Join the two black
SOURCE: Help - I am trying to install a honeywell RLV4300A
You will have to have schematics from the old wiring diagram. Then you will have to confirm its consistency with actual old wiring before you can be sure that the wires run to the proper places on the old heater and a/c system. This sounds like a gas furnace and is simpler than a heatpump. Once you know what distinguishes the wires with the same color, you should label them and then you may call them a different color if they were wired with wrong wire colors. You may be in luck if you go to the furnace control box an look at the terminals.. They are usually labeled with a R for Red and W for white and Bl for Blue and B or Black. If you have other colors on these then it sounds that it was wired with wire spare wire by someone who knew what they were doing but neglected to leave a path for someone else follow.
You may be able to use a continuity tester of circuit tester to id these wires that are in question...
ie, once indintified, you can match with the requirements of the new stat.
SOURCE: how do I install decora sureslide single pole dimmer switch??
Ok, first turn off power by finding the break box and switching to off. Then I'm assuming you mean by "socket" you mean the hole in electrical box mounted in or on your wall the dimmer is supposed to mount to. Sounds like your electrician ran the power back to the switch through your neutral/white wire. Your dimmer has a top and bottom, it also could possible have a tiny word imprinted that says "to light" and "+" if not attach the white from your socket to the top black wire on the dimmer, then connect bottom black wire to the socket's black wire...ground wires should connect to each other and to the ground in the wall socket. Use wire nuts to secure, then check to make sure no wires are touching anything except for what they are supposed to me touching...and test it before you permanently attach. Go switch power back on, and try your dimmer...if it works GREAT:) Now go turn off power one more time, tape your wire nuttted connections with electrical tape, mount dimmer and go turn back on the power. Hope this helped! Thanks
SOURCE: I'm using a Leviton 1755 combo 3 switch for a bath
remove white switch one and connect to incoming white ground--all whites should be connected [hooked] together these are grounds-- switch 1 black from fan ,leave switch 2 red from fan ,switch 3 vanity black
SOURCE: I have a Leviton single
easy one first: ground wire to green screw. We have to assume the two black wires are the hot(coming from power source) and switch leg(going to light). Switch will have two brass colored screws. Looking at the switch with the off/on markings right side up. Put hot wire on upper screw and switch leg on other brass screw, With nothing hooked up, the hot wire will be the only wire with voltage on it. You can buy a non-contact voltage tester at Lowes or any place that sells electrical supplies. Now we must assume the two white wires are neutrals(one coming from power source and one going to light. The pilot light part of the switch will either have a silver colored screw or a white pigtail on it. all whites hook together. The pilot light is wired internally to the switch leg. Your switch should work properly now.
SOURCE: I have a light switch
You have 3 cables entering the box.
Each cable has black and white and ground wire.
You have a single pole switch.
The switch has 2 brass-colored screws and 1 green-colored screw.
1) One thing is certain: all the ground wires connect together and then connect to green screw on switch.
2) After that, we are guessing without more information.
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3) What does the switch control?
4) If the switch controls a hallway light, and there is another switch for the same light: then you have wrong switch. You need 3-way switch. Buy 3-way switch and re-post question at fixya.
5) If switch controls a bath fan-light combo, repost question at fixya.
6) If the switch controls a regular light, and no other switch is involved: then the following information might work. Or you need to do testing and re-post another question at fixya.
-White wires probably connect together and are covered with a wire nut.
-Then two black wires connect to one brass screw and 1 black wire connects to other brass screw.
-But which black wire?
-Only one of the black wires has power from circuit breaker. That is hot wire.
-Hot wire connects to 1st brass screw on switch. Either screw.
-And then connect one of the other black wires to 2nd brass screw. Turn on power and see if light turns on.
-Try other black wire same way.
-The black wire(s) that turn on lights on should be left connected to 2nd brass screw.
-If one black wire did not turn on lights, then that wire probably connects to 1st brass screw along with hot wire.
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