Questions tagged [electrical]

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 it is also highly recommended.

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58 views

What size wire for a 100 amp sub panel in a barn?

I am installing a 100 A sub panel in my barn which is 170 feet from the main panel. 100 feet will be underground and 70 feet will be through the crawlspace underneath the house. My main panel is 200 A....
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66 views

240v 4-wire power issue

To start, i repair hot tubs for a living and am not a licensed electrician. But I recently am having a problem with a job that I know I have had many years ago but I just can't remember what solution ...
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4answers
61 views

Rewire attic fan from switched to always-on

I have an attic fan wired to a thermostat that I'd like to come on whenever it's hot enough. The problem is, the fan is wired to a circuit that's operated by the light switch for the stairs into the ...
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62 views

Remove Light Switch - Bury or Move?

I have an interesting concern. I bought a house built in 1978, and since then the previous owners made some changes. One of which I can't figure out how to do safely and up to code. And I have read ...
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1answer
46 views

200 Amp exterior meter and disconnect with interior main panel

Can I have an exterior 200A meter and disconnect with the 200A main panel in the interior some 20-30 ft. away? It has to meet California residential code. I'm trying to avoid the cost of an exterior ...
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2answers
100 views

How can I fix my garage's existing wiring

My non-attached garage is currently fed with a 10-2 w/ground wire from my main service panel via a single pole breaker buried in conduit. When the wire enters the garage it enters a junction box were ...
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2answers
92 views

Can I use a tandem 20A breaker for two kitchen circuits?

I am in the process of renovating the kitchen in my 100+ year old home, including cleaning up the electrical “situation” the previously owner attempted and bringing up to code. NEC requires that ...
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1answer
58 views

Bathroom and hallway lights keep turning off

I wonder if any one can give me some advice. We have been having problems with our bathroom and hallway lights. If hall way light is on and you then turn on bathroom light to go in bathroom. Bathroom ...
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0answers
45 views

Does cabling between a mini-split indoor and outdoor unit need conduit?

I am installing a mini-split AC system where there are multiple indoor units connected to a single outdoor unit. For each indoor unit, there is a separate 4-conductor cable that connects to the ...
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1answer
43 views

Furnace's contacts getting dirty

The two copper wires inside our furnace, that are supposed to ignite the gas, get too dirty to do the job about twice a year... We then have to go there -- always at inopportune times -- remove two ...
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3answers
98 views

Can you attach more than one wire in a given hole on a bus in an electrical panel?

Is it permissible to attach more than one neutral or ground wire to any terminal screw on the service panel bus? A home inspector says this is not allowed. THAT DOESN'T SEEM RIGHT, because all of ...
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4answers
2k views

Why are 120 V general receptacle circuits limited to 20 A?

The NFPA-70 (National Electrical Code) prohibits the use of breakers larger than 20 A for general receptacles. But I have my doubts. A 20 A breaker on a 120 V circuit with appropriately sized wires ...
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2answers
37 views

Unable to remove light fixture because of a wire entry holder

Hello, I'm trying to remove a florescent light fixture but a plastic yellow wire entry holder is preventing the fixture from coming off. (See photo) It looks like a holder that had been crimped with ...
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2answers
50 views

Add switches for two new lights to an existing switch box

My question is a bit complex. I'll try to be short and to the point as best I can. I am trying to add two more light switches to make a total of three at a light switch. The first one that was there ...
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2answers
297 views

Conduit Fill and Derating for THHN Cables (outdoor run)

Project: Run a 15Amp and a 20Amp circuit to bathroom from breaker panel outside the house. After much reading, I have determined that NEC requires adherence to the following. Any suggestions for ...
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44 views

How to test an “electrified” appliance

I have an old appliance (Hobart mixer) that recently started to give me electrical shocks when I touch it. I didn't see any obvious signs of broken wiring, but I will probably replace it, as it's ...
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89 views

31 volts on wall outlet circuit

I have a circuit on a 15 amp breaker. It was working fine yesterday and then suddenly everything stopped working. The breaker was not tripped. My non contact voltage detector goes crazy as soon as it ...
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3answers
51 views

Troubleshooting GFCI Outlet Tripping

Recently, the GFCI outlet that "powers" our back patio has started tripping. Initially, I thought the outlet was old since this only started recently (and we use our patio regularly), so I replaced it ...
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1answer
83 views

Circuit Not on Any Breaker, but Off with Main Breaker

Looking through my main panel today I discovered that at least 1 circuit does not appear to be attacked to any breaker. If I turn off the main breaker of the house, the circuit does turn off. How can ...
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4answers
90 views

Replacing receptacles - why are white and black wires crossed?

I am in the process of replacing all receptacles and wall plates in my home. Most of the receptacles are pretty straight forward to replace as they have only one black and one white wire (and ground). ...
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1answer
69 views

Do I have this diagramed out right?

Wire diagram: Looking for either confirmation or help of its wrong. The above diagram shows what I’m planning on doing. There’s an existing light switch in my basement that operates the top outlet ...
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2answers
274 views

What kind of wire should I use to pigtail an outlet?

I want to turn my 2 hot and 2 neutral wires into a pigtail for my outlet. Since I don't have any extra wire or black wires, what kind should I purchase? The wires in my receptacle are copper.
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19 views

Auto electrical-LED still glowing-07 Jeep Liberty [migrated]

Ok so a little background, I had put the blue led 578 sylvanias only one, in the rear dome. It never illuminated when the car was off, then I get blue led light strips for the front doors. I wired 2 ...
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1answer
60 views

not sure how to wire a troffer

The troffer I bought comes with a disconnect, two black, two white. I had no problem wiring in two of them but the third one is difficult. The light bulb that was in there before had its black wire ...
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2answers
57 views

doubling / paralleling in home electric

I have a 40 amp circuit. Can I use 2x10AWG wire for each conductor instead of 1x8AWG?
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1answer
81 views

How to move a junction box?

Hi i want to move a junction box that's behind my back splash into a cabinet but so i should be able to access it as needed according to the code but the wires from the top and bottom are exact so i ...
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3answers
94 views

My house breaker box have only breakers which seat only 1 wire. No seat for a load neutral. Can I still install a GFCI Breaker?

My house breaker box have only breakers which seat only 1 wire. No seat for a load neutral. Literally one screw on the breaker. There are neutrals on the bar and everything works no problem. I want ...
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3answers
69 views

Device to switch between two light with a single wall switch

first of all, sorry about to be asking that silly and newby question, I know, it is really lame. Is there a simple device, that I can build simply, or bought, that can switch between two lights ? I ...
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4answers
264 views

using solar when power grid down, why do I need batteries?

I am considering a home solar photovoltaic installation, probably 5kw or so. The usual configuration around here is with a grid-connected inverter and net metering. But when the grid goes down, the ...
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0answers
40 views

Three-way light trips new AFCI breaker

I recently replaced my home's load center. As part of that surgery, my breakers were also updated to (combination) AFCI breakers. My house has many Multi-wire branch circuits, so I also got a couple ...
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1answer
42 views

Adding pool heater to bonding of pump, salt generator, and timer

I just recently installed a heater and on the bonding lug my installer ran a green wire back inside the heater to the metal. I could have sworn that they were supposed to run a wire from the bonding ...
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1answer
63 views

very confused on the wiring for recessed lighting

Trying to retrofit LED can lights by bypassing the ballast. First light I retrofitted had 1 white, 1 black, and one green ground wire in the junction box, along with 2 red and 2 blue leading to the ...
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1answer
49 views

Do dimmers and timers not have Amp spec?

I have noticed that single pole switches are spec'ed for either 15 or 20 Amp. However, I could not find this rating for dimmer and fan timer switches. They only list voltage. Is this because they ...
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2answers
83 views

Voltage/current stabilizing

I am running a wire 300+ feet. I'll need to place a transformer every 100 feet that would maintain voltage/current, therefore I wouldn't get any drop so that I can maintain 110vac 20 amp. Which ...
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4answers
6k views

Loss of power when I remove item from the outlet

I have this unusual electrical issue in our master bedroom. I was wondering if anyone else has experienced this. We have this $3 LED night light in our bedroom and when we take it out, the power/...
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4answers
4k views

Confusion over 220 and 230 volt outlets

We have a 220 outlet for our A/C. We are shopping for a new unit and all I am see is 230 volts on the units. Will we have to rewire with a new outlet for a new A/C?
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1answer
53 views

Home electric circuit goes dead without tripping breaker

I have a 15 amp circuit in my home with 8 outlets. Every couple of months it mysteriously stops working, however, the breaker doesn’t trip. After a couple days I re-apply the breaker and all is good....
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2answers
352 views

Can I change normal plug to a 15amp round pin plug?

I've got some festoons for a theatre show but the theatre is quite old and I was told they need to have 15amp round pin plugs. Can I just get some ordinary festoons and swap the plug into a 15amp ...
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2answers
72 views

Internet random disconnects when fan switch is turned on/off

Hi Saviors on the internet, Recently, I have been having this issue within my apartment is that when I turn on/off my fan there will be a power surge within my house and sometimes causes my internet ...
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46 views

I removed the rear panel of my oven and the cladding is burned

i have a similar issue with my oven, I just replaced the fan element and also discovered black burn/scorched areas on the insulation cladding. Is this a worry or normal? Oven is about 15 years old.
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4answers
2k views

Splitting bath wiring circuit

I am looking to run a new 15amp circuit to my bathroom and want to split it in attic so one sub-circuit goes to exhaust fan and another to lamp. First, does this circuit look correct? One logistical ...
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3answers
106 views

Can I plug a washing machine requiring a 15A breaker into a 20A outlet?

I am removing an old Asko washer that plugs into single outlet 20 amp box. The new Samsung washer requires "AC 120 V / 60 Hz / 15 AMP fuse or circuit breaker." Can I safely replace the 20 amp ...
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2answers
45 views

Extending or increasing volume of a quiet doorbell [closed]

I have an old analog doorbell - there is a button for my apartment outside, and two wires come to where the chime is. When someone presses the button, a solenoid pulls back a little metal thingy with ...
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2answers
98 views

Purchased 1980 home, exterior outlet not working

Story: purchased a home built in 1980. One of the exterior outlets was missing. As in, just exposed wiring (ground, white, black). I installed a new receptacle but it doesn't work. Theres an ...
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2answers
78 views

IBT and whole house transfer switch

The inter-system bonding termination (IBT) is where other services like telephone and cable TV get their ground bonds from the house's grounding electrode system (ground rods). 2014 NEC (NJ) 250.94 ...
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2answers
82 views

Wiring new lights with 2 sets of wires

I'm installing 3 light pendants above my island. They are connected to a single pole light switch. I installed 2 of the 3 and noticed the junction boxes for both have 2 black, 2 white, and 2 ground ...
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3answers
115 views

Can I add an additional outlet using an existing outlet that has no ground wire?

I am looking to add new receptacles (15A) behind my TV by running a 12/2 romex (20A circuit/breaker) from a nearby existing receptacles (15A). The problem is, the existing receptacle has no ground ...
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0answers
22 views

light and ceiling fan wiring diagram

i have a patio cover, i want to wiring 2 light and a fan with light (one light on each side of ceiling fan, so the fan will be in the center). i want two 3 ways switch to control all the lights, one ...
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3answers
74 views

What do I make of this wiring?

I am trying to replace a toilet pull cord switch. Wiring seems unusual in the sense that there are: 2x brown wires 1x brown wire that is live and by itself 1x yellow/green earth no blue wires ...
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32 views

URD Service entrance cable for tankless hot water heater

I'm planning on running 2-2-4 URD service cable to a tankless hot water heater. It's a long story, but I have to run from an outside load center underground and through the subfloor of a building ...