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Division 10 — Utilities

1091ELECTRICAL MATERIALS

NC · 2024 Standard SpecificationsBook pages 622625View official source ↗
(2)Apparel Verification

All safety apparel shall have the original tag or label indicating that it meets the requirements of the ANSI/ISEA 107- 2010 or the equivalent revision. Approval All safety apparel is subject to the approval of the Engineer. PORTABLE CONCRETE BARRIER 1090 -1 PORTABLE CONCRETE BARRIER

(A)General

Use portable concrete barrier that meets Section 854, Section 1077 and the plans. The requirement for approved galvanized connectors will be waived if the barrier remains the property of the Contractor. Use p ortable concrete barrier as found on the NCDOT APL. Products manufactured prior to December 31, 2019 shall meet NCHRP 350 or MASH crash requirements for Category III work zone devices.

(B)Material Certifications

All portable concrete barriers will have either a RFID tag/label tagged in accordance with portable concrete barrier does not have an RFID tag/label, f urnish a Type 3 material certification in accordance with Article 106-3 for all new portable concrete barrier and a Type 7 material certification for all used portable concrete barrier before use.

(C)Anchor Bolts

Use anchor bolts that meet ASTM F 3125.

(D)Approval

All materials are subject to the approval of the Engineer. ELECTRICAL MATERIALS -1 GENERAL REQUIREMENTS

(A)New Materials

Furnish new equipment, materials and hardware unless otherwise specified.

(B)Electrical Industry Standards

Provide electrical mat erials in accordance with the appropriate UL standard when such standard is identified in the plans. All electrical materials shall be listed with a qualified testing laboratory that is approved by the North Carolina Department of Insurance, Office of Sta te Fire Marshal such as UL, Intertek, ETL or CSA .

(C)Certification

Furnish a Type 3 material certification in accordance with Article 106 -3. -2 Wire and Cable Use only stranded copper conductors, unless otherwise shown in the contract Provide wire and cable with identification labels or tags on either the wire or cable itself or on the coil, reel or smallest container in which the product is packaged when delivered to t he project. Show the manufacturer’s name, gauge, UL symbol and type of wire or cable on the identification label or tag. When requested by the Department, furnish samples of wire and cable to the Department at no additional cost.

Use wire and cable of th e type and size shown in the contract meeting the following applicable UL standards at minimum : 44, 83, 493, 719, 854, 1063 and 1581. Where required by the plans, use soft or annealed solid bare copper wire conforming to ASTM B3. -3 CONDUIT

(A)Conduit Bodies, Boxes and Fittings

Use conduit bodies, boxes, and fittings that meet UL Standard 514A or 514B for electrical and communications installations.

(B)Rigid Metallic Conduit

Provide rigid hot dipped galvanized steel conduit that meets UL Standard 6 with rigid full weight sherardized or galvanized threaded fittings.

(C)PVC Conduit

Provide non- metallic conduit and duct including associated couplings, approved f or above and below ground use with or without concrete encasement in accordance with UL Standard 651. Provide Schedule 40 conduit unless otherwise specified.

(D)Liquid -Tight Flexible Metal Conduit (LFMC)

Provide conduit that meets UL Standard 360. If used a s an equipment grounding conductor, LFMC must meet the equipment grounding requirements of the NEC. Ensure conduit has insulated throat and malleable iron watertight fittings.

(E)Liquid -Tight Flexible Nonmetallic Conduit

Provide conduit that meets UL Standar d 1660.

(F)Solid Wall HDPE Conduit

Use HDPE conduit that conforms to UL Standard 651A . Provide conduit meeting Table 1091- 1 with minimum wall thickness ratios corresponding to EPEC -40 (Schedule 40), EPEC -80 (Schedule 80) or EPEC -B (SDR 13.5) as listed in UL Standard 651A and Table 1091 -1. TABLE 1091 -1 HDPE CONDUIT SIZE Conduit Trade Size Furnish 1" EPEC -40 1 1/4" EPEC -40 1 1/2" EPEC -B (SDR 13.5) 2" EPEC -B (SDR 13.5) 2 1/2" EPEC -B (SDR 13.5) 3" EPEC -B (SDR 13.5) 4" EPEC -B (SDR 13.5) 5" EPEC -80 6" EPEC -80 Ensure the polyethylene ( PE) resin compounds used in manufacturing the conduit meet or exceed the cell classification PE 3344 80C (black with 2% minimum carbon black) or PE 3344 80E (colored conduit with UV inhibitors) in ASTM D3350 and Table 1091- 2.

Furnish conduits in the colors for the applications shown in Table 1091- 3. For conduits manufactured with stripes, ensure that a minimum of three stripes are uniformly spaced around the conduit with 120 degrees of separation. Do not use “Solid Yellow” or “Black with Yellow Stripes” conduit. Ensure the HDPE conduit is resistant to benzene, calcium chloride, ethyl alcohol, fuel oil, gasoline, lubricating oil, potassium chloride, sodium chloride, sodium nitrate and transformer oil and is protected against degradation due to oxidation and general corrosion. Furnish conduit with a coefficient of friction of 0.10 or less in accordance with Telcordia GR-356. Ensure the supplied conduit is identified and certified as meeting, UL Standard 651A . Ensure the conduit is marked at least with the following information on 5 feet or less intervals:

(1)Material : HDPE
(2)Trade Size: i.e., 2 inches
(3)Conduit Type: SDR 13.5 or EPEC -B
(4)Manufacturer’s name or trademark
(5)Manufacturer’s production code to identify manufacturing date, facility, etc.
(6)NRTL symbol or listing number 18 TABLE 1091 -2

RESIN PROPERTIES Property Requirement Test Method Density 0.940 - 0.947g/cm3 ASTM D1505 ASTM D792 ASTM D4883 Melt Index (condition 190/2.16 is acceptable) < 0.4 grams/10 minutes ASTM D1238 Flexural Modulus 80,000 psi, min. ASTM D790 Tensile Strength Tensile Strength 3,000 psi, min. ASTM D638 Elongation Elongation 400%, min. ASTM D638 Slow Crack Growth Resistance An ESCR as per condition B, 10% IGEPAL requirement of F 10>96 hrs is allowable ASTM D1693 Hydrostatic Design Basis “0” for Non -Pressure Rated Pipe ASTM D2837 UV Resistance (Outdoor Conduit Only) Stabilize with at least 2% by weight carbon black or colored with UV Inhibitor ASTM D4218 TABLE 1091 -3 CONDUIT COLORS Conduit Contents Preferred Solid Color Alternate Signal Cable Black None Loop Lead -in Cable White Black with White Stripes Communication Cable (Copper, Fiber -Optic, Coaxial) Orange Black with Orange Stripes Electrical Power Cable Red Black with Red Stripes

Furnish coilable conduit that is supplied on reels in continuous lengths for transportation and storage outside. Ensure that the process of installing the coilable conduit on the reel does not alter the properties or performance of the conduit for its intended purpose.

(G)Conduit Plugs, Pul l Line and Tracer Wire

Furnish conduit plugs that provide a watertight barrier when installed in conduit. Furnish conduit plugs sized in accordance with conduit. Ensure conduit plug provides a means to secure a pull line to the end of the plug. Provide removable and re -usable conduit plugs. Conduit plugs are not required to be listed electrical devices. For all spare conduits, furnish woven polyester pull tape with a minimum rated tensile strength of 2,500 lbs. Pull lines are not required to be listed electrical devices. Provide green insulated number 14 AWG, THW N, stranded copper wire to serve as tracer wire. -4 DUCT AND CONDUIT SEALER Use duct and conduit sealer or mastic which is a putty -like compound and:

(A)Is permanently non- hardening, non- oxidizing, and non- corrosive to metals, rubber, plastic,

lacquer and paints;

(B)Is readily workable for thumbing into openings and forming into seals around wires inside

conduits and openings around conduits;

(C)Has a service temperature range of minus 30°F to 200°F;
(D)Is clean, non -poisonous and non- injurious to human skin;
(E)Seals against water, dust and air and shall adhere to wood, glass, plastics, metal, rubber

and painted surfaces; and

(F)Is non- conductive.

-5 ELECTRICAL JUNCTION BOXES

(A)General

Provide electrical junction boxes with covers of the type and size indicated by the c ontract or plans for the termination of conduits.

(B)Polymer Concrete (PC) Junction Boxes

Provide polymer concrete (PC) boxes which have bolted covers and open bottoms. Provide vertical extensions of 6 inches to 12 inches as required by project provisions . Use polymer concrete material made of an aggregate consisting of sand and gravel bound together with a polymer and reinforced with glass strands to fabricate box and cover components which are exposed to sunlight. Other thermoplastic materials may be used for components which are not normally exposed to sunlight. Provide certification that the polymer concrete boxes and covers meet Tier 15 requirements of ANSI/SCTE 77. Provide certification that testing methods are compliant with ANSI/SCTE 77. Provide the required logo on the cover. Provide at least two size 3/8 inch diameter hex head stainless steel cover bolts to match inserts in the box. Provide pull slot(s) with stainless steel pin(s). Polymer concrete junction boxes are not required to be listed electrical devices.

(C)Cast Metal (BR /SW) Junction Boxes

Provide three -piece cast-metal barrier rail (BR) box with replaceable flange, or two- piece cast metal side walk (SW) box with non- replaceable flange, as shown in the plans. The

Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 622625 of 857.