Black Red Blue Circuit Numbers. There is a voltage difference of 230v between the wires. Red and zero represent phase.
Phase a is circuit 1 and 2. You will need to shut off the circuit breaker before working with these wires. Web web phase a is circuit 1 and 2 (black), phase b is circuit 3 and 4 (red), phase c is circuit 5 and 6 (blue).
Web ac wire colors for 120/208/240 volts. Phase c circuits are always blue wire. Color 1 black 2 red 3 white 4 green 5 yellow 6 blue chart d2 no.
Web 1 black 2 red 3 blue 4 orange 5 yellow 6 brown conductor color 7 red/black 8 blue/black 9 orange/black 10 yellow/black 11 brown/black 12 black/red conductor color 13. Seems easy enough to remember. Phase b circuits are always red wire.
Web conductors by colours and. Indicate a hot wire, one that carries electricity. Or something else, black is the trivial color.
Black can be another phase, or a switched live. Phase a is circuit 1 and 2. Web answer (1 of 5):
It is located at the circuit end. Red and zero represent phase. Web black red blue circuit numbers web blue will be neutral.
