Distribution and use of electricity throughout the home. Electrical standards vary greatly worldwide, so providing your location in your question or your profile helps ensure you get answers that are relevant to you. Posting photographs of wiring junctions or drawing a wiring diagram and posting ...

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1answer
3k views

How can I install this programmable switch?

I just had our house re-wired (by a professional, not myself). I'm looking into replacing a light switch with a fancy programmable version (Honeywell Econoswitch RPLS740B). The location for the ...
3
votes
2answers
382 views

splitting a water heater bill

Can a water heater be installed between two apartments and wired to both apartments' breaker boxes, effectively splitting the bill between the two? It's a 220-volt heater, and this is a retrofit ...
3
votes
2answers
1k views

30 amp dryer plug is hooked to a 40 amp double breaker, is this ok?

I just bought a home and needed to buy a new washer and dryer. The new dryers need a 30 amp plug, currently has 50 amp plug. I replaced the plug but noticed it was ran to a double pull 40 breaker, is ...
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2answers
577 views

Common kitchen/bathroom countertop devices that use 120V20A

I currently have a 110V20A GFCI outlet in my guest bathroom. It's the older type, with red and black buttons, and I'm planning to replace it with a new TR/WR GFCI receptacle as part of a general ...
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2answers
5k views

How can I hang a ceiling fan on a cathedral ceiling without wiring or an electrial box?

How do I install a ceiling fan on a cathedral ceiling that has no wiring and electrical box? I don't really want to cut into ceiling drywall. I'm worried about support for the fan.
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5answers
156 views

Need another 240v breaker

I bought a device called Sense to monitor home electrical usage that is installed in your electrical panel. The device needs to be connected to a 240v breaker like this: The problem is that I only ...
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2answers
347 views

How can I figure out why this electrical receptacle is dead?

One of the rooms in my house has a 20A circuit. I plugged an 11A device to one of the receptacles in that room for the entire day. Walked away, came back and that device was powered down. I connected ...
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2answers
509 views

What is a multiwire branch circuit?

What is a multiwire branch circuit? (also known as "multiwire circuit", "multiwire branch circuit", "split phase shared neutral", "two circuits fed from one 12-3 or 14-3 NM-B cable", "shared neutral ...
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1answer
491 views

NEC, use more extension boxes or an access panel?

What is the maximum number of extension boxes you can hang from a ceiling? This is ridiculous and I probably need one or two more to meet the new drywall ceiling. Are junction boxes permitted behind ...
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1answer
2k views

How to wire a 240V disconnect panel for spa that does not require neutral?

I'm wiring a 240V/60A hot tub which requires 3 conductors; one of these conductors is ground. No neutral is run to the tub. That said, I have a red, black, and green running to the hot tub from the ...
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1answer
2k views

Can a built-in dishwasher be plugged into a receptacle?

We just bought a house in California. Can a built in dishwasher be plugged into an outlet or must it be hard wired?
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1answer
13k views

Are there locations in a residence where a non tamper resistant receptacle can still be used?

Assume for a second that my jurisdiction has adopted 2011 NEC code as legally binding without significant amendment. This code requires (406.11) that 120V 15/20A outlets in all areas defined in NEC ...
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2answers
3k views

Can I put acoustical putty *inside* the electrical box rather than around the outside?

For soundproofing applications, they make acoustical putty that you put around the electrical box. However, what if you can't get behind the electrical box? In my case, I have a wall floating on hat ...
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votes
2answers
16k views

What could cause a circuit breaker to trip when an exhaust fan is turned off?

In my bathroom, I have a switch for the light and a switch for the exhaust fan. It seems that on occasion, not all the time, the power will trip when I turn the fan off, not on. It also seems to be ...
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votes
3answers
216 views

Doorbell low voltage converter sharing breaker

Can a doorbell low voltage converter share another circuit's breaker by both wires plugging into it? Or should a single wire go into the breaker but split it inside the panel using a wire but? Or does ...
3
votes
2answers
4k views

How do I install a receptacle in the soffit?

I'd like to add a receptacle (for x-mas decorations etc) in the soffit of my house. I'd prefer flush-mounted so it's the least visible possible. It will be wired to a switch (timer) inside the house; ...
3
votes
3answers
562 views

What type of electrical box do I use for a hard-wired smoke detector?

I am considering adding hard-wired smoke detectors to my house. Due to other in-process remodeling projects and the structure of the house, I have access to get behind the drywall at each location ...
3
votes
1answer
9k views

How to add GFCI to a box with one outlet controlled by a switch?

I'm pretty inexperienced when it comes to electrical work, though I do know my way around a circuit diagram, thanks to some EE courses in college. I think this is one I can do myself, I just would ...
3
votes
1answer
2k views

Should a generator transfer switch have continuity between all contacts in the “Gen” position?

I am finishing up installing my generator transfer switch today and I think I have a wiring problem... I have a six circuit transfer switch wired in with a power inlet box outside. Everything is ...
3
votes
1answer
14k views

How should I connect electrical wires to a cooktop (platetop)?

I'm having some problems understanding how to connect some electric wires for a platetop. The wire colors normally mean, blue=N, brown=L, and yellow/green=PE. My problem is, the platetop has L1 ...
3
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2answers
2k views

Can I connect a combination heater/fan unit to the existing bathroom wiring?

I have a dedicated 15A circuit for a top-floor bathroom fan with heat lamps which draws much less than capacity. There is nothing else on this circuit. I know that code for a 15A 14ga circuit at 80% ...
3
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2answers
181 views

why is a service neutral grounded but not the subpanel-neutral?

I know it's code (refer to NEC 250.24(A)5 and 250.32), but I don't understand why you can't use a bonding jumper to connect the ground bus and neutral bus in the subpanel? I've been told it's because ...
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2answers
2k views

Why does my ceiling lights require some other outlet in the room to be turned on and off again before it works?

Picture the scene: I walk into a room and flick the light switch. Nothing happens. I grobble around in the dark to where a baby bottle warmer is plugged into a normal outlet and turn the warmer on. ...
3
votes
1answer
3k views

How do I replace a single pole light switch with a programmable timer switch?

We have a light switch box containing three single pole switches (no ground terminal) in the foyer near the front door. I would like to replace the light switch controlling the porch lights with the ...
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2answers
7k views

How do I install a bathroom fan with its own switch?

There is an existing light fixture and switch for the light fixture. I want to add a bath fan with its own switch. What is the easiest way?
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3answers
2k views

Why does my dusk to dawn light go off when the furnace kicks in?

My dusk to dawn light goes off whenever my furnace kicks in throughout the night. It obviously comes back on right away, but it takes a minute or so to be fully restored. What is the reason behind ...
2
votes
2answers
477 views

How should I connect a grounding wire from a device to this box?

I'm replacing this simple 2-connector light switch with a 4-wire dimmer. The 2 new wires present on the dimmer are neutral and ground, and only neutral has an obvious home. The box has no visible ...
2
votes
1answer
41 views

Can I change an outlet circuit to 240V (NEMA 6)?

I'm in an American house sitting in a jurisdiction that applies NEC 2014 unaltered. I've got a home office room with all the outlets on one 20A circuit. It is legal to 2014 code in all respects. Who ...
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votes
2answers
95 views

Wiring in a bath heater,vent, fan combo with power source coming from ceiling

I have 3 cables coming in from the ceiling, with one being the supply. At the switch box I have 2 cables with neither being hot. In the switch box I have a black/white and another set being black/...
2
votes
1answer
129 views

How do I make two wall switches work in coordination, wirelessly?

I remodeled my kitchen and added under cabinet lighting. The under the cabinet lights are controlled by a wall switch on one side of the kitchen. The overhead recessed can lights have a switch on ...
2
votes
1answer
549 views

Can I upgrade my garage to 20amp service without a headache?

I have an unfinished garage which I am looking to upgrade the service to. Currently it is 15amps running through some difficult to access sub-ground conduit, but if I run the band saw plus the ...
2
votes
1answer
565 views

Adding new lights to a switch

I have a single light controlled by a switch in my garage. It's really pathetic, so I decided to add some shop lights to the same switch. Upon opening up the light wiring box, I found not 1 but 4 ...
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2answers
2k views

NEC Definition of “Maintained Spacing” for Wire in Free Air

This seems like a simple question, but I cannot seem to find the answer in the 2008 NEC. There are references to "maintaining spacing" in many sections of the code such as the following: 310.15.B....
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1answer
905 views

Installing Coax & Cat6 in 2-Gang with Electrical?

Using a 2-gang box, can I install a (1) outlet, (2) coax, and (3) Cat-6 line without code or interference issues? I have an existing 1-gang box with electrical that I am running the coax and cat-6 ...
2
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1answer
1k views

How do I install electrical through “new work” stucco?

See also How do I install electrical through stucco which deals with the old work situation. What are the best practice products and procedures for installing an exterior light, on a wall that will ...
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2answers
10k views

Is it okay to staple romex to a floor joist when running it perpendicular behind a finished basement ceiling?

Taking down my ceiling to run some wire to new outlets. The outlets are going in an area with an unfinished ceiling, so I know the romex there will need to be ran through the joists when going ...
2
votes
1answer
292 views

Installing an outdoor inlet for a portable generator

I've purchased a portable generator that I'm planning to use in case of an outage. I'm not wanting to wire this to my house wiring; I'm just planning to install an outdoor inlet wired to a dedicated ...
2
votes
1answer
5k views

Is it possible to do two 3way switched circuits that share a common power source but the power source and the light wire are in the same box?

I'm trying to connect two separate circuits from a single power source using 3way switches. My trouble seems that my wire from my light and my power source are in the same box. Is there a way to do ...
2
votes
5answers
4k views

Why are there multiple receptacles by amperage?

I could imagine the various receptacle shapes being a tool to protect you from making a mistake about what you plug in. Consider a 15A breaker with 14ga wiring to NEMA 5-15R receptacles. The circuit ...
2
votes
8answers
15k views

Is there a motion sensor light switch that does not need ground?

My house was built in early 1950's and all electrical switches do not have a ground. This was found out with an electrician when I asked them to install Lutron Maestro, but it would not power on since ...
2
votes
2answers
6k views

Do I need to ground my above ground pool / with saltwater system?

I just bought a 21'x52" above ground pool. I am going to use a saltwater system with it. Do I need to ground this pool ?
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2answers
438 views

Am I missing some obvious way to change this lightbulb?

I thought I'd be able to lift the plastic shade and angle it out of the trim, but it doesn't lift at all. It slides side-to-side a bit, but the flanges are large enough to keep it firmly behind the ...
2
votes
1answer
595 views

Replacing outdoor outlet

How can I replace an outdoor outlet cover that has a stripped center screw? Do I need to replace the outlet as well? Do I need to replace the box that the outlet is housed in if it is coming out ...
2
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1answer
134 views

What are the building regulations in the UK for fitting a light in a bathroom?

What designs of lights are allowed? When do I need to get a building regulation inspection?
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2answers
1k views

Is my CL dimmer compatible with my light switch fixture?

Bought a Lutron CL dimmer after googling around and seeing how easy it is to install a dimmer, but when I got home and took a look at my light switch I'm not sure its compatible? The dimmer has 4 ...
2
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2answers
2k views

How can I replace a recessed light with a ceiling fan?

I've installed a few ceiling fans before and found them to be pretty easy so I'm trying to add them to each room in my house, I don't have great knowledge of electrical work but I can install a ...
2
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1answer
1k views

What could cause two of my receptacles to stop working?

Problem: No power in two receptacles. Note: Both receptacles on same circuit. What I have done: Checked the 15 amps circuit breakers with a volt tester. Each breaker reads 125 volts. Bought a ...
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2answers
1k views

How can i set up a Solar Panel to charge a 12v DC car battery and power a Raspberry Pi?

I've pulled together a few spare parts that i've had laying about for ages now and I finally have a bit of time to try do something with them. I've got a solar panel which puts out ~22vDC @ ~2Amps ...
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5answers
1k views

TV Arcs with Cablebox through both Coax and HDMI

Here is our setup Outlet in older house that was replaced with a GFI last year. (no issues until recent) The GFI doesn't have a ground wire running up from the basement. Just the white and black ...
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1answer
1k views

Ground Wire Installation

Currently I do not have ground in my house wiring. I am planing to install ground wiring but the floor around the main service panel is cemented and I don't think I can place a ground rod in the floor....