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.

1,102 questions with no upvoted or accepted answers
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1answer
204 views

Why don't HVAC service people want to use outdoor temperature sensors to increase efficiency?

Here in central Virginia, most houses use heat pumps with electric auxiliary heat. I have inquired with several different contractors about installing outdoor thermostats on my units to 1) disable ...
4
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5answers
1k views

What is the proper way to convert a pair of three-way (SPDT) switches into a single two-way (SPST) switch?

I'm in the process of replacing some of the light switches in my house with smart switches, Wemo Light Switches in this case. I've had no problem with the replacement of my One-way switches (SPST I ...
4
votes
2answers
4k 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/...
3
votes
0answers
68 views

Low Voltage wiring and Rough-In Inspection

Does anyone have experience, guidance, tips on what is required for LV wiring at rough-in inspection? I have run a number of speaker wires, coax, ethernet (CL2/CL3) but they do not all terminate in a ...
3
votes
0answers
50 views

Fried switches, light fixtures, or wire?

In an attempt to fix a wiring problem from five years ago, I made a huge error. Here's the scenario: Box 1: Has switch #1 in a four-way set up (it's a 3-way switch) and is where the power comes in. ...
3
votes
0answers
162 views

Water Heater not getting 240v?

My water heater stopped working a few days ago and I've been trouble shooting it ever since. I found water in the connection receptacle. the leak from the the Air Conditioning unit above it has been ...
3
votes
0answers
56 views

Breaker trips when both switches on circuit are on

I've got a ceiling fan/light wired to a double switch (like this: https://www.homedepot.com/p/Leviton-15-Amp-Combination-Double-Switch-White-R62-05224-2WS/202027008) The source is at the switch and ...
3
votes
0answers
131 views

200Amp Panel upgrade, Flush panel to Surface mount

I'm looking to get my house panel upgraded from a 100 amp FPE firestarter panel to new Square D Panel. The panel I want to use is surface mount and the one built into the house in the 1970's is flush ...
3
votes
1answer
577 views

Sub panel and ground rod installation: “high differential potential between the ground locations”

We have a dock (fixed-pier) that is about 40 feet from the house, and +100 feet from the main panel. 4-wire (2 hots, 1 grounded neutral, and 1 ground) run to a large junction box at the start of the ...
3
votes
1answer
216 views

Can Someone Help Me Identify This Switch?

I have a Swaby 5200 pump in my home, and I am hoping that someone out there might be able to suggest a replacement switch part number – or at least point me in the right direction. Pump model: 5200 ...
3
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2answers
2k views

Why my baseboard heater won’t turn with new thermostat?

I have a pair of electromod basement heater. The label on each of them show them show 750/1000W. Power supply to this is 240V I am trying to replace the old manual thermostat with a progrmabale one. ...
3
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3answers
3k views

How to replace a light fixture that has a 3-way light switch

Box] I have a light fixture above a stairwell. There are two live switches that control it, one at the bottom of the stairs, one at the top. The wiring is relatively new about 25 years old (all copper,...
3
votes
1answer
206 views

Did I replace receptacle with exact same configuration?

I recently changed a few receptacles and am seeking confirmation that I duplicated functionality in one particular receptacle. This receptacle is in the middle of a circuit. It had 2 screws for ...
3
votes
2answers
218 views

Checking ground current

Background: I had a contractor finishing my basement, and part of that was installing underfloor heating using several heating mats in parallel. It worked initially but soon after it just started ...
3
votes
1answer
272 views

Install recessed lights and chandelier with 3-way switches

I am remodeling my entry way and dining room to give a more open feel. Existing: 15 Amp breaker 12-2 Feed directly from the box two gang box outside of the kitchen 1 standard switch and 1 three ...
3
votes
1answer
112 views

Garden light connected to main lounge light stopped working

I have recently moved into a new property and all light fittings came with no shaders/were pretty basic. I have then proceeded to (safely) remove the light fitting of the living room, replaced it with ...
3
votes
1answer
298 views

How do I install a SensaSwitch on a 3-way circuit?

I recently purchased a SensaSwitch, Manual-ON / Timed-OFF (PDF of instructions) and I cannot install it in such a way that it performs as I desire. I have a switch at the top of my basement stairs and ...
3
votes
2answers
3k views

How can I wire a single gang 3-way fan control and dimmer?

My client's new fan is installed on a 3-way switch above stairs. The switches are located top and bottom, on separate breakers. The fan and light are operated simultaneously. The light attachment has ...
3
votes
1answer
2k views

what could cause my gfci to randomly trip?

I'm in the process of finishing my basement, and am almost done with the electrical rough-in. The whole thing is open studs at this time, so any sort of reconfiguration is easily possible. I have a ...
3
votes
1answer
412 views

How do I troubleshoot a newly installed non-working outlet?

I recently spent several frustrating hours trying to figure out why an outlet on a new branch circuit would not power a load even though there was proper polarity at the outlet, my non-contact voltage ...
3
votes
4answers
1k views

GFCI Problem with Three-Way Switch WAS Two Switches Neutrals Only, Switched Hots Not Used

I replaced an old two-prong receptable with a three-prong GFCI (no ground) yesterday. It won't reset. I found out that "downstream" there is a light on the next level down that is controlled by two ...
2
votes
1answer
36 views

Is all 220 appliance cable the same?

I have someone with a tanning bed that was hardwired in the previous home. To make things simpler for them, I'd like to just take a dryer pigtail and wire it up for them instead. I don't know much ...
2
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0answers
52 views

How to reroute grounding system to a grounding rod?

I'm building a ham radio room and need to ground my coaxial cable and antenna. If you are not a radio ham, you might not understand but it does not matter. All the resouces I can find online tells me ...
2
votes
0answers
60 views

How do I determine which ceiling fixure wires are which (two black, two bare)?

I'm trying to install a basic light fixture on a switch, but the ceiling wires are not color coded, probably because it's an old house. The ceiling box has two black wires and two bare wires. One of ...
2
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0answers
53 views

Is service entrance cable rated for outdoor use without rigid conduit?

I need to replace the service line for 200A service and the current line is just fastened to the exterior wall with straps. It does terminate at a service head but the rest is unprotected, including ...
2
votes
0answers
57 views

3-Way Switch with Dimmer - Humming?

We recently upgraded our dining room light fixture, which now has 8 light bulb sockets. In turn, the wife wanted to add a dimmer to the circuit to control the lighting. The light is control by a 3-way ...
2
votes
0answers
63 views

Drywall “box” around firewall penetration inside stud cavity

In my condo (three floor building) the interior walls are all Fireguard-grade 5/8 drywall attached to 11 gauge structural steel studs (which SUCK except for when hurricanes blow through). Each ...
2
votes
0answers
79 views

Adding neutral lug to older load center

In the process of installing a remote subpanel from my older backfed load center. The neutral/ground bar is attached to the service entrance via the screw midway, and the ground is at the base of the ...
2
votes
0answers
96 views

Euro modules, is there an actual standard for them? or are they just a de-facto thing?

In the UK over the last decade or so a system of modules and faceplaces known as "Euro modules" seems to have taken off. Modules and faceplates are available from a wide-range of vendors. A regular "...
2
votes
1answer
67 views

How can I use a switch for outlets to control a new overhead light?

I am trying to rewire our bedroom so that a wall switch that turns on/off half of all receptacles in the room will instead control a ceiling light and leave the receptacles (both halves) always hot ...
2
votes
1answer
136 views

How can I pull cable through wood and metal framing without damage?

I had to install a new wire for my water heater (higher amperage/bigger wire), and was drilling through the wooden top plate to snake the wire down the wall to the pass-through. Everything seemed ...
2
votes
1answer
66 views

Replacing 3-way Dimmer with Smart Dimmer

I'm trying to replace a 3-way dimmer set-up (currently a Lutron MACL-153M) with a smart dimmer. I have C by GE Smart Dimmers. After a lot of tinkering yesterday, I was unable to get it to work. I've ...
2
votes
0answers
66 views

120v breaker, 240v output

I am a pool service guy and a couple times i have stumbled across this, and always told the customer to contact a licensed electrician to resolve the situation. Breaker at the box that controls the ...
2
votes
2answers
130 views

Repairing a broken screw hole (gap) on a metal junction ceiling box?

One of the screw holes on a junction box on my ceiling has fallen apart, leaving a hole that is too big to fix a screw into (see top of picture). As a result, I cannot hang my smoke detector from the ...
2
votes
0answers
56 views

Can I use an outside feeder tap to run power to a garage?

I have a newly built garage that I would like to add a sub panel. I have a QO load center QOB8-16L 100S which is rated for 100 amps. However, I think 60 amps would be more than adequate for my needs ...
2
votes
0answers
58 views

Extend/splice 12/2 romex along concrete finished wall

I would like to extend some wiring for a counter outlet that is running behind a refrigerator, which currently encased in a metal "cable concealer" raceway. Note: wiring is in a raceway because most ...
2
votes
0answers
49 views

How do I connect surface wireway to a breaker box?

I am running Legrand/Wiremold 4000 series for a garage shop. The instructions for the panel connector (4086A) consist of a tiny picture that implies all I need to do is cut a large square hole in my ...
2
votes
0answers
52 views

In Wall Panel for Security System and Camera Cabling

I'm in the process of overhauling my home network and installing some door and motion sensors. I'd like to drop everything down into the Master bedroom, where I will install a panel that is set in the ...
2
votes
0answers
39 views

Thermostat wiring for ac

I recently installed a nest thermostat for our AC system. Unfortunately I was short sighted and just assumed all the wires were the color I needed. Since installing the thermostat our system won’t ...
2
votes
0answers
140 views

When running crawl space conduit, must the conduit be run through the joist via drilled holes, or can they be attached underneath?

I'm wiring my home for 110V and cat6e(48-0V). There is currently no wiring, just an air tight shell with interior studs exposed. There is a crawl space where I would like to run all of the conduit ...
2
votes
2answers
221 views

Can I feed a sub panel off my 200A service box? Or would I need to run wire from the inside breaker box?

Can I add a sub panel feed off my 200A service box? If so what are the requirements? Or would I need to run it from the main house breaker inside the house and wire from there? I currently have a ...
2
votes
1answer
285 views

Outdoor 50 amp 4-wire Outlet Install

I want to install an outlet for outdoor connection of an RV. However, the location of the service entrance box is close to a inside corner of the exterior of the house so the easiest location is on ...
2
votes
1answer
181 views

Black paste inside wire nuts?

I have read that older houses may have aluminum wiring, and to splice copper to it there is a less than desirable method of purple wire nuts using corrosion inhibitor paste. My house was built in ...
2
votes
0answers
117 views

Junction Box Blank Cover in HVAC Duct

I am starting a bathroom remodel second story that requires a length of NM wire to be lengthened by a few feet. I realize I can't do this hidden in a wall or floor and need this done in accessible ...
2
votes
0answers
55 views

Can I split a large amp 240 circuit into two lower amp 240 circuits?

I just bought a house. It has a double oven unit installed on a 50 amp 240V circuit. I need to replace this unit with two separate units, one 30 amp, 240V and the other 20 amp, 240V. Can I split ...
2
votes
1answer
776 views

Switches in other bedrooms turning on different lights after I put new light up

I recently put up a light in my bedroom but the switches in other rooms now turn on different lights, there are 9 wires altogether coming through the ceiling, 3 earth which are connected together, 3 ...
2
votes
0answers
40 views

Will the existing wiring work with the new thermostat?

I am looking to upgrade my line voltage thermostat from a Dimplex mechanical thermostat to a Honeywell digital thermostat. Both thermostat has 2 wires on its back. Would the new thermostat work if I ...
2
votes
2answers
98 views

What type cable and size should I use for my shop?

My existing overhead wire is triplex 1/0, 2 insulated and one bare. The power company is out of the picture because they do not provide service to a customer supplied pole. My existing wire is at ...
2
votes
1answer
402 views

Figuring out electrical connections for THREE electric baseboard heaters with single pole thermostats

I recently purchased a home (triplex) and in the basement unit, which is a one bedroom apartment, there are three baseboard heaters (bedroom, washroom, and living room). The issue is that the living ...
2
votes
0answers
825 views

Can I bypass an old fuse box and connect the service directly to the breaker panel?

We have an older home with a fuse box in house and also breaker box outside. This is second time now in last couple weeks that all the main house overhead lights and outlets have gone out completely. ...

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