SECTION 16370

OVERHEAD POWER DISTRIBUTION

PART 1 GENERAL

SECTION INCLUDES

Poles and crossarms.

Pole hardware.

Overhead line conductors.

REFERENCES

ANSI/IEEE C2 - National Electrical Safety Code

ANSI C29.2 - Insulators - Wet-Process Porcelain and Toughened Glass - Suspension Type.

ANSI C29.3 - Wet-Process Porcelain Insulators - Spool Type.

ANSI C29.4 - Wet-Process Porcelain Insulators - Strain Type.

ANSI C29.5 - Wet-Process Porcelain Insulators - Low and Medium Voltage Type.

ANSI C29.7 - Wet-Process Porcelain Insulators - High-Voltage Line-Post Type.

ANSI C37.42 - Specifications for Distribution Cutouts and Fuse Links.

ANSI C135.1 - Galvanized Steel Bolts and Nuts for Overhead Line Construction.

ANSI C135.2 - Threaded Galvanized Ferrous Strand-Eye Anchor Rods and Nuts for Overhead Line Construction.

ANSI C135.4 Galvanized Ferrous Eyebolts and Nuts for Overhead Line Construction.

ANSI C135.5 - Galvanized Ferrous Eyenuts and Eyelets for Overhead Line Construction.

ANSI C135.17 - Galvanized Ferrous Bolt-Type Insulator Pins with Lead Threads for overhead Line Construction.

ANSI C135.22 - Galvanized Ferrous Pole-Top Insulator Pins with Lead Threads for Overhead Line Construction.

ANSI C135.30 - Galvanized Ferrous Ground Rods for Overhead or Underground Line Construction.

ANSI C135.31 - Galvanized Ferrous Single and Double Upset Spool Insulator Bolts for Overhead Line Construction.

ANSI 05.1 - Specifications and Dimensions for Wood Poles.

ASTM A475 - Zinc-Coated Steel Wire Strand.

ASTM A675 - Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties.

ANSI/ASTM B1 - Hard-Drawn Copper Wire.

ANSI/ASTM B2 - Medium-Hard-Drawn Copper Wire.

ASTM B3 - Soft or Annealed Copper Wire.

ASTM B8 - Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft.

ANSI/ASTM B228 - Concentric-Lay-Stranded Copper-Clad Steel Conductors

ANSI/ASTM B232 - Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Reinforced (ACSR).

ASTM D390 - Coal-Tar Creosote for the Preservative Treatment of Piles, Poles, and Timers for Marine, Land, and Fresh Water Use.

AWPA C4 - Standard for the Preservative Treatment of Poles by the Pressure Process.

AA. AWPA C25 - Standard for the Preservative Treatment of

Crossarms by the Pressure Process.

BB. FS TT-W-571 - Wood Preservation: Treating Practices.

CC. NEMA LA1 - Surge Arrestors.

DD. ANSI/UL 96 - Lightning Protection Components

SYSTEM DESCRIPTION

Overhead distribution line consisting of [one] [_____] circuit operating at [_____] kV, [from [_____] to [__________.]] [as shown on Drawings.]

Terminate overhead distribution circuit at [aerial] [underground] service from [__________] and at [aerial] [underground] service to [__________.]

DESIGN REQUIREMENTS

Comply with ANSI/IEEE C2, [__________] loading conditions, Grade [___] construction.

SUBMITTALS

Submit shop drawings under the provisions of Section [01300.] [01340.]

Submit shop drawings indicating location and details of pole line construction.

Submit product data under the provisions of Section [01300.] [01340.]

Submit product data indicating materials and construction of hardware and line conductors.

PROJECT RECORD DOCUMENTS

Submit documents under provisions of Section [01700.] [01720.]

Accurately record exact locations of poles, guys, anchors, and required horizontal and vertical clearances.

QUALITY ASSURANCE

Installer: Company specializing in applying work of this Section with minimum [three] [_____] years [documented] experience.

DELIVERY, STORAGE, AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Accept poles and hardware on site and inspect for damage.

Protect poles from damage and decay by stacking to provide free circulation of air. Maintain one foot (300 mm) minimum spacing between bottom pole and ground or ground vegetation. Do not store poles above decayed or decaying wood.

Stack poles stored for more than two weeks on creosoted or decay-resistant skids arranged to support poles without noticeable pole distortion.

Handle treated poles with tools which will not produce an indentation greater than one inch (25 mm) deep. Do not drag treated poles along ground. Do not apply tools to that section of treated poles between one foot (300 mm) above and 2 feet (600 mm) below ground line.

PART 2 PRODUCTS

POLES

Wood Poles: ANSI 05.1; treated [Douglas fir] [Southern pine] poles of [minimum length and class indicated.] [[_____] feet ([_____] m) length minimum, Class [_____] minimum.]

Select poles for straightness and minimum sweeps and short crooks.

Preservative: ASTM D390.

Apply preservative to [AWPA C4] [FS TT-W-571] with minimum net retention of 12 lbs/cu ft (285 kg/cu m). Obtain complete sapwood penetration.

CROSSARMS

Crossarms and Timbers: Straight-grained [Douglas fir] [Southern pine], free of twists to within 0.1 inch per foot (8 mm per m) of length, with bends and twists in only one direction.

Apply preservative to poles to AWPA C25 with minimum net retention of 8 lbs/cu ft (190 kg/cu m).

Crossarm Dimensions: [4.25 x 5.25 inches x 9 feet (108 x 133 mm x 2.7 m).] [_________________________.]

POLE HARDWARE

Miscellaneous Pole Hardware: Hot-dipped galvanized after fabrication.

Crossarm Braces: Structural steel zinc coated to ASTM A675.

Angle Braces: 60 inch span x 18 inches (1.5 m span x 450 mm), drop-formed in one piece from 1-3/4 x 1-3/4 inch (45 x 45 mm) angle.

Flat Braces: 1/4 x 1-1/4 inch (6 x 32 mm).

Eye Bolts and Nuts: ANSI C135.4.

Anchor Rods and Nuts: ANSI C135.2

Bolts and Nuts: ANSI C135.1

Eyenuts and Eyelets: ANSI C135.5.

Ground Rods: ANSI C135.30.

Butt Plate: Copper.

Bolt-type Insulator Pins: ANSI C135.17.

Pole-top Insulator Pins: ANSI C135.22

Spool Insulator Bolts: ANSI C135.31.

Hot-line Clamps: Screw type with concealed threads. Fill thread chamber with corrosion-resistant compound.

Secondary Racks: Furnish with spool insulators.

Guy Strand: High strength 7-strand steel cable galvanized to ASTM A475, Class A or B.

Guy Termination: [Automatic] [Preformed] [Three-bolt clamp] type.

Guy Guards: 8 foot (2 m) long [galvanized steel] [Plastic], colored [yellow.] [__________.]

Ground Wire: Soft drawn copper conductors, 6 AWG minimum size.

Air Terminal: ANSI/UL 96; [_____] inch ([_____] mm) high copper air terminal.

INSULATORS

Insulators: Radio interference free wet process porcelain insulators with minimum wet flashover rating of 80 kV.

Line Post Insulators: ANSI C29.7; Class [_____].

Suspension Insulators: ANSI C29.2; Class [_____].

Spool Insulators: ANSI C29.3; Class [_____].

Pin Insulators: ANSI C29.5; Class [_____].

Guy Strain Insulators: ANSI C29.4; Class [_____].

LINE CONDUCTORS

Medium Voltage Overhead Line Conductors: Bare [copper] [copper clad steel] [aluminum conductor steel reinforced (ACSR)].

Copper Conductors: [ANSI/ASTM B1; hard-drawn solid copper.] [ANSI/ASTM B2; Medium-hard-drawn solid copper.] [ASTM B3; soft-drawn solid copper.] [ASTM B8; stranded copper.]

Copper Clad Steel Conductors: ANSI/ASTM B228.

Aluminum Conductor Steel Reinforced Line: ANSI/ASTM B232.

Secondary Conductors: [Aluminum] [Copper], [single conductor] [triplex] [quadraplex] cable with [300] [600] volt [cross-linked polyethylene] [neoprene] insulation for phase conductors. [Use bare [ACSR] [Aluminum alloy] [copper] messenger for neutral.]

ARRESTERS AND CUTOUTS

Surge Arresters: NEMA LA1; valve type, arranged for crossarm mounting, and rated [3] [6] [9] [12] [15] [___] kV.

Fused Cutouts: ANSI C37.42; [enclosed] [drop-out] [expulsion] fused cutouts rated [100] [200] [___] amperes at [14.4] [___] kV ungrounded.

Fuses: Type [K] [T], rated [as indicated] [[_____] amperes.] [_________________________.].

PART 3 EXECUTION

EXAMINATION

Verify that site is ready to receive work.

Verify field measurements are as shown on Drawings.

Verify that required utilities are available, in proper location and ready for use.

Beginning of installation means installer accepts existing conditions.

INSTALLATION

Plug unused holes in poles using treated wood dowel pins. Treat field-cut gains and field-bored holes with preservative.

Cut gains on face of pole, with gained surfaces in parallel planes.

Shorten poles when required by cutting from top end.

Apply hot preservative to shortened end of pole.

Set poles in straight line. Place curved poles with curvature in line with lead pole. Maintain an even grade.

Dig setting holes large enough to permit use of tampers to full depth. Place earth in maximum 6 inch (150 mm) layers and pack to 45 percent density.

Rake poles located at corners, angles, and dead ends so that poles are vertical after line installation.

Do not install poles along the edge of cuts and embankments or where soil may be washed out.

Identify each pole using aluminum marker stamped with characters 2-1/2 inches (60 mm) high minimum. Locate to provide maximum visibility [from roadway] and fasten with aluminum nails. Obtain identifying numbers from [____________________.]

Set crossarms at right angles to line for straight runs; and to bisect the angle of turns in line direction.

Provide two braces for each crossarm.

Install conductors to ANSI/IEEE C2.

FIELD QUALITY CONTROL

Field testing will be performed under provisions of Section [01400.] [01410.]

Field test at least one anchor of each capacity installed to rated holding power.

POLE SETTING SCHEDULE

Minimum depths in normal firm ground, measured from lower side of pole:

DEPTH_AT_CURVES,

CORNERS,_AND

DEPTH_FOR_STRAIGHT-	POINTS_OF_EXTRA

OVERALL_LENGTH	LINES	STRAIN

30' - (9.1m)	5'-6" - (1.7m)	5'-6" - (1.7m)

35' - (10.6m)	6'-0" - (1.8m)	6'-0" - (1.8m)

40' - (12.2m)	6'-6" - (2.0m)	7'-0" - (2.2m)

50' - (15.2m)	7'-6" - (2.3m)	8'-0" - (2.4m)

60' - (18.2m)	8'-0" - (2.4m)	8'-6" - (2.6m)

70' - (21.3m)	9'-6" - (2.9m)	10'-0" - (3.0m)

80' - (24.3m)	10'-6" - (3.2m)	11'-6" - (3.5m)

90' - (27.4m)	12'-6" - (3.8m)	13'-6" - (4.1m)

100' - (30.4m)	14'-6" - (4.4m)	16'-0" - (4.9m)

END OF SECTION