Test the wires to verify that no power exists using a voltage tester. The old switch had four wires going into l1 l2 l3 and l4.
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Wiring a light switch with 3 wires. If you have a 2 gang or 3 gang switch you may have black and grey wires however these will have a brown sleeve on them as they are also switched live wires. Turn off the circuit breaker at the main panel that supplies power to the three wire cable intended for the. Once your loops are created attach one of the loops to the contact point on your light switch. Place one probe of the tester on the. A 3 wire cable has an extra wire when compared to 2 wire cables and this wire is nearly always covered in red insulation. Im moving a light switch to a different wall and have found that the cable from the switch to the light has 3 wires but i dont know why.
This 3 way light switch wiring diagram shows how to do the light switch wiring and the light when the power is coming to the light fixture. The 2 wire source feeds to an adjacent switch for a differ. Twist the end 180 degrees forming a nice neat loop. The black hot wire connects to the far right switchs common terminal. Re wiring 3 way light switch hi guyscould really do with some advice for replacing a 3 way single light switch. Repeat with the other black wire.
Leave 810 inches 203254 cm of wire inside each of the boxes before cutting the cable to facilitate easy splicing and connection to the switch and fixture. How to attach a two wire lighting fixture to a three wire supply step 1. This third wire is necessary for 3 way switch installations. Hook the loop around the contact point and tighten the screw in a clockwise manner. In this diagram power enters the fixture box. Red and blue wires link traveler terminals of both switches.
The 3 wire system is less common than the 2 wire system it includes a neutral at the switch as well as the live and switched live wires.
Gallery of Wiring A Light Switch With 3 Wires
