The provisions of Article 502 of NFPA 70 are adopted by reference with the following modifications:
1. Revise subsections 502.10(A)(1) and (A)(2) to read:
"(1) General. In Class II, Division 1 locations, the wiring methods in (1) through (4) shall be permitted:
(1) Threaded rigid metal conduit, or threaded steel intermediate metal conduit.
(2) Type MI cable with termination fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings.
(3) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in raceways in accordance with 502.10(A). Optical fiber cables shall be sealed in accordance with 502.15.
(2) Flexible Connections. Where necessary to employ flexible connections, one or more of the following shall also be permitted:
(1) Dust-tight flexible connectors.
(2) Liquidtight flexible metal conduit with listed fittings.
(3) Interlocked armor Type MC cable having an overall jacket of suitable polymeric material and provided with termination fittings listed for Class II, Division 1 locations.
(4) Flexible cord listed for extra-hard usage and terminated with listed dust-tight fittings. Where flexible cords are used, they shall comply with 502.140.
Informational Note: See 502.30(B) for grounding requirements where flexible conduit is used."
2. Revise subsections 502.10(B)(1) and (B)(2) to read:
"(1) General. In Class II, Division 2 locations, the following wiring methods shall be permitted:
(1) All wiring methods permitted in 502.10(A).
(2) Rigid metal conduit, intermediate metal conduit, electrical metallic tubing, dust-tight wireways.
(3) Type MI cable with listed termination fittings.
(4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings.
(5) Type ITC and Type ITC-ER cable as permitted in 727.4 and terminated with listed fittings.
(6) Type MI, MV, TC, or TC-ER cable installed in ladder, ventilated trough, or ventilated channel cable trays in a single layer, with a space not less than the larger cable diameter between the two adjacent cables, shall be the wiring method employed.
(7) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in cable trays or any other raceways in accordance with 502.10(A). Optical fiber cables shall be sealed in accordance with 502.15
(2) Flexible Connections. Where provision must be made for flexibility, 502.10(A)(2) shall apply."