They should both be of the same wire gauge. First the house wiring is very old and there are only 4 wires in the switch box 2 black 2 white no bare ground wire.
How To Install A Motion Sensor Light Switch How Tos Diy
Light switch has 2 black and 2 white wires. 12 awg for 20 amp circuits and 14 awg for 10 and 15 amp circuits. Youll have two cables in the switch box a live one with a black and white wire and the one going to the outlet which has a red black and white wire. When i pulled out the existing switch i noticed i have 2 black wires and a white wire connected to the old switch. However if you need to rewire a light switch or a plug socket you may occasionally come across two black wires. Repeat these connections with the two white. Hooking up a switch is the essence of simplicity.
My apologies if this has been tackled before but im trying to replace an old light switch in my bathroom and the old one only had two black wires connected to it. 2 light brass and 1 dark brass named common. Everything ive read online talks about white wires or red or green wires. It doesnt matter if you use top or bottom duplex switch to turn on both the recessed downlight and the hunter lightfan fixture. Its essential that you determine which black wire is hot before proceeding. You connect the black wires in the electrical box to the switch terminals and the white wires to each other.
Scenario a currently uses only 1 of the 2 duplex switches to turn on both light fixtures. The old switch had 3 screws on it. I tried to figure out the path of power but i wasnt getting the readings i was expecting. 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. The ground is screwed into the box so i understand that. The easiest and safest way is to use a multimeter to test for current.
The switch also has a green terminal. Black means hot white signifies neutral and green indicates ground.
Gallery of Light Switch Has 2 Black And 2 White Wires
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