Power Wiring - Color Codes
Color codes used in power wiring.
Typical power wiring color codes
120/240 Volt
- black - phase 1
- red - phase 2
- blue - phase 3
- white or with 3 white stripes - neutral
- green - ground
277/480 Volt
- brown - phase 1
- orange - phase 2
- yellow - phase 3
- gray or with 2 white stripes
- green with yellow stripe - ground