Make sure to shut off the power before doing this turn the breaker for the circuit off. Black means hot white signifies neutral and green indicates ground.
Switch Box 2 Black 2 White 1 Red Electrical Diy
Light switch has 2 black wires. The easiest and safest way is to use a multimeter to test for current. I turn power on turn switch on no light. If you have a ground wire connect the ground wire to the green screw. Connect the lead wires from the fixture to the black hot wire in the electrical box by twisting a wire connector to the ends of the lead and hot wires. 4 way switches have 4 screws 2 will be black and 2 will be brass. Bulb1 and bulb2 white and black wires connected to breaker white and black wires.
If the switch that was there is a standard light switch with two brass screws on it and one green screw you can connect the red wire to either of the brass screws. Its essential that you determine which black wire is hot before proceeding. I have tested continuity on the switch and its wires. When you turn the power back on and if you want to swap the direction of the switch as in press down to turn off or turn on turn off the power and switch the two black wires. Also the light fixture is. Repeat these connections with the two white.
Connect the black wire to the other brass screw. However if you need to rewire a light switch or a plug socket you may occasionally come across two black wires. Copper wire connected to junction. Connect the top screw to the wire that feeds to the light. Turn on power lights come on but switch has no control. Red and black form the same cable will connect ot he brass screws then the red and black from the other cable will connect ot he black screws.
Connect the bottom screw to the hot wire. You will have to get a 4 way switch for that position not a 3 way switch. There is no problem with the switch.
Gallery of Light Switch Has 2 Black Wires
