2.8.3.2
Boxes, Nonmetallic, Outlet and Flush-Device Boxes and Covers
NEMA OS 2 and UL 514C.
2.8.3.3
Boxes, Outlet for Use in Hazardous (Classified) Locations
UL 886.
2.8.3.4
Boxes, Switch (Enclosed), Surface Mounted
UL 98.
2.8.3.5
Fittings for Conduit and Outlet Boxes
UL 514B.
2.8.3.6
Fittings for Use in Hazardous (Classified) Locations
UL 886.
2.8.3.7
Fittings, PVC, for Use with Rigid PVC Conduit and Tubing
UL 514B.
2.8.4
Non-Metallic Duct
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NOTE: Only polyvinyl chloride and high-density
polyethylene conduits are presently covered by UL
651, which includes a temperature rating clause.
Other plastic materials are covered by NEMA
Standards, which do not provide a temperature rating
clause. All options will be permitted and the
temperature certification required until these
materials are covered by an industry temperature
rating clause.
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Non-metallic duct lines and fittings utilized for underground installation
shall be suitable for the application. Duct shall be thick-wall, single,
round-bore type. Material of one type shall be used.
Acrylonitrile-butadiene-styrene (ABS) duct shall conform to NEMA TC 6 & 8
and NEMA TC 9. High-density conduit shall conform to UL 651A. Schedule 40
polyvinyl chloride (PVC) shall conform to UL 651. Plastic utility duct and
fittings manufactured without a UL label or listing shall be provided with
a certification as follows: "The materials are suitable for use with 75
degree C 167 degree F wiring. No reduction of properties in excess of that
specified for materials with a UL label or listing will be experienced if
samples of the finished product are operated continuously under the normal
conditions that produce the highest temperature in the duct."
2.9
WOOD CROSSARMS
Douglas fir or dense southern pine of sizes specified or indicated, with
pressure treatment conforming to AWPA C25.
2.10
GROUND RODS
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SECTION 16528A
Page 20
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