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126
votes
2answers
13k views

What is the purpose of these holes on my wire stripper?

I have been using this wire stripper for a while, but I have always wondered what was the purpose of those holes in the center and above LOOP, and those teeth on the handles.
10
votes
3answers
16k views

Do I really have to fasten interior-wall electrical wire to a stud to keep it from moving?

I am fresh out of cable staples and would rather not go all the way to Lowe's just to get a box. What are the implications of not fastening loose electrical wires to a stud? It's not like there's ...
8
votes
1answer
4k views

Can I extend an electrical ground wire with a copper wire crimp?

I am working with an electrical socket and I need extra length on the ground wire. It doesn't seem unreasonable that I can attach an extra three inches to the existing one and attach it with a copper ...
6
votes
2answers
459 views

What is this lamp base wire clip and how do I remove the wire without breaking the clip?

I'm trying to replace the socket in an old desk lamp, and I need to pull the wire through. However, the wire is secured tightly by a black plastic clip at the base. I'm wondering what this clip is ...
5
votes
7answers
17k views

How should I wire for a security system during construction?

I would like to run wires in anticipation of a future hard-wired security system. However, I have yet to find any information that pulls everything together regarding what is required. From what I ...
5
votes
5answers
4k views

What's the suggested standard gauge wire for a given current?

I'd like to see a reference to an US or EU standard that lists in a table the suggested wire gauges for AC/DC and volts / amps.
5
votes
3answers
6k views

Is it safe to install a three pronged wire into a four pronged dryer?

I just moved into an old home that has a three pronged wall jack as shown below: I have a newer dryer that has a four pronged wire. Please see the back of the dryer, I've removed the four pronged ...
5
votes
1answer
1k views

Can i run my cables from the outside box to the inside breaker box through 2x4 studs?

I am turning our carport into a living room and we have a 100amp breaker box outside that feeds power into the breaker box on the inside of our house. the conduit is going to be in the way of the wall ...
5
votes
3answers
2k views

What gauge wire/cord do I need for these outdoor lamps?

I have two 700 watt outdoor halogen lamps, each connected to a splitter, then back to a power source. Given the distances illustrated below, what gauge cord should I use?
5
votes
1answer
155 views

Hangman's Noose vs Uni Knot

Is there any practical difference between the Hangman's Noose and the Uni Knot (a.k.a. Duncan loop)? The difference I see between the two is that the coils are wound inside the loop in the uni knot ...
5
votes
2answers
2k views

Are the wires for my generator transfer switch undersized?

I purchased a Reliance Q510-C transfer switch to use with a 50 amp generator at my house. The transfer switch is rated at 50 amps. I have wired it into my main electrical box. I also wired a 50-amp ...
4
votes
6answers
396 views

What can I use to lubricate CAT6 cables while installing them?

I am about to run some network wires inside the wall at home. I had already done so but apparently too much pressure on them while pulling caused one of the pairs to go bad and therefore prevent ...
4
votes
2answers
1k views

How do I connect a stranded wire to a bus bar?

A typical bus bar has this design: and connecting a solid wire to it is more or less easy. But how do I connect a stranded wire? I expect the following to happen: when I drive the screw in, the ...
4
votes
2answers
1k views

How can I route an unknown amount of wires through an outside wall?

I'd love to figure out the best way to make a reusable junction through an outside wall for routing cables through it. (Specifically, ham-radio coax cables). It would be fairly simple if I was going ...
4
votes
2answers
3k 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 ...
4
votes
4answers
2k views

How can I fix chewed through wires?

I have two standard two prong wall plugs my puppy has chewed through completely, and he managed to sink his teeth into a laptop cord as well. I'm thinking the wall plugs are history (a lamp and a ...
4
votes
1answer
188 views

Can I use romex in my unfinished, detached garage or should I use MC?

I bought my house with an unfinished detached garage. I will never finish the walls. The previous owner has junction boxes with romex coming out of them and going to the fixtures. I've only seen MC ...
4
votes
3answers
955 views

How should I label and organize my home electrical circuits?

I am looking to make the wiring updates in my home extremely simple to understand while doing so in a code-approved manner. I cannot find anything against wrapping a thin band of colored electrical ...
3
votes
3answers
9k views

is it possible to do a 3 way switch if power source is in the second switch?

In my research on how to install a 3 way switch, i've seen different ways on how to install the wires but i haven't found the schema that would help me in my situation. Here's a screenshot of my ...
3
votes
1answer
999 views

New light switch has blue, black, and white wires. Wall has black, white, and ground. Can I make it work?

I bought a new light switch that is supposed to allow me to automate my lights easier. Here is what it looks like: It has blue, black, and white wires. Coming out of my wall, however, I only have a ...
3
votes
1answer
142 views

Can I install wiring in the space used by a sealed air duct and PVC water supply lines?

I have a space between walls that is about 14" deep and 8 foot wide, and goes from the floor to the ceiling. This space is on the second floor. Petty much in the center of the house. The space ...
2
votes
1answer
2k views

Can I use a 20 amp breaker in the situation of having 15 amp wire connected to a 20 amp main wire?

Can I use a 20 amp breaker in the situation of having 15 amp wire connected to a 20 amp main wire? If I can't would using a 15 amp breaker be ok?
2
votes
2answers
259 views

Can I use THHN/THWN-2 within a lamp post?

Foreword: I've been using UF wire for about 10 years now, and I've really grown to hate it. It's hard to work with, hard to strip, and hard to pull through conduit. I prefer all my underground wire to ...
2
votes
2answers
1k views

Options for lubricating wires for conduit?

I am trying to pull four #8 stranded wires through a flexible PVC conduit that is 25 feet long. I can get the wires just a few feet into the conduit before they bind. I know there is a commercially ...
2
votes
1answer
510 views

What is the best way to run underground electrical and low voltage in the same trench?

I'm putting in a couple of new electrical lines for my back yard. I have a trench dug from point A, to B, to C, etc.. I then had a bright idea. Why don't I put speaker wires and CAT6 under ground ...
2
votes
2answers
2k views

How do I design the circuit for baseboard heaters?

I am designing the circuit(s) for my basement apartment (cca. 800 sq ft) baseboard heating solution. I am planning to buy Berko HBB Series heaters and distribute them as shown in the below table. ...
2
votes
1answer
2k 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
3answers
457 views

Inferring wire gauge from cable size

Is there any way to infer the gauge of the wires inside an NM cable from the size and shape of the cable? I reckon a round cable is generally -/3 W/G and a flatter cable -/2 W/G, but I do not know how ...
2
votes
1answer
367 views

What are these wires I found in my yard?

I was digging the holes for some crepe myrtle saplings and I sliced into a wire with one unlucky shovel stroke. They do not seem to be carrying any voltage, but I haven't hooked my multi-meter up to ...
2
votes
2answers
623 views

Where's the C terminal on my boiler control?

The new thermostat I purchased doesn't run on batteries, and needs 24 volt power. I have only a red and a white wire connected between the boiler and the thermostat, but there is also a third, unused ...
2
votes
1answer
4k views

Why doesn't my motion sensor light work?

I want to install a simple motion sensor (Lutron Maestro MS-OPS2) on a single pole switch in my garage. When I installed it the light would not turn off. The instructions (PDF) that come with the ...
2
votes
2answers
506 views

How close can speaker wire be to a recessed light before heat is a concern?

I'm currently building a home and have plans to install in-ceiling speakers in my family room when the house is finished. The package that the builder offers is obnoxiously expensive and I can't do it ...
1
vote
1answer
136 views

How can I protect a vending machine wire from being cut again? [closed]

A friend of mine operates a vending machine in a school. Oftentimes, there are issues when a snack gets stuck in the machine, the students will rock the machine. Rocking the machine is an issue, ...
1
vote
2answers
2k views

What gauge wire is typically used for the input to a home breaker box?

I have a moderately-sized home (~2400 sq. ft.) in the United States that was constructed in 1999. I am looking to build a home energy monitor to track my electricity usage versus time. Obviously, in ...
1
vote
1answer
127 views

Should I replace the neutral wire that I accidentally cut in a Romex cable when installing a new outlet?

So I'm installing a new outlet in my home. There's an existing Romex cable that goes up the wall into my attic above the new outlet. When I was stripping the wire to go in the box, I accidentally ...
1
vote
1answer
38 views

grounding wire from ceiling with no place to attach to the fixture?

I was took down my parents 45 year old kitchen light fixture to tighten a screw and when i went to put it back up i noticed that there was a grounding wire coming down from the ceiling but no place to ...
1
vote
1answer
84 views

What size breaker and wire do I need to feed a panel for a tankless water heater?

I purchased a electric tankless water heater and I would like to know the following? The unit requires 3 separate 40 amp breakers, one for each line. I have 200 amp service. The subpanel will be ...
1
vote
1answer
188 views

What size wire to use from house to wood shop?

What type/size of wire should I use for running power from the 200Amp service panel at my house to a subpanel at my wood shop? The length of the run is 300 feet. I need 220V service at the shop and ...
1
vote
1answer
38 views

Can I use flux core wire in a MIG welder that was designed to use argon gas?

My friend gave me a MIG welder that has normal wire with the Gas attachment. I was trying to get argon gas cylinder but had more trouble then expected. Now I'm thinking of just buying flux core wire ...
1
vote
3answers
256 views

How do I install a ceiling fan remote?

I am trying to replace a busted hunter ceiling fan remote. The transmitor unit from the old remote had 5 wires - live and neutral, and then 1 that was labeled "fan out", 1 that was labeled "light ...
1
vote
1answer
284 views

Leaving a hot wire in the wall or ceiling

I am redoing a ceiling fan with new wiring. I have the walls open at the switch box. There is an old knob & tube hot wire coming in and then it goes out to the ceiling fan. I have run new wiring ...
1
vote
1answer
1k views

Multiple Loose-Hanging Wires in Finished Wall

I am re-doing the wiring in my home and I have encountered a situation where I need to run 4 sets of 12-2 NM-B (Romex) wire from my attic down to the same fixture. Per 334.30, I am allowed to leave ...
1
vote
1answer
895 views

Should I run cable through an always damp crawl space or a dry soffit in the living area?

You guys are one of the best electrical help web-communities, so thanks for your time and efforts! I am advising some homeowners who need to rewire their first floor on Long Beach Island, NJ after ...
1
vote
1answer
28 views

Correct gauge of wire to power 2 ceiling lightnings

I was attempting a simple home improvement project that has slowly become a bigger job than I expected. So my aunt had a light bulb hanging from the ceiling in the corridor and wanted it replaced ...
1
vote
1answer
687 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: ...
0
votes
2answers
3k views

Is ceiling fan missing grounding wire from the ceiling box, and is this safe?

I recently had a contractor/handyman install a Hunter ceiling fan for me. It worked great, but my wife came home and thought it was too big. I ordered a different Hunter fan, and figured I could ...
0
votes
1answer
73 views

Electric line to subpanel

I'm running 2 100 amp 110 lines 35 yards from my well house main to a sub panel in my garage. Do I need to run a ground wire and a neutral wire or can I just run one of them from the sub panel to a ...
0
votes
2answers
153 views

Can you add a cable connector in knockouts in a breaker box after the wires are already in place?

A sub-panel has a cable of three 12 gauge wires for HVAC coming into the box through a big knock out hole. The HVAC people did not put a connector on the cable. Is there a connector designed to be ...
0
votes
2answers
110 views

Networking Phones Together in Building

I have a number siemens optipoint 500 economy phones. They have been used in an office environment in which the networking of the phones were managed by a third party. I would now like to use them in ...
0
votes
1answer
1k views

Is it possible to splice this garage door safety sensor wire with some other wire?

I currently have these sensors: http://www.amazon.com/Chamberlain-Liftmaster-41A4373A-Safety-Sensors/dp/B00283Q9AW An accident occurred a few days ago and the cable to the receiver was snapped ...