46 CFR §111.30-19

1. (a)General. Each bus must meet the requirements of either—
   1. (1)Section 5.10 of IEEE 45.7-2012 (incorporated by reference; see § 110.10-1 of this subchapter); or
   2. (2)IEC 60092-302:1997 (clause 7) (incorporated by reference; see § 110.10-1 of this subchapter).
2. (b)Wiring. Instrumentation and control wiring must be—
   1. (1)Suitable for installation within in a switchboard enclosure and be rated at 90 °C or higher;
   2. (2)Stranded copper;
   3. (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. (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. (5)Extra flexible, if used on a hinged panel.