Adding New Circuit From Existing

Older house with the metal enclosed wiring has stumped me.  I am attempting to add a second switch for a fan off existing light switch in bathroom.  Existing wiring:  W,B,R from panel, W,B to light.  2 white wire are tied together, two black wires to one contact and red to other contact on switch.  Disconnected all wires and confirmed the black is live from panel.  It seems to me the light is seeing power the entire time since the blacks are connected? I'm confused, please help. how do I add another switch onto this circuit?  Thanks!
      

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 could use some help. I have an existing switch (power to switch) that is powering a light I plan on eliminating. I want to add two new lights to my garage and use the power from that switch for the lights. What is the best way to wire the lights from the switch? A diagram would be really helpful.



14/2 at the switch (black, bare copper, white).



Thanks
      

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 will be pulling from the breaker panel new 12/2 romex for a kitchen microwave and a 20 amp circuit, 12/2 for the garage. I might also pull some extra wire for a future add on room and to divide up existing circuits to avoid overloads in the future. I am snaking these cables through existing sheetrock ceilings and walls. Are there any code requirements about snaking through existing walls and ceilings other than drilling holes 2" from the face of a stud or beam?
      

I replaced an existing light switch with a switch/outlet combo.  The outlet works and switch operates light only, all appears to be working.



I plugged in a 660W device into the outlet and the light starts to flicker when the device is on, when the device is off, light stops flickering.



If I move the 660W device to an existing outlet in the same room, light does not flicker.



I don't think it should be a load issue but couldn't figure out why else the light flickers.
      

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 all, and thank you in advance for any help you can provide! Here is the deal I wanted to put a bathroom exhaust fan in and was told I could come off the existing switch to cut the wire, install a junction box, tie the wires all back in adding the wires for the fan. Trouble is the bathroom light stays on with the switch off. Turn the switch on light dims and the fan now runs, switch off fan shuts off light goes bright used black to black white to white where oh where did I go wrong!?
      

I have three romex coming into one arm of the recessed light. 1 from a  new recessed light, 1 from switch and 1 from not sure where. I connected  all the blacks/whites/grounds to the recessed light but the light  doesn't turn off when I flipped the circuit back on.



When I took the existing light out it had two romex going in but funny  (or not) thing was one of the reds wasn't hooked up, it was just sitting  there, no wire caps and not attached to anything. I tried it once with  the red in with the blacks and one without and neither would turn the  light off.



The other romex that came from the switch didn't have a red. Light worked fine.



Please advise
      

I'm installing a new light in a closet with an in-line switch. Because of the build of my house, a mid-run receptacle is the only power source available without ripping open a bunch of wall and ceiling. I've got everything installed and tied into the receptacle with appropriate pig tails, but whenever I turn the power back on, the breaker for that circuit instantly flips. I've double-checked all the connections and wires, and they are connected to the appropriate terminals. Tied the pig tails into the terminals on the top socket of the receptacle.



Could this be the result of a faulty switch? The breaker trips whether the switch is in the off or on position, and there are no bulbs in the light fixture. I'm stumped. The receptacle in question is rarely used, and I've powered off everything else in the room to be on the safe side, but the breaker trips.