of plastic coupling fittings and on
outsides of duct ends. Each duct and fitting shall then be slipped together with a quick one-quarter-turn twist
to set the joint tightly.
3.7 MANHOLES AND HANDHOLES
NOTE: When preparing Section 33 70 02.00 10 ELECTRICAL DISTRIBUTION SYSTEM,
UNDERGROUND for a project specification, the designer will edit the guide specification
as necessary to suit the specific helipad installation. Note that for helipads
standard type manholes, vaults, manholes, vaults, handholes, and their associated
frames and covers may be used. If one of these will be located on the helipad
or surface subject to aircraft traffic loads, these features may require a design
for a maximum single wheel load of 22,680 kg (50,000 pounds) or dual wheel load
of 40,820 kg (90,000 pounds). Use steel conforming to ASTM A 36, "Structural
Steel", for covers at helipad manholes, vaults, and handholes. Use ductile
iron for frames conforming to ASTM A 536, grade 65-45-12.
Manholes and handholes shall be as specified in Section 33 70 02.00 10 ELECTRICAL DISTRIBUTION SYSTEM, UNDERGROUND.
3.8 WELDING
The welding supports and metallic ducts and welding or brazing of electrical connections shall be by qualified
welders.
3.9 CABLE MARKERS
Cable markers or tags shall be provided for each cable at duct entrances entering or leaving manholes or handholes
and at each termination within the lighting vault. Tag cables in each manhole or handhole with not less than
two tags per cable, one near each duct entrance hole. Immediately after cable installation, tags shall be attached
to cables and wires so that they cannot be accidentally detached.
3.10 FRANGIBLE REQUIREMENTS
Frangible supports, couplings, and adapters shall be installed as indicated or as specified.
3.11 ELEVATED HELIPAD LIGHTS
Elevated helipad lights shall be frangibly mounted, normally not exceeding 350 mm 14 inches in height, unless
higher mounting is permitted in snow accumulation areas as indicated.
3.12 SEMIFLUSH HELIPAD LIGHTS
Water, debris, and other foreign substances shall be removed prior to installing semiflush light base and light.
Positioning jigs shall be used to hold the light bases and/or lights to ensure correct orientation and leveling
until concrete, adhesive, or sealant can provide permanent support.
3.13 WIRES, FIXTURES, AND ENCLOSURES IN SAW KERFS AND DRILLED HOLES
Sealant is specified in paragraph Sealing Fixtures and Wires in Drilled Holes or Saw Kerfs.
3.13.1 Holes for Light Fixtures
Holes shall be bored in existing pavement to the dimensions indicated using a diamond-edged bit to provide a
smooth, straight cut. Bottom of hole shall be flat or slightly concave, except that an area at least 25 mm one
inch wide around the perimeter shall be flat. Surfaces deeper than the prescribed depth shall be filled with
sealant to the level of the flat area and allowed to cure before further placement.
3.13.2 Holes for Transformer Enclosures
Holes shall be drilled or excavated through concrete pavement and loose material removed. Hole shall be filled
with concrete to depth indicated. A minimum of 75 mm 3 inches of concrete shall be provided at bottom of hole.
3.13.3 Saw Kerfs and Splice Chambers
Kerfs and splice chambers shall be saw cut in pavements where indicated. Saw cuts shall be in straight lines
with vertical sides. Width and depth of saw cuts shall be adequate for the required number of wires. Saw kerfs
shall have the vertical edges chamfered at intersections. Where a saw kerf crosses a construction joint, the
depth shall be increased sufficiently to allow for slack wire in flexible tubing under the joint.
3.13.4 Sandblasting
Saw kerfs, grooves, and holes shall be sandblasted to remove foreign or loose material using approved equipment
maintained in good working order at all times. Sand for blasting shall be proper size and quality as necessary
to perform the work. Nozzles used for sandblasting shall be of the proper size in relation to the groove or
holes to be cleaned. Nozzles enlarged by wear shall be replaced as necessary. Sandblast air pressure shall
be not less than 621 kPa 90 psi.
3.13.5 Cleaning
Immediately prior to installation of wire or light fixtures, saw kerfs and holes shall be flushed with a high
velocity water jet or steam, and cleaned and dried with a high velocity air jet.
3.13.6 Lighting Fixture Installation
NOTE: The designer shall provide details on the project drawings showing the
installed light fixture with reference to the pavement.
Sides and bottom of each light base shall be sandblasted immediately prior to installation. Inside faces of
bored hole and bottom and sides of light base shall be covered with a coating of sealant. Sealant shall completely
fill the void between concrete and base. A jig or holding device shall be used for installing each light fixture
to ensure positioning to the proper elevation, alignment, level control, and azimuth control. Light fixture
shall be oriented with light beams parallel to the preferred direction of approach to the helipad. Level outermost
edge of fixture with the surrounding pavement. Surplus sealant or flexible embedding material shall be removed.
The holding device shall be left in place until sealant has reached its initial set. Fixture lead wires shall
be properly arranged with respect to their connecting position. The wire way entrance into the light recess
shall be blocked to retain the sealant material during curing.
3.13.7 Installation of Circuit Wires in Pavement
Wires shall be placed in saw kerfs and anchored at bottom by means of rubber or plastic wedges or noncorrosive
metal clips placed every 600 or 900 mm 2 or 3 feet or as often as necessary to hold the wire down. Wires crossing
existing joints shall be encased in a 300 mm 12 inch length of flexible tubing of polyethylene material conforming
to ASTM D 1248, Type II or Type III, to break the bond between the wires and the sealing material. Flexible
tubing shall be centered on the joint and of sufficient size to accommodate the wires to allow for movement of
the wires as the joint opens and closes. Ends of tubing shall be wrapped with tape to prevent entrance of sealing
materials. The adjacent joint area shall be packed temporarily with roving material, such as hemp, jute, cotton,
or flax, to prevent sealing material from flowing into the open joint. Sealing materials shall be mixed and
applied in accordance with the manufacturer's instructions and at the recommended temperature. Surplus or spilled
material shall be removed.
3.14 SPLICES FOR HELIPAD LIGHTING CABLE
3.14.1 Connectors
Kit type connectors shall be used to splice 5 kV single-conductor series lighting cables. During installation
and prior to covering with earth, mating surfaces of connectors shall be covered until connected and cleaned
when plugged together. At joint where connectors come together, install heat shrinkable tubing with waterproof
sealant. Alternately, the Contractor may provide two half lapped layers of tape over the entire joint. Joint
shall prevent entrapment of air which might subsequently loosen the joint.
3.14.2 Splicing Fixtures to the Wires in Pavement Saw Kerfs
Splices shall be made with pre-insulated watertight connector sleeves crimped with a tool that requires a complete
crimp before tool can be removed.
3.15 GROUNDING SYSTEMS
NOTE: The preferred method of grounding is to have grounding circuit separate
and not connected to the counterpoise. The light fixtures, equipment, and buildings
are connected to the grounding circuit. If necessary, grounding to the counterpoise
may be permitted.
3.15.1 Counterpoise Installation
Counterpoise wire shall be placed for entire length of circuits supplying helipad lighting. Wire shall be provided
in one piece, except where distance exceeds the length usually supplied. Counterpoise shall be installed on
top of the envelope of concrete-encased duct and approximately 150 mm 6 inches above direct burial cables and
duct lines. Where trenches or duct lines intersect, counterpoise wires shall be electrically interconnected
wires by exothermic welding or brazing. Counterpoise shall be connected to earth ground at every [600 m] [_____]
m [2,000] [_____] feetof cable run, at lighting vault, and at feeder connection to light circuit by means of
ground rods as specified. The counterpoise shall be installed in a separate duct under roads, railroads, and
paved areas above the highest duct containing electrical or communications circuits.
3.15.2 Fixture Grounding
Each fixture or group of adjacent fixtures shall be grounded by a grounding circuit separate from the counterpoise
system unless required otherwise or by driven ground rods if permitted. Fixtures, steel light bases or grounding
bushings on steel conduits shall be connected to an independent ground rod by a No. 6 AWG base-stranded copper
wire. Semiflush fixtures for direct mounting in pavement need not be grounded. Copper wire shall be connected
to ground rods by exothermic weld or brazing.
3.16 MARKING AND LIGHTING OF AIRWAY OBSTRUCTIONS
NOTE: If Section 09 90 00 PAINTS AND COATINGS is included, painting requirements
should be transferred to it. Local conditions may necessitate modification
to the following paragraph. Refer to FAA AC 70/7460-1 for further marking of
obstructions.
Towers, poles, smokestacks, buildings of certain shapes and sizes, and other obstructions shall be marked and
lighted in accordance with FAA AC 70/7460-1 and as indicated.
3.16.1 Painting of Airway Obstructions
Patterns and colors to mark obstructions shall conform to FAA AC 70/7460-1 and be as indicated.
3.16.2 Obstruction Marker Lights
Install obstruction marker lights on radio towers, elevated water tanks, smokestacks, buildings, and similar
structures with 25 mm one-inch zinc-coated rigid steel conduit stems using standard tees and elbows, except that
where lowering devices are required, equipment shall be installed in accordance with manufacturer's recommendations.
3.17 HELIPAD LIGHT BEACON
Install helipad light beacon in accordance with specifications and manufacturer's instructions, including those
for cleaning, lubrication, adjustment, and other special instructions. Provide foundations and support as indicated.
3.17.1 Beam Adjustment
Adjust beam during hours of darkness aimed a minimum of 5.5 degrees above the horizontal, but not higher than
necessary to clear principal obstructions.
3.17.2 Power Supply and Wiring
Install panelboard at top of structure to provide separately protected circuits for beacon lamps, heaters, motor,
and obstruction lights. Locate cabinet on side of platform opposite ladder. Install conduit riser on tower
in a corner angle and not located near ladder.
3.18 WIND DIRECTION INDICATOR
Installation shall include a 7.5 m 25 foot black circle constructed on the ground with center at center of the
wind cone base. Circle shall be constructed of an emulsified asphalt-sand mixture or of a cut-back asphalt-sand
mixture not less than 125 mm 5 inches in thickness. Asphalt-sand mixture shall contain not less than 6 percent
bitumen. Sand shall be well graded with not more than 10 percent material which will pass through a No. 200
mesh sieve. Asphalt-sand mixture shall be compacted thoroughly and sloped for drainage from center to outer
rim from one side to the other. Wind cone direction indicator shall be guyed as indicated. The obstruction
lights shall be energized from [multiple] [series] [series or multiple circuits] as required by the contract
drawings.
3.19 HELIPAD GLIDE SLOPE INDICATOR
The helipad glide slope indicator, CHAPI, system shall be on an independently controlled power circuit.
3.20 ISOLATION TRANSFORMERS
Connect transformer primary leads to primary cables with connectors conforming to FAA AC 150/5345-26. Transformer
secondary shall be connected with connectors conforming to FAA AC 150/5345-26 and plugged directly into a mating
connector on the transformer secondary leads. During installation, mating surfaces of connectors shall be kept
covered until connected and clean when plugged together. At joint where connectors come together, heat shrinkable
tubing shall be installed with waterproof sealant. [Alternately, the Contractor may provide two half-lapped
layers of tape over the entire joint.] Joint shall prevent entrapment of air which might subsequently loosen
the joint.
3.21 FIELD QUALITY CONTROL
Notify the Contracting Officer [5] [_____] working days prior to [each] [_____] test[s]. Deficiencies found
shall be corrected and tests repeated.
3.21.1 Distribution Conductors, 600-Volt Class
Conductors shall be tested to verify that no short circuits or accidental grounds exist using an instrument which
applies a voltage of approximately 500 volts to provide a direct reading in resistance.
3.21.2 Counterpoise System Test and Inspection
Continuity of counterpoise system shall be inspected at accessible locations. Continuity of counterpoise system
to the vault grounding system in manhole closest to the vault shall be tested.
3.21.3 Progress Testing for Series Helipad Lighting Circuits
NOTE: Progress testing should be specified when replacing or modifying existing
series airfield, heliport, or helipad lighting circuits since interruption time
is usually critical; however, progress testing on completely new series helipad
lighting circuits is not normally necessary.
Conduct a megger test on each section of circuit or progressive combinations of sections as they are installed.
Each section or progressive combination of sections shall be checked with a megohmmeter providing a voltage of
approximately 1000 volts to provide a direct reading in resistance, and document results. Faults indicated by
these tests shall be eliminated before proceeding with the circuit installation.
3.21.4 Electrical Acceptance Tests
Perform acceptance tests for series and multiple helipad lighting circuits only on complete lighting circuits.
Each series and multiple lighting circuit shall be tested for high voltage insulation resistance.
3.21.4.1 Low Voltage Continuity Tests
Test each series circuit for electrical continuity. Faults indicated by this test shall be located and eliminated
before proceeding with the high voltage insulation resistance test.
3.21.4.2 High-Voltage Insulation Resistance Tests
Test each series lighting circuit for high-voltage insulation resistance by measuring the insulation leakage
current using a suitable high-voltage test instrument with a steady, filtered direct current output voltage and
limited current. High-voltage tester shall include an accurate voltmeter and microammeter for reading voltage
applied to the circuit and resultant insulation leakage current. Voltages shall not exceed test values specified
below.
a. Test Procedure: Both leads shall be disconnected from regulator output terminals and support so
that air gaps of several inches exist between bare conductors and ground. Cable sheaths shall be clean
and dry for a distance of 300 mm one foot from ends of cables and exposed insulation at ends of cables.
Ends of both conductors of the circuit shall be connected together and to high-voltage terminals of test
equipment, and test voltage applied as specified between conductors and for a period of 5 minutes as
follows:
Test Voltage, dc
First Test Test on
Series on New Existing
Lighting Circuits Circuits Circuits
High Intensity Series
Lighting Circuits
(5,000-Volt Leads,
500- and 200-Watt
Transformers) 9000 5000
Medium Intensity
Series Lighting
Circuits (5,000-Volt
Leads, 30/45-Watt
Transformers) 6000 3000
600-Volt Circuits 1800 600
When additions are made to existing circuits, only new sections shall be tested in accordance with "First Test on
New Circuits" in this table. To ensure reliable operation, complete circuit shall be tested at reduced voltages
indicated.
b. Leakage Current: Insulation leakage current shall be measured and recorded for each circuit after
a one-minute application of the test voltage. If leakage current exceeds values specified below, the
circuit shall be sectionalized and re-tested and the defective parts shall be repaired or replaced.
Leakage current limits include allowances for the normal number of connectors and splices for each circuit
as follows:
1. Three microamperes for each 300 m 1000 feet of cable.
2. Two microamperes for each 200-Watt and each 500-Watt 5,000-volt series transformer.
3. Two microamperes for each 30/45-Watt 5,000 volt series transformer.
c. If measured value of insulation leakage current exceeds calculated value, the circuit shall be sectionalized
and specified test repeated for each section. Defective components shall be located and repaired or
replaced until repeated tests indicate an acceptable value of leakage current for the entire circuit.
3.21.5 Constant Current Regulator
Examine each constant current regulator to ensure that porcelain bushings are not cracked, no shipping damage
has occurred, internal and external connections are correct, switches and relays operate freely and are not tied
or blocked, fuses, if required, are correct, and liquid level of liquid-filled regulators is correct. Relay
panel covers shall be removed for this examination; it is not necessary to open the main tank of liquid-filled
regulators. The instructions on the plates attached to the regulators shall be followed. Covers shall be replaced
tightly after completing examinations and tests.
3.21.6 Regulator Electrical Tests
Supply voltage and input tap shall correspond. With the loads disconnected, regulator shall be energized and
the open circuit protector observed to ensure that it de-energizes the regulator within 3 seconds. After testing
circuits for open-circuit and ground faults and corrections, if any, and after determining that lamps are serviceable
and in place, the loads shall be connected for each circuit or combination of circuits to be energized to the
regulator and the voltage and current measured simultaneously for each brightness tap. Voltmeter and ammeter
shall have an accuracy of plus or minus one percent full scale. Readings shall be recorded during the day and
night in order to obtain the average supply voltage. Output current for each brightness tap shall be within
plus or minus 2 percent of meter full scale of the nameplate values after making necessary correction in the
supply voltage. Late model regulators have automatic supply voltage correction in lieu of input taps, and output
current does not change as supply voltage varies. When output current on full intensity deviates from nameplate
value by more than 2 percent of meter full scale and the regulator is not overloaded, internal adjustment shall
be checked as described on regulator instruction plate. Since adjustment may be rather delicate, a deviation
shall be allowed of up to plus or minus 5 percent of meter full scale on taps 1 through 4 before attempting to
readjust the regulator.
3.22 FINISHING
Painting required for surfaces not otherwise specified and finish painting of items only primed at the factory,
shall be as specified in Section 09 90 00 PAINTS AND COATINGS.
3.23 TRAINING
Provide training on the proper operation and maintenance procedures for the system. Submit information describing
training to be provided, training aids to be used, samples of training materials, and schedules. Training shall
include a list of special tools and test equipment required for maintenance and testing of the products supplied
by the Contractor; a list of parts and components for the system by manufacturer's name, part number, nomenclature,
and stock level required for maintenance and repair necessary to ensure continued operation with minimal delays;
instructions necessary to checkout, troubleshoot, repair, and replace components of the systems, including integrated
electrical and mechanical schematics and diagrams and diagnostic techniques necessary to enable operation and
troubleshooting after acceptance of the system.
3.24 Final Operating Test
After completion of installations and the above tests, the circuits, control equipment, and lights covered by
the contract shall be demonstrated to be in good operating condition. Each switch in the helipad and/or control
tower lighting panels shall be operated so that each switch position is engaged at least twice. During this
process, lights and associated equipment shall be observed to determine that each switch properly controls corresponding
circuit. Telephone or radio communication shall be provided between the operator and the observers. Tests shall
be repeated from the alternate control station, from the remote control points, and again from the local control
switches on the regulators. Each lighting circuit shall be conducted by operating the lamps at maximum brightness
for not less than 30 minutes. At the beginning and at the end of this test, the correct number of lights shall
be burning at full brightness. [One] [_____] day and [one] [_____] night operating test shall be conducted for
the Contracting officer. Submit field test reports written, signed and provided as each circuit or installation
item is completed. Field tests shall include resistance-to-ground and resistance between conductors, and continuity
measurements for each circuit. For each series circuit the input voltage and output current of the constant
current regulator at each intensity shall be measured. For multiple circuits the input and output voltage of
the transformer for each intensity setting shall be measured. A visual inspection of the lights operation, or
of the markings appearance, or of the installation of fixtures or units installed shall be reported.
3.25 POSTED INSTRUCTIONS
Submit a typed copy of the proposed posted instructions showing wiring, control diagrams, complete layout and
operating instructions explaining preventive maintenance procedures, methods of checking the system for normal
safe operation, and procedures for safely starting and stopping the system.