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.

learn more… | top users | synonyms (1)

1
vote
2answers
105 views

Source of periodic buzzing noise in the walls

Just moved in to a new place and I've noticed during the quiet of the night when trying to sleep that there is this periodic electrical sounding buzz, sort of like the hum of my subwoofer if I leave ...
2
votes
2answers
2k views

What voltage adapter do I need for a 5 meter 5050 LED strip?

I have a 5050 5 meter LED strip and it requires an AC/DC adapter to run the full strip. I was told that I needed a 2A adapter, but I went to electronic store to buy an end adapter and they said this ...
0
votes
0answers
21 views

High electric bills due to electric problem [duplicate]

We get a low voltage shock when you touch metal with wet hands. When the electrician was at our house he turned off the main that supplies power the house and went around the house with a voltage ...
1
vote
2answers
86 views

Are the old A-head terminals for connecting to knob and tube wiring still compliant?

I'm in the process of decommissioning the last active (hopefully) knob and tube circuit in my house (I'm in the U.S.). The problem is that about 90% of the lighting in the house is on this circuit, ...
1
vote
1answer
116 views

Electrical problem

In my house we get a low voltage shock when you touch metal with wet hands. We had a electrician in who told us it was a problem outside our house. He said it had to do with the transformer that fed ...
6
votes
1answer
16k views

Is there a length limit on grounding conductor to ground rod?

My service panel is over a concrete patio, it was improperly grounded in the crawlspace. I cannot drive a proper ground rod in the crawlspace so I would like to drive one into the earth on the side ...
0
votes
1answer
12 views

after power cut - fuses all on and no power? (to pool filter)

We had a power cut last night due to a thunderstrom and this morning our pool filter wouldn't turn on. I checked all fuses in the fuse box, and everything appears to be switched on. I have a ...
1
vote
1answer
27 views

Air conditioner works in an outlet but not a timer

I have a wall unit air conditioner that works fine when I plug it into any outlet or power strip. However, when I plug it into a timer or a thermostat timer, which is then plugged into an outlet, the ...
8
votes
3answers
580 views

What could be causing this electrical issue?

The problem occurs within one particular unit of an apartment complex. All other units are fine. The problem has gradually gotten worse. All electricity within the house will flicker on and off. It is ...
6
votes
2answers
13k views

Would there be a problem installing 20A switches on a 15A circuit?

I've installed 20A switches on 15A circuits before, namely on the circuit supplying my kitchen lights. It was primarily to take advantage of the side-clamp wiring available on these beefier switches ...
11
votes
1answer
887 views

Is this a fire hazard?

I was going to change a light switch and repair some wall damage. When I started opening up the wall above the switch, I saw the electrical wire clamped to the stud. I noticed black marks around it. ...
3
votes
1answer
48 views

Electrical appliances on one outlet

Firstly, this is in France so we're talking 220V power. I've got two new single/individual induction hobs. They're both 2100W at full blast. I'm replacing a double hob unit where one hob was 1900W ...
2
votes
2answers
263 views

Explain voltage readings on NEMA 10-30 socket

The clothes dryer in the garage is plugged into what appears to be a NEMA 10-30 socket (receptacle). Reading the voltages on the socket with a multimeter, the voltage between the two diagonal ...
0
votes
1answer
67 views

Is connecting a 5 A PLUG into a 10/20 A socket for electronics pose a problem

Most of my electronic appliances are 5 A based, this includes my Desktop PC, external hard-drives, Laptop and TV but the socket I have are 10A/20 A one. Could there be a problem connecting the 5 A ...
4
votes
4answers
2k views

Can re-closing a circuit-breaker be dangerous?

I have a circuit breaker that keeps tripping. When i try to reset (close) it, it immediately jumps back to the open position with a noise that sounds a little scary. I have now stopped trying to do ...
7
votes
6answers
45k views

Why energy saving bulb flashes when the switch is off?

I have a energy saving spiral light bulb in my kitchen. In exactly every 27 seconds, the first segment of the bulb faintly flashes when the switch is off. And not once, repeatedly every 27 seconds. ...
0
votes
1answer
20 views

Any issue connecting neutral and ground of bluetooth light switch to ground (or neutral)?

I'm installing a blue-tooth light switch that has live, bulb, neutral and ground. The light switch that's being replaced has 3 wires, black, white and exposed copper (I'm guessing that's neutral or ...
-1
votes
1answer
15 views

Camper 30 amp plug. Trying to make my own

I have a 10 Gage 600v cable with four aluminum conducters. How long can I make it for a 125v 30 amp camper plug? Also I'm having trouble with the male side of the plug if you had a picture of the ...
0
votes
0answers
15 views

Multile (Isolated?) Grounds for Electronics Test Equipment [on hold]

So I'm not really sure which forum (this or the Electrical Engineering Stack) was the more appropriate one on which to ask this question, so I figured since it had to do with possibly digging a hole ...
0
votes
1answer
44 views

Receptacle not working

I have a receptacle that notoriously trips a breaker. However this time the receptacle stopped working as in nothing plugged in will work but will work everywhere else, and it did not trip the ...
3
votes
3answers
30k views

How to properly ground a subpanel in detached building?

I Will be installing a subpanel in a detached garage. The subpanel will be 60 amp. The garage is about 30' from the main-panel in-house, and I will of course get an exact length before selecting the ...
0
votes
1answer
26 views

Is it safe to put a window a/c unit over kitchen sink window?

Pretty self explanatory. I have a small window unit that would fit right over my kitchen sink window. About 2.25' of clearance above the counter top. Just thinking being near a water source may be ...
1
vote
3answers
196 views

Is it safe to ground a portable generator using the house ground at the service panel?

I've bought a portable generator that I'll use when the power goes out. The instructions in the paperwork state that the generator needs to be grounded before use. Can I use the house ground at the ...
0
votes
0answers
20 views

Electric Stove Smooth Heating Elements - How Should They Be Wired?

I have a question. My oven has just 2 heating elements (the other side grills or griddles). Whoever wired it did so with only 3 contacts. One contact is hooked to 2 wires with each one going to a ...
0
votes
3answers
33 views

how can I fix a tripped breaker?

how do I fix a breaker that trips when the window ac is on? I have tried unplugging other appliances . The breaker box is an old one.
3
votes
2answers
319 views

Are LED's always necessary/desirable?

I don't need or find it aesthetically pleasing to have little green micro-energy leeches illuminating every outlet and switch in my home. are there any GFCI's/outlets/switches that are LED FREE for ...
0
votes
1answer
58 views

Dead circuits with breakers across from each other

I have 4 dead circuits which were intermittent off/on at first- now dead. The 20 amp dual tandem breakers are across from each other in the breaker box. The breakers/circuits above and below the ...
3
votes
2answers
80 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 ...
2
votes
0answers
40 views

How to connect two dimmers to control two sets of lights independently

I have just moved to Germany, and have a room with a double-gang system. The lower is a rotary dimmer which controls the lights in the kitchen, and the upper is a double rocker switch that simply ...
0
votes
0answers
37 views

Can NM cable be exposed in attic?

All the visible cables in my attic are old armored cables, thus protected from possible critters trying to chew them (I've had squirrels there before) and other forms of direct impact. As I'm doing ...
4
votes
1answer
135 views

Can light fixture be installed in attic hatch?

This is a rather unusual scenario but is it compliant with the NEC to have a light fixture installed in a door that moves, e.g. an attic hatch? I have a hatch to my attic in the middle of a closet ...
2
votes
3answers
67 views

How can I wire two switched outlets but power is connected at the first outlet?

I'm trying to connect a new switch and two new outlets (from switch) to an existing electric line. This new switch should turn the two new outlets on and off. However, I'd like to connect it as ...
11
votes
7answers
47k views

Should I put a dimmer switch on a ceiling fan?

I have a ceiling fan on our bedroom's vaulted ceiling. Since we don't want 7' pull-cords, the speed is stuck at full-tilt, which is no good. The fan has separate switches on the wall for lights and ...
0
votes
1answer
23 views

Are HVAC Transformers Interchangable (if their power ratings match)

I'm troubleshooting the blower not starting in a friend's HVAC system. We think the issue is either a) a blown transformer, or b) the relay that controls the blower has blown. The next step is to ...
1
vote
3answers
64 views

Can I buy or make an adapter to hook 2 generators together to run a 220 volt welder?

Can I buy or make an adapter to connect 2 generators together to get more amps for my 220 Arc Welder?
0
votes
2answers
39 views

Noisy exhaust fan starting itself

Our bathroom exhaust fan is located on our second floor bathroom. It's the original installed in 1986. Suddenly, it started to make an unbearably loud noise upon operation. So loud that the sound ...
1
vote
1answer
26 views

Accepted electrical raceway material to residential detached garage

When exiting a home with an electrical raceway to serve a detached garage, is PVC a generally accepted (code-worthy) raceway material to use? My feeders are carrying one 20A dedicated circuit. My plan ...
1
vote
1answer
28 views

Easiest/affordable way to monitor what's using power in your home?

My electric bill seems to be unusually high. I'm trying to figure out if there is an issue somewhere (faulty wiring, someone stealing power etc) or if one of my devices is a power hog. Does anyone ...
4
votes
2answers
34k views

Is it okay to have an ungrounded light fixture?

I recently moved into an older home (built in 1968) and have been replacing some of the older light fixtures. We pulled down one of the lights and found that there is a ground running into the box but ...
0
votes
0answers
18 views

Both A/C air handler and outside unit won't turn on

I went to turn on my A/C for the first time this year, and nothing happened. I checked power to both the air handler and outside unit...both at getting 220v going into the boards on each. I then ...
2
votes
2answers
72 views

Electricity passes through a bulb holder, even when the switch is off

In my home, electricity passes through a bulb holder even when the switch is off. I heard that happens due to 3-way switches. Could anybody tell me if it is okay or worth worrying? Update Let me ...
3
votes
2answers
71 views

What are the potential dangers of not removing the tabs on a split receptacle?

If I feed a duplex receptacle from two separate branch circuits, I'm supposed to remove the jumper tabs between the receptacles. But what would happen if I didn't remove the tabs?
0
votes
2answers
19 views

Grounding metal box joining two BX cables without ground

If I have a metal handy box used to join two legacy BX armored cables that don't have a ground wire, do I need to ground that box like I would with NM cable by connecting the box with the NM ground? ...
1
vote
1answer
28 views

New junction box, or pigtail within receptacle?

I need to add a wall receptacle in a bedroom. (There aren't enough outlets as is.) The bedroom is on the main floor of a 1-story house, with an unfinished attic and an unfinished basement. Walls are ...
0
votes
0answers
18 views

Electrical — Open Ground on One Tester, Correct on Two Other Testers

Very Simple: I have a multi-unit building that had two separate outlets in different rooms with open ground readings on an outlet tester. Grounded each separate outlet to a nearby junction box with ...
4
votes
2answers
13k views

What type of wire should I use to feed a 70 ampere subpanel?

Finishing a basement and I need to add a subpanel. Main panel is outside. Subpanel will be in the basement. 70 Amp breaker in the main to feed the subpanel. I was thinking THHN but would this mean ...
3
votes
4answers
3k views

Is a duplex outlet's max amperage rating for each socket or the whole unit?

If you have a duplex outlet thats rated for lets say 20 amps, is the whole unit rated for 20 amps, or is each socket rated for 20 amps? Edit: So if I had a circuit that had a 40A breaker on it, could ...
3
votes
1answer
33k views

How do I wire two lights with a switch?

How do you wire two ceiling lights on one switch? I have installed the switch, and the two lights, but only one light is working. It is the light that the power source enters. My setup is like ...
1
vote
1answer
42 views

Is there such a thing as a backless junction box/conduit fitting?

I have a battery enclosure for a small off-grid solar installation, and I want to run the battery cables out of the enclosure to the DC breakers and inverter. I'm looking for a backless junction box ...
1
vote
1answer
32 views

LED bulb with slow on motion detector

Can an LED bulb be used with a retarded on motion detector? Incandescent bulbs come on slowly with this type of detector to extend the lamp life. These are externally mounted on an electrical box ...