Key to wiring diagrams
 | Black wires (HOT) |
 | White wires (NEUTRAL) |
 | Red wires (TRAVELLER or SWITCH) |
 | Green wires (GROUND) |
 | For ease of illustration, white wires marked with a black circle are HOT not NEUTRAL. In real life these wires would normally be marked with black tape |
 | 2 wire cable with ground - the ground is shown as green for illustration but is actually a bare copper wire |
 | 3 wire cable with ground - the ground is shown as green for illustration but is actually a bare copper wire |
 | Switch box - used to mount 2, 3 and 4 way switches |
 | Octagon box - used to mount light fixtures |
 | Light fixture - showing lamp, hot and neutral terminals |
 | Two way switch >>MORE INFO |
 | Three way switch - used to control a light from two locations >>MORE INFO |
 | Four way or crossover switch - used, in conjunction with three way switches, to control a light from three or more locations>> MORE INFO |
Tags: how to wire a light switch, wiring diagram key