Buses and wiring.

(a) General. Each bus must meet the requirements of either— (1) Section 5.10 of IEEE 45.7-2012 (incorporated by reference; see § 110.10-1 of this subchapter); or (2) IEC 60092-302:1997 (clause 7) (incorporated by reference; see § 110.10-1 of this subchapter). (b) Wiring. Instrumentation and control wiring must be— (1) Suitable for installation within in a switchboard enclosure and be rated at 90 °C or higher; (2) Stranded copper; (3) No. 14 AWG (2.10 mm 2 ) or larger or must be ribbon cable or similar conductor size cable recommended for use in low-power instrumentation, monitoring, or control circuits by the equipment manufacturer; (4) Flame-retardant meeting test VW-1 of ANSI/UL 2556 or IEC 60332-1-1:2015 and IEC 60332-1-2:2015 (all incorporated by reference; see § 110.10-1 of this subchapter); and (5) Extra flexible, if used on a hinged panel. [CGD 94-108, 61 FR 28278, June 4, 1996, as amended at 62 FR 23908, May 1, 1997; USCG-2003-16630, 73 FR 65197, Oct. 31, 2008; USCG-2013-0671, 78 FR 60153, Sept. 30, 2013; USCG-2020-0075, 88 FR 16361, Mar. 16, 2023]