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Connecting wire splicing shall be made with copper compression connectors
or exothermic welds, following instructions of the manufacturer. Single
split-bolt connections shall not be used. Sheaths for encapsulating
electrical wire splices to be buried underground shall fit the insulated
wires entering the spliced joints and epoxy potting compound shall be as
specified below.
2.2.1.2
Test Wires
Test wires shall be AWG No. 12 stranded copper wire with NFPA 70, Type TW
or RHW or polyethylene insulation.
2.2.1.3
Resistance Wire
Resistance wire shall be AWG No. 16 or No. 22 nickel-chromium wire.
2.2.2
Conduit
Rigid galvanized steel conduit and accessories shall conform to UL 6.
Non
metallic conduit shall conform to NEMA TC 2.
2.2.3
Test Boxes and Junctions Boxes
Boxes shall be outdoor type conforming to UL 514A.
2.2.4
Joint, Patch, Seal, and Repair Coating
Sealing and dielectric compound shall be a black, rubber based compound
that is soft, permanently pliable, tacky, moldable, and unbacked. Compound
shall be applied as recommended by the manufacturer, but not less than 13
mm 1/2-inch thick.
Coating compound shall be [cold-applied coal-tar base
mastic] [hot-applied coal-tar enamel]. Pressure-sensitive vinyl plastic
electrical tape shall conform to UL 510.
2.2.5
Backfill Shields
Shields shall consist of approved pipeline wrapping or
fiberglass-reinforced, coal-tar impregnated tape, or plastic weld caps,
specifically made for the purpose and installed in accordance with the
manufacturer's recommendations. When joint bonds are required, due to the
use of mechanical joints, the entire joint shall be protected by the use of
a kraft paper joint cover. The joint cover shall be filled with poured-in,
hot coat-tar enamel.
2.2.6
Epoxy Potting Compound
Compound for encapsulating electrical wire splices to be buried underground
shall be a two package system made for the purpose.
2.2.7
Test Stations
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NOTE: Retain bracketed sentences only when
nonmetallic materials are used in the project.
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Stations shall be of the [aboveground] [flush-curb-box type] and shall be
SECTION 13110A
Page 17
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