This is a typical wiring setup for a 3 way light switch with black white red and ground wires. If you have a ground wire connect the ground wire to the green screw.
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Light switch with only one black wire. With only 1 black and 1 white they are both black as far as hooking up wemo. I have 4 installed like this. Wemo black wire to the white wire from old switch. So usually a standard single pole dumb switch has two blacks. The hot wire from the breaker usually black neutral. Smart switches use a neutral and a ground wire in addition to the line and load black wires.
For the ground on the wemo just cap. The wire that will be hot when the circuit is completed to your light usually black traveler. When there is just one white wire and just one black wire altogether both are to be treated as hot. After some help if possible. One is the power coming into the box the other black is power going to the light. Run 2nd wemo black wire to black wire from old switch.
Thinking about it it may have been 2 blacks and 1 red but either way there are only the two colours. If you dont have a ground wire leave the green screw unconnected. I would check that the load wire probably black is securely connected to the screw labeled load. To be absolutely correct the white wire in this situation should be the wire that is always hot and the black wire goes to the light and is made hot when the light is turned on using the switch you are installing this very moment but once in awhile you find the wires reversed. A single pole single throw switch such as a light switch. 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.
Ive decided to put this faq together to help those with questions about installing ge 3 way switches. 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. Run white wemo to this common wire you add. Wiring a three way switch. You have to have a common and i did was run a single wire from a box that uses a common wire. In existing 3 way wiring this wire toggles hot between two.
The return wire for circuits usually white load. My old light switch in my bathroom only has two black wires connected to it. Connect the black wire to the other brass screw. The hot wire in a 120 volt residential ac circuit usually is coated with black insulation while the return or neutral wire is white.
Gallery of Light Switch With Only One Black Wire
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