Well cover the easier scenario first. They should both be of the same wire gauge.
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Color Coding Electrical Wires And Terminal Screws
Light switch two black one red. 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. Dont get confused about using the red wire from the multimeter to test a hot black wire. When you see a red wire in a light switch box it can mean two things. Place the prong of the multimeters red wire on the bare metal on the end of one of the black wires. There are two black wires attached to one brass screw and a red wire attached to the other brass screw. Thinking about it it may have been 2 blacks and 1 red but either way there are only the two colours.
It could be there is or once was a three way switch in play. After some help if possible. First twist the two bare copper ground wires together. 12 awg for 20 amp circuits and 14 awg for 10 and 15 amp circuits. 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. You will have to get a 4 way switch for that position not a 3 way switch.
At the light fixture there is one bundle of wires coming from switch one and one bundle coming from switch two. I have an old 2 way 1 gang light switch to replace but the one currently fitted has 2 red wires 1 black wire as opposed to the three different wires as shown on most sites that i checked out. 4 way switches have 4 screws 2 will be black and 2 will be brass. The positive wire on a multimeter is red and the black wire is negative. Take the white wire from switch two and twist it with the black wire from switch one. Twist the two red wires together and attach a wire nut.
This is an older house circa 1967 and the wiring appears to be all over the place. Or it could be the red wire is the wire going to the fixture and the black wires are the live wires. I have a light switch with two black wires one red and a ground answered by a verified electrician we use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. There appear to be two white assume neutral wires screwed together with a wire nut and a ground wire tucked away inside the junction box.
Gallery of Light Switch Two Black One Red
