(a) Cable and wiring in hazardous locations must meet the cable construction and testing provisions of IEEE 1580; UL 1309; MIL-DTL-24640C; MIL-DTL-24643C; or IEC 60092-350:2008 and IEC 60092-353:2011 (incorporated by reference, see §110.10-1), including the respective flammability tests contained therein, and must be of a copper-stranded type.

(b) Type MC cables, when used, must meet the requirements in §111.60-23 of this part.

(c) For intrinsically safe systems under the standards cited in §111.106-3(b)(1) and (b)(2) of this subpart, the wiring methods must meet Section 504.30 of NFPA 70 (incorporated by reference, see §110.10-1). For intrinsically safe systems under the standards cited in §111.106-3(b)(3) of this subpart, the installation and wiring must meet Clause 7, except for Clause 7.3.1, of IEC 60092-502 (incorporated by reference, see §110.10-1).