Questions tagged [wiring]

The installation of wire and/or electrical devices, to allow the transmission of electricity from one point to another.

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30
votes
3answers
16k views

When doing electrical work, what do I use to check wires are safe?

If I am thinking of replacing a light switch, a light-fitting, a socket/outlet or doing other work with household wiring where there may be 120 Volts or 240 volts present ... There is already a ...
20
votes
3answers
591k views

What wire gauge do I need for a 100 Amp subpanel at the end of a 60' wire run?

I am adding an attached garage to my house. I'm going to be putting in a 100 Amp subpanel which is about 60 feet away and run through the basement joists. What gauge wire do you recommend for ...
26
votes
5answers
294k views

Is it ok to have mixed grounds and neutrals on bars in a breaker box?

So to continue my line of electrical questioning (and perhaps narrow down my flickering light problem), I took a look through the two panels in this house. There is a 200amp main service in the ...
2
votes
5answers
920 views

What to do with a new duplex outlet when the tester says Hot & Ground are Reversed?

I switched out a regular outlet with a LeGrand Radiant Duplex Outlet, connecting all of the wires (2 White, 2 Black and 1 Green) exactly as the previous outlet was wired and according to the ...
10
votes
3answers
218k views

Where does the ground wire go in a 3-prong dryer cord configuration?

We moved to a new place where the dryer connection is 3-prong instead of 4-prong. The dryer was originally 4-prong, so we bought a 3-prong cord and installed it. It works fine, except I am not ...
39
votes
7answers
197k views

Can Romex (NM-B) be run through conduit?

A few days ago I asked an electrician if I could run Romex through conduit - he gave me a funny look and said "No, Romex is not allowed in conduit." When I searched online, there seems to be a wide ...
13
votes
5answers
122k views

What is the proper 'per code' method for running nonmetallic sheathed cable above a ceiling in the attic?

Can the wiring be run over the top of the ceiling joist, or must it be run through bored holes when running perpendicular to the joists? This is a non-habitable space, will have an attic entrance ...
30
votes
8answers
150k views

Can I run CAT5/6 cables parallel to electrical cables?

I am building a new house and am planning to hardwire network cables into each room. Can I run CAT5/6 cables parallel to electrical wires without introducing any general safety issues or losing much ...
7
votes
3answers
4k views

Can ground shock me? It's bonded to neutral in my panel

I have no outdoor outlets. I want to install a GFCI outlet underneath my main service panel. Inside the panel there is only one bar with both ground and neutral wires connected to it. If I connect ...
8
votes
9answers
178k views

How many outlets can you have on one 15 amp circuit?

In my rebuilding project I have counted 18 outlets and lights on one bedroom circuit that travels through 3 rooms. Is that ok?
6
votes
5answers
79k views

Why am I getting 50V at a light when the switch is off?

I am trying to put in a switch and a light it controls in a storage building and this is how I wired it. Click for larger view When I checked the wiring it registered 120V when the switch was on, ...
36
votes
7answers
49k views

How do I run ethernet cable through a wall cavity?

I want to install an ethernet jack in an interior wall of one room. I'd like to run the cable up through the wall cavity (so it is hidden) into the crawl space and back down another wall to another ...
32
votes
4answers
309k views

How do you know when and where it is safe to drill into a wall?

Lots of home projects involve cutting or drilling through walls (everything from nails, screws, or hooks to mount things to cutting through drywall and drilling through studs to run wire). In general,...
11
votes
7answers
70k views

Why is it safe to use 15 A receptacles on a 20 A circuit?

OK, the one answer I got was way off target, and another commenter couldn't figure out what I was asking, so I'm restating the question... Are 15A 3-prong grounded outlets actually rated to 20A, ...
10
votes
1answer
63k views

How can I install this programmable switch where a neutral is not present?

I'm trying install this programmable switch but the instructions do not match reality. The instructions refer to the existence of a black (load) cable and a white (neutral) cable supposedly coming out ...
15
votes
3answers
22k views

How do I run ethernet, speaker wire, and coax through a wall into a crawlspace?

I would like to run three low-voltage cables from my entertainment center through an old plaster wall, down (1-3 feet) through the sill plate, and into the crawlspace. The cables are Ethernet, ...
7
votes
1answer
16k views

What is a split bus panel, and how do I recognize it in the field?

I'm having trouble identifying a split bus panel. I design and install Solar systems, and lately (after Mr Wiley gave a few seminars to local inspectors) the local authority having jurisdiction (AHJ) ...
4
votes
1answer
7k views

When wiring a switch loop, which wire is which?

If you're wiring up a lighting circuit, where the power enters at the lighting outlet. According to the National Electrical Code, which wire should be "hot" and which should be "switched hot"? ...
9
votes
5answers
197k views

Can different gauge wiring be used in the same circuit?

I am extending a lighting and outlet circuit in a basement. The current setup has the following characteristics 15 amp. circuit breaker (200 amp service) 4 existing lighting fixtures using CFL bulbs (...
5
votes
6answers
34k views

Can I install a Subpanel (in a seperate building) using a 3 wire connection (2 hots and 1 grounded neutral)?

Can I use a 3 wire connection (2 hots and 1 grounded neutral) to install a sub panel in a separate structure if I install a separate ground rod to the grounding bus in sub panel? I have 8/3 w/o ...
3
votes
2answers
50k views

What is the maximum 12/2 wire length from a 20A breaker to a baseboard heater?

What is the maximum distance from a 220V/20amp circuit breaker to an 2000 watt electric baseboard heater using 12/2? At what distance would it require 10/2?
14
votes
6answers
162k views

How should I run wiring for my above-fireplace mounted TV?

I'm going to mount my 47" LCD above my fireplace. I'm not looking for arguments against this decision. I'm looking for wiring solutions. The diagram below should help explain the situation. ...
6
votes
3answers
67k views

How do I wire a GFCI receptacle using two black wires and two white wires?

I recently purchased an older home and wanted to install GFCI outlets in the kitchen. When I opened up the outlet, there were four wires (two black and two white) in addition to the ground. I ...
9
votes
2answers
5k views

How do I run a wire underground to an outdoor post lamp?

I live in Geauga county Ohio. My question is three part. First what type of wire do I need to run from the house underground to a post lamp 100 feet away? Second,does it need to be in conduit and ...
10
votes
4answers
292k views

Which side of a two-wire cable should be used for “hot”?

I bought a custom length of a 16/2 cable (two 16-gauge stranded wires, individually insulated). The two wires have identical colors and insulation; the only thing to tell them apart is that along one,...
7
votes
1answer
3k views

Why am I getting shocked by a water heater?

Background: I live in Metro Manila, Philippines where the electric distribution company, Meralco, delivers split-phase power to residential buildings. Our old (1980s) Meralco service drop consists ...
6
votes
2answers
21k views

Getting shocked by a neutral wire

I'm trying to figure out how I got a shock from a neutral wire. I didn't think it was possible until I read this article on being "in series with the neutral." Here's what happened: I was ...
0
votes
3answers
7k views

Can I install two independent gfci outlets in one double-gang box?

Cam I have two GFCIs connected to one double gang box in my laundry room and if so can I do a single line connection so that they both can work independently? I have a 12/2 going from the panel ...
65
votes
15answers
33k views

What should I consider regarding LAN wiring before building a house?

I am planning a small house (4 rooms, 2 floors, no basement, no attic, 120 sq.meters) and I want to run a lot of LAN cables throughout because of poor WiFi experiences in my apartment. Because the ...
19
votes
5answers
263k views

What is a GFI outlet used for, and where should I install them?

What purpose does a GFI serve? Where should they be used?
21
votes
4answers
25k views

What should I use to secure/organize data cable runs?

I am running Cat-6 and Coax in new construction. I am looking for advice/best practices on how to organize and secure the cables during the runs. I will be running 2 Cat-6 and 1 Coax to a single-...
7
votes
2answers
14k 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 ...
2
votes
6answers
174k views

How should I wire a ceiling fan remote where two switches are used to control the fixture?

I have 2 wall switches. 4 wires coming out of ceiling (black-hot, red-hot, white-common, bare- ground), a ceiling fan and a remote. How do I wire them and still be able to use wall switches? I can ...
12
votes
7answers
62k views

Is Switching the Neutral OK?

What’s the worst that can happen if i put a switch in the neutral instead of the phase? I just found out that 3 light bulbs sockets in my home are connected this way, it first came to my mind to ...
8
votes
3answers
284k views

How should I connect the ground wire for my light fixture?

I am replacing a light fixture in my bathroom and have the following setup: The electrical box is plastic The wire coming from supply has black (hot), white (neutral) and copper (ground). The light ...
7
votes
3answers
39k views

Are non-GFCI outlets that are downstream of a GFCI outlet ground fault protected if they are fed from the GFCI outlet's load side?

Are non-GFCI outlets that are downstream of a GFCI outlet ground fault protected if they are fed from the GFCI outlet's load side? If those non-GFCI downstream outlets were not fed from the GFCI ...
5
votes
2answers
4k views

How do I wire my wall-mounted HD TV?

This image wall-mount setup should give a good idea of the current TV set up on the wall. I wanted to use a SmartStrip to power my TV and all the other devices (receiver, BluRay player, Wii, cable ...
3
votes
3answers
15k views

House wiring and grounding. How do you retrofit an old house and ground it?

A contractor looked at our house and told me that you can't fix a house (with old wiring) that has some outlets that are not grounded. He said that you can go on YouTube and search the internet and ...
1
vote
2answers
4k views

Can a white (or other color) wire be remarked to serve as a grounding conductor?

In a question related to plugging in a device with a 6-20P Plug (240V Ground + 2 Hots) into a 10-30R (120/240V Neutral + 2 Hots) receptacle, I suggested replacing the outlet with a 6-20R and using ...
1
vote
1answer
3k views

Why isn't this 3-way wiring working?

Below is a diagram that I drew to help me rewire a couple of switches. The left switch is a standard 3-way switch. The right switch Cooper 275W-BOX combination single pole and 3-way switch. The single ...
18
votes
7answers
21k views

What is the right way to strip power wires?

I've been working with electrical circuits as a DIYer for years, including electronics and powerline work. But one thing I always feel like I do a terrible job at is stripping wires: both the outside ...
6
votes
4answers
5k views

What are some ways to wire rear speakers in a home theater system?

I have two rear speakers, that I never use, since I don't have a good way (yet) to wire them. I have a hardwood floor. And the side of the room that is nearest to the TV+Audio source is open. So I don'...
4
votes
2answers
3k views

Can I substitute two wires for one heavier-gauge wire?

Can I substitute two 14-gauge wires together for one 10-gauge wire? Using it from the generator RB-30 remote box, to the transfer switch inside a 6', 10-3 whip in the basement.
3
votes
4answers
9k 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
4k views

Do both legs in 220V have to be switched?

I posted this question but for some reason I can't get back into my account: Is it up to code to do a parallel circut with 220V? Is there a limit to number of splices? Most things I see with 220V ...
2
votes
1answer
4k views

Hard wiring a 4-wire oven to 3-wire outlet?

I am replacing an old 4-wire oven with a new Kitchen Aid 4-wire oven. I have 3 wires in the outlet box (black, white, bare (ground)). The old oven was connected the following way: From the oven the ...
1
vote
1answer
497 views

How would I feed a subpanel from this service pedestal?

I would like to power a shed at a total run of 80 feet from this 200 amp service. We mostly need lighting and outlets for tools. Two 20A circuits would be fine, but the ideal scenario would be a local ...
34
votes
5answers
15k views

Why does my home's power fade and surge when I plug things in?

I live in Texas. I ran 300 ft of aluminum electric direct-bury 4-4-2 from the pole on street to my new home. The pole is metered and yes, I had my utility's blessing to do so. Everything worked ...
30
votes
4answers
5k views

How to future-proof a long cable run

I'm starting on a project that will involve digging a long (roughly 150-200 meter) trench from my house down to the road. The trench itself will be a considerable expense and so while the ground is ...
12
votes
10answers
117k views

How can I run Cat5e cable through a completely finished house?

My family and I are interested in buying a house that was built in 2002. This house is two floors on a concrete slab with a finished bonus room upstairs so there is no attic other than above the ...