Wiriing A 3 Way Switch

Am doing a bathroom reno and installed a new fan. Original switch was a simple on off single pole. I want to install a DewPoint condensation fan switch that will turn on automatically at a certain moisture level.

The new switch as 4 wires. green ground, red fan, black power, and white neutral. I know the ground, but how do I hook up the neutral and fan to the existing fan set up?

There is a double pole light switch in the same box that has a couple wires to it, and there is a mass of whites that I am not sure where they go



Can I hook up the neutral somewhere else, or put it with the fan like a single pole? What do I do with this?



In the attached picture the switch on the right is the 2 pole light switch and on the left is the fan switch that I hope to replace.



Your Advice is appreciated
      

Hello again Gurus,



Will a double pole 15A 277v light switch work as a shut off for my air handler? I had to run all the electrical prior to them installing the central air and I wired a double pole switch from my 15A double pole breaker. I ran to the line/load ie black/white to the bottom posts on the switch. Thinking they can just run black/white from the air handler to the top. When the switch is UP> Live power to air handler. If it it's down (OFF), it means they can service the unit. Is my thinking correct on this? I couldn't find any other switches.



Thank You



~S
      

Hello I need seriouse help! In my situation I have a three switch, one for the light, one for the vent fan, and one for the heater. This is in a bathroom rent house. My problem is that when I turn the switch on for the light, the light and fan turn on, when I switch the heater on, that switch does nothing, the same when I switch the fan on. The wall plate is labeled: light, fan, heater. So what I attempted to do is put a switch outlet combo in. I have two black wires, two white wires and a ground. So I put the black wires on brass and the white wires on black,( they are black screws instead of silver, not sure if I got the right kind of switch). So when I did that, when I turn the switch on, the fan turns on, but no light, also when the switch is on the outlet is hot.( which fine that is how I want it). But what did I do wrong, why does fan work but not the light. I my biggest fear is that I might have made a fire hazard. Please help and tell me if what have done is safe, and maybe help me figure out how to turn the fan and light on with the same switch..  Thank you for all your input, have trouble falling asleep, keep thinking the house might burn down.. Sorry for the long post
      

Im replacing what I thought was 2 single pole light switches but there is 3 black wires and one red. I hooked them up to the new switches but both switches worked the one light can anyone tell me how to connect the wiring?
      

hello

I am dealing with what seems like a strange issue with a single pole switch, and I am royally baffled even after reaching out to someone a little more knowledgeable than me.



Yesterday: Replaced with a single pole switch with an identical one that I painted (for decor reasons). Two wires were going into the old, and the same 2 wires are attached to the new one. However, the light it controls fails to come on despite light bulb being good, and outlet located 4 feet below the switch fails to operate. With voltmeter in hand I tested voltages.

At the switch: 3 wires feed into it, all whites capped together, and 2 of the 3 blacks (A,B,C) are hot with 110. A is hot and was/is connected to one of the terminals of the single pole switch. B and C (hot) are capped together with a jumper that goes to the other terminal of the single pole switch. So I am royally baffled as to why a switch would be wired with 2 hot wires going into it. I swear it has been like that since we bought the house a year ago, and the light worked fine. I simply replaced the switch with the same wiring, and now it doesnt work. I even touched both hots (A and C) independently to wire B which (using common sense) should be the load wire to the lamp, but the lamp did not come one.



Other outlets in that circuit do not work either. They get 110 to line and ground, but not across the outlet.



I hope I was clear in explaining, and I hope someone can possibly shed some light so I can resolve this.



Thank you
      

Scratching my head on this. New pole building. For now, I want to use one circuit for the lights. What I'm trying to do, is, at one door, I have a 3 way, switching two flourescent lights. Also in that 4-gang light switch, is run a light over the door on the outside, and a light over the overhead service door, and another light over the door, on the inside. So 1 3way, and three single pole switches. At the back door, the other 3 way for the same two lights, and a light over the door on the outside, and another light over the door on the inside. I have the power from the m/p, going into the light box nearest the M/P. Long story short, instead of how I have it, which operates all the lights, as long as one of the three ways are on. If someone could help me with how it should be. I am using 12-3 from the switches. Using 12-2 from the first light box, to the second. I have a another 12-2 running into each switch box, to supply power for the single pole switches.

Thanks for any/all input.
      

I am only using a simple "non-contact" voltage detector. I am getting a reading from the switch, along part of the line and then at the lights themselves, but the lights are not coming on. I have not gotten into the attic yet to check the line and junction box. What could cause this? An open connection or loose connection? Any help with troubleshooting would be great.



This is a new install of lights, they were not existing. Power is at the switch. Had single pole now I have a double switch. (the existing light that was on the single pole is still working fine). At one  point I connected just the new lights to the existing power, single pole switch, and still did not have lights.
      

I have an outdoor light fixture that I am trying to replace.  The house was built ten years ago.



When I removed the original lamp, I noticed one of the two leads was wired to the ground, and one was wired to the black wire, which is hot per my current sensor.  There are three wires in the box - black, ground (bare copper), and white or neutral, all from a single romex cable.  Unfortunately, I do not recall where the white was when I removed the original. 



I wired the new lamp per the instructions, something I have done many times before - black to black, white to white, and bare copper ground to ground.  Nothing.  The lamp and bulbs are brand new, and I have tried four separate bulbs.  I checked the black and neutral with my current sensor and with the switch on and the lamp installed this way, both show as hot. With the lamp not installed, the switch on, and the wires disconnected only the black shows as hot.  The switch is single pole, and appears to be wired correctly with a black to each screw on one side and a copper ground on the other.



Assuming the new fixture was bad, I reinstalled the old fixture correctly -  black to black, white to white, and bare copper ground to ground.  Still nothing. No light, and I confirmed the bulb is good by putting it in another lamp.   The only way to get it to light is to connect the neutral in the lamp to the bare copper ground.



I capped the wires, turned the circuit back on, and identified all the outlets, switches and fixtures on the same circuit.  I opened every one of them up (four lights and eight outlets) and found three (one switch and two fixtures in another room) where multiple commons connect.  All were properly connected.  My outlet tester shows all outlets as "correct".  I found no instances of grounds connected to commons or vice-versa.



Any ideas?  Is it proper to wire this thing the way I found it?



Thanks for any and all advice!
      

I am trying to install a SunSmart Digital Timer to my hall lightswitch (single pole). The timer has 5 wires: Black, White, Blue, Red, and Green. My switch box only has 3 wires: Black, White, and the bare ground wire. I connected the black to the black, white to white, and green to the bare ground. I have power to the timer but the light doesn't work. What should I do with the blue and red wires? Right now I have each capped off. Thanks.
      

Hello!



In a house I recently bought I have a strange situation.



There is a three way switch on one side of the wall with two sets of wires coming in:



Red, Black, White

Black, White



and then one stray Black that goes to the duplex receptacle on the other side of the wall (on the OUTSIDE of the wall!  Clearly an afterthought.)



Into the receptacle goes this strange black single wire from the light switch and the usual black and white wires + ground wire.



I went to change the ugly receptacle to a decora and now it doesn't work, though I'm not 100% sure it worked before.



I've wired the new receptacle as I remember it being wired before, any idea what is wrong? 



I've attached a diagram!



Thanks in advance for any input.