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The provisions of Article 501 of NFPA 70 are adopted by reference with the following modifications:
1. Revise subsections 501.10(A)(1) and (A)(2) to read:
“(1) General. In Class I, Division 1 locations, the wiring methods in (a) through (c) shall be permitted.
(a) Threaded rigid metal conduit or threaded steel intermediate metal conduit.
(b) Type MI cable terminated with fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings.
(c) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN and OFC shall be permitted to be installed in raceways in accordance with 501.10(A). These optical fiber cables shall be sealed in accordance with 501.15.
(2) Flexible Connections. Where necessary to employ flexible connections, as at motor terminals, one of the following shall be permitted:
(1) Flexible fittings listed for the locations
(2) Flexible cord in accordance with the provisions of 501.140, terminated with cord connectors listed for the location.”
2. Revise subsections 501.10(B)(1) and (B)(2) to read:
“(1) General. In Class I, Division 2 locations, the following wiring methods shall be permitted:
(1) All wiring methods permitted in 501.10(A).
(2) Enclosed gasketed busways and enclosed gasketed wireways.
(3) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725. The cable shall be terminated with listed fittings.
(4) Type MV and the cable shall be terminated with listed fittings.
(5) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in any raceway in accordance with 501.10(B). Optical fiber cables shall be sealed in accordance with 501.15.
(2) Flexible Connections. Where provision must be made for limited flexibility, one or more of the following shall be permitted:
(1) Listed flexible metal fittings.
(2) Flexible metal conduit with listed fittings.
(3) Liquidtight flexible metal conduit with listed fittings.
(4) Flexible cord listed for extra-hard usage and terminated with listed fittings. A conductor for use as an equipment grounding conductor shall be included in the flexible cord.
(5) For elevator use, an identified elevator cable of Type EO, ETP, or ETT, shown under the “use” column in Table 400.4 for “hazardous (classified) locations” and terminated with listed fittings.
Informational Note: See 501.30(B) for grounding requirements where flexible conduit is used.”
(Added Coun. J. 9-6-17, p. 55278, Art. I, § 1)