U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
(a) Wire must be in an enclosure.
(b) Wire must be component insulated.
(c) Wire, other than in switchboards, must meet the requirements in ANSI/UL 44, ANSI/UL 83, MIL-DTL-76E (all three standards incorporated by reference; see § 110.10-1 of this subchapter), or equivalent standard.
(d) Switchboard wire must meet subpart 111.30 of this part.
(e) Wire must be of the copper stranded type.