Electrical Wire Color Code Chart Usa. Nec standard wiring colour codes national electrical code is followed in the united states and sometimes in canada. 277 480 volt ac wire color codes. L line voltage single phase second hot wire.
120 208 240 volt ac wire color codes. 120v 240v a c electrical wiring color codes conventions. In europe and other countries there are different standards in place. Often used to indicate switched power.
Dc supply wire color codes.
Nec wiring color codes for ac us canada us nec ac single multi phase wiring color codes the mandatory colors for power wiring in national electric codes nec are green bare or green yellow yellow strip or band on green for protective ground pg and white alternatively grey for neutral wire. The us national electrical code only mandates white or grey for the neutral power conductor and bare copper green or green with yellow stripe for the protective ground. Ground wire is either a green wire a bare wire or a green wire with yellow stripe. Nec standard wiring colour codes national electrical code is followed in the united states and sometimes in canada. United states and canada.