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 ...

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2answers
10k views

Do you have to mount the main electric panel on a piece of plywood?

Do main panels have to be mounted on a piece of plywood? Can it be mounted in between two studs then insulating fiberglass behind it?
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1answer
479 views

How to identify circuit breaker to non-functioning built-in microwave oven?

I have a wall-mounted over-the-range microwave oven that is completely non-operational at the moment; from the user's point of view, it's as if it were unplugged, but it is. Unfortunately, access to ...
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2answers
1k views

Why are my dimmer switches malfunctioning?

I have two dimmer switches that have started malfunctioning. They are in the same box with two other standard switches. Each controls a set of three small flood lights. There is no other way to ...
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1answer
220 views

Is it safe to replace a GFCI breaker with an arc fault breaker?

We recently had our electrical panel replaced/upgraded and I noticed that our GFCI breaker was replaced with an Arc Fault breaker. Is that safe? Are GFCI breakers obsolete now?
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1answer
137 views

Does this arc fault breaker manage one or two circuits?

I recently tested our breakers to see what was mapped to what. In the process of doing this, I noticed that our arc fault breaker is handling a LOT. Specifically: 4 bedrooms 2 bathrooms Family ...
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2answers
125 views

What's the minimum amount of electricity used by an appliance?

My Kill A Watt P4400 by P3 International shows 3 watts electricity usage if anything is plugged in. Do things plugged in, regardless of whether they are ON or OFF, really use a minimum of 3 watts or ...
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4answers
3k views

How do I fish a wire into an existing electrical box?

I have a 2-gang switch box that houses two light switches. I'm replacing one of the switches with a Honeywell Programmable Light Switch PLS751, which requires both an ungrounded (hot) and a grounded (...
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1answer
149 views

Can I prevent power theft?

I have heard stories about miswiring and other, less accidental ways that power gets stolen, especially in rentals and condos. I would like to protect myself from false charges if I end up moving into ...
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2answers
86 views

237V seen across terminals of a dimmer switch when 'off'

I have a household, dual module dimmer switch. One module is working and dims a 3A sidelight loop, the downlight loop with 4 drivers doesn't work and I'm fault finding. I noticed on the working ...
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1answer
1k views

Do I have to hardwire my electric garage heater, or can I use an existing 240V receptacle?

I just purchased a 17000BTU heater for my garage. The instructions say to hard wire it with 10/3 and 30amp breakers, 240 volt. The company says the warranty is void unless it is hard wired. I have an ...
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2answers
313 views

Can I use a normal 240v weatherproof on/off switch for an electric fence cut out?

A normal mains switch can be much cheaper and you could have a light to show when its on
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1answer
3k views

Is it OK to run 12-3 cable to a ceiling fan from a switch that's wired with 12-2?

I'm installing a ceiling fan into a room that has no existing ceiling mount (no light or ceiling fan previously existed). I've got a ceiling fan mount in place with a supporting brace that can support ...
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3answers
3k views

What should I do if my vacuum trips my AFCI device?

I have a vacuum that trips the AFCI device of the circuit that services my bedroom. The vacuum has some age on it, and there is some wear on the motor's commutator. This wear causes electrical ...
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2answers
215 views

How can I insert a receptacle into this junction box?

I want to install a receptacle into an existing junction box (photo below). Within the box, there are three neutrals (white) and five hot (two black, two blue, and a red). All of the wires have wire ...
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2answers
1k views

Wiring the Auxiliary switch on a 3-way switch

So, I am currently trying to wire a 3-way switch, but specifically the Jasco 45609 and its auxiliary switch counterpart the Jasco 45610. The Jasco 45609 has 5 wire inputs: Load Line Ground Traveler ...
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1answer
8k views

Is it “normal” for a vacuum cleaner to trigger an arc fault breaker?

We recently had our main electric service panel upgraded (from a 50 year old 100 AMP panel to a 200 AMP panel). As part of the upgrade, the electrician installed an arc fault breaker on the bedroom ...
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2answers
487 views

How should I mount a rework box if it has to go through an MDF/wood panel and drywall?

I need to install a combination power and low voltage box in the ceiling of my finished basement for my home theater projector. I can't bolt the projector mount directly to the studs because of ...
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1answer
44 views

Can I share the dishwasher or other appliance lines from adjacent room lines?

I've read the posts by Tim and Mitch posted in Sept. I'm remodeling the kitchen with all new wiring. I've never had a dishwasher, but will at some point. I only have enough space for a 24"er, so ...
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1answer
3k views

Do I need conduit for an indoor sub-panel feeder line?

I'm adding a 100A sub-panel to feed a stove and water heater. The sub panel is indoors and in the same building as the mains panel. Do I need to run the supply feeder in conduit? I'm in Michigan and ...
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3answers
679 views

How can I check for electricity theft?

My electrical bill is very high despite less usage. I fear there is electrical theft used by my landlord. How can i check this? The meter is under lock and access provided only on request. Please ...
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2answers
714 views

Did I damage the breaker by incorrectly wiring a generator?

During a power outage I attached my generator incorrectly (I have never done this before - I just was not paying attention). Anyway, I crossed the ground at the box with the black. When I turned on ...
2
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2answers
387 views

How can I connect a receptacle to a two wire extension cord?

How do I hook up a wall outlet to a 2 wire extension cord? My cord broke and I want to put a regular 110 outlet on it.
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1answer
51 views

Can I go from a 3-prong outlet and connect to a 2-prong outlet and switch?

I have rewired the first 2 outlet in a circuit with 14-2 wire. However, I do NOT want to rewire the rest of the circuit because it is inside non-accessible walls. The rest of the circuit is a front ...
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3answers
30k views

Is is safe to plug a surge protector into a 2-prong outlet using a 3-to-2-prong adapter?

I live in an apartment that has essentially no 3-prong electrical outlets. I need to plug in a modest amount of computer equipment (which has a mix of 2- and 3-prong plugs), and I want to plug this ...
2
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3answers
5k views

Can I connect a portable generator to a subpanel to backfeed my house?

I have a portable 6500 W generator. I have a main house electrical panel and a subpanel in my garage, which are on opposite sides of the house. My subpanel is on the outside wall of my garage. The ...
2
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1answer
101 views

Why electrical switches are rated lower for led than incadescent lights?

I bought a dimmer that supports ic, halogen, led and cfl lights. It says 600w for incadescent and halogen and 150w for led and cfl. Why is the difference? What happens if I put it in a circuit with 8 ...
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1answer
4k views

Can I run NM-B inside EMT conduit for protection? [duplicate]

If I'm adding some new receptacles to a garage, and the wiring will be run surface-mounted to walls and ceilings, I think protecting the wiring with EMT conduit is probably a wise way to go. I'm ...
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2answers
2k views

How are equipment grounding conductors counted for determining conduit or junction box fill?

Suppose one is doing junction box fill calculations for a typical NM-B installation such as the one shown below for a switch box with one normal and one three-way switch. Which of the wires count ...
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1answer
30k views

How can I determine circuit breaker requirements for an electric range?

I recently had a new range installed and when an electrician was visiting, he pointed out that the circuit was over capacity because the range was rated at 12.2KW at 240V. He said 12,200 W / 240 V = ...
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1answer
404 views

Residential electrical installation, at what voltage is a licensed contractor required?

I'm trying to figure out regulatory requirements for residential electrical installations. Specifically, when is a licensed electrician required by code to perform an installation? Obviously you don't ...
3
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2answers
2k views

Why was the ground for this fluorescent fixture not connected to the ballast?

I just purchased a set of fluorescent fixtures that are fitted with a plug to connect to a standard 3-prong receptacle. My intention is to replace the plug with Romex cable, and wire the fixture ...
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2answers
8k views

What should I do with the exposed grounding wire during a conversion from hardwired to plug in light fixture?

I am working to convert a hard wire light fixture which I have purchased to a plug in light fixture. The light fixture was designed for outdoor use, but I will be using it inside. Coming out of the ...
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2answers
3k views

How do I replace this switch with a timer?

I was trying to wire in a timer switch for a vent fan. When I went to replace the switch (which I knew was a 3 pole) I was baffled by the way it was wire. 4 wires run into the box, two of the hot ...
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1answer
93 views

How do I repair a bedside Lamp? [closed]

My beloved bedside lamp fell down, on the carpet, so it wasn't a big hit, and stopped working. Now, I tried to replace the bulb, but it doesn't change anything. Since this had happened to me another ...
0
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1answer
146 views

How can I extend the wires inside a transfer panel?

I am installing a 200 amp transfer switch to implement in an emergency when needed. The feed wire from my 200 amp panel inside the house will reach inside the transfer box but not all the way to the ...
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2answers
188 views

What is this single pole switch to empty ceiling box blows breaker when switched on

I would appreciate some help thinking through what are the possible problems in the following situation? A newly wired circuit from breaker box ( 20 amp 12 AWG wire) to front of the house (longest ...
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2answers
6k views

How should I install a thermostat for a baseboard heater?

How would I go about installing a thermostat for my bedroom's baseboard heater? I've seen lots of articles on how to replace an old thermostat but I'm installing a thermostat for the first time here. ...
4
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2answers
1k views

When replacing a circuit breaker in the service panel, how can I determine which neutral is associated with the hot wire?

In my service panel I would like to upgrade two standard circuit breakers with AFCI breakers. AFCI circuit breakers differ from standard circuit breakers in that you attach the hot an neutral to the ...
4
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2answers
5k views

Is a splice permitted in a PVC conduit body?

I'm talking about something like this Type LB Conduit Body
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3answers
450 views

Why do my LED Christmas lights glow when plugged into a light fixture via an adapter?

I have an outside light that is controlled by a light switch inside. I took the light out and put a adapter to plug in an extension cord to run LED Christmas lights. When I turn the switch off, just ...
4
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4answers
14k views

What is the purpose of the “grounding” tab/wire on a 3-prong to 2-prong adapter?

We've probably all seen these guys... They come in handy when you need to plug something with three prongs, into something with two prongs. What I've never understood was, what the heck is the "...
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3answers
2k views

Why would my TV turn off/on when connected to a surge suppressor?

I have a very strange problem which may or may not be the TV. The TV is plugged in to a surge suppressor with the rest of my home theater. Satellite box is also plugged in to the suppressor, ...
3
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3answers
38k views

What is the typical dishwasher/disposer electrical connection?

I need to provide power to a instant hot water dispenser that I recently installed myself in our circa 1950 home. I'm about to have my dishwasher replaced and am wondering what the typical electrical ...
3
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1answer
494 views

Can I plug a 15A snow thrower into a 15A receptacle?

I'm planning to buy a snow thrower with a 15A motor in it. I have an outside receptacle that's rated for 15A and so is the breaker in the electrical panel. I'm wondering if this will work without ...
4
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2answers
31k views

Can I replace a 15 ampere circuit breaker with a 20 ampere breaker?

When I plug-in a conventional heating pad or a hair dryer into any bedroom duplex, the lights dim; and/or trips the circuit breaker. The home is of new construction-- placed in service 31 Dec 2013. My ...
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1answer
382 views

Is it safe to connect a timer to an instant hot water dispenser?

I'd like to connect a timer to my new instant hot water dispenser. The installation instructions mention not to use an extension cord, but I'd like to make the timer accessible under the cabinet so I ...
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3answers
671 views

What are the pins in this socket?

What's the correct orientation for a plug in this outlet? What are line, which are neutral, which is ground? It's from India.
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2answers
9k views

How can I find the first receptacle in a circuit?

I know how to wire a GFCI receptacle and all the things to go with it in doing so. But what I do not know is the following. I understand the GFCI receptacle should be first in line to protect the ...
1
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1answer
191 views

Integrating into knob-and-tube wiring: okay to borrow a ground [duplicate]

I have a mixture of knob-and-tube and NM-B. If I'm extending from knob and tube, but I have a (different) an NM-B circuit nearby, is it technically allowable to ground via ground wire in the other ...
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2answers
1k views

Wiring Bathroom Fan Switch

I'm trying to wire a new single pole dimmer (two black wires, one ground) and single pole switch (no wires, just screws) for the fan in my bathroom. What I see coming into the box is three separate ...