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.

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575 views

Why is my bedroom light not working?

I'm after some advice please. This afternoon I was replacing a ceiling light fitting with a pendant fitting in my boys new bedroom. Put the bulb in and no power. Checked the bulb and it works, ...
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1answer
279 views

Why is one half of a subpanel not working?

I have 12/3 wire running out to my garage. I have a double 20 amp breaker in main box and a subpanel with two single 20 amp breakers in the garage with black to one breaker and red to the other. The ...
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1answer
84 views

Trip switch goes off 50% of the time when turning off an appliance

I have my computer attached to a six plug board that has its own on/off switch. It also has a power light and an 'earth' light which both are on. When I click off the board using its own switch about ...
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0answers
308 views

circuit breaker problem after removing ceiling fan

I removed a Hunter Ceiling Fan. I went to my circuit box and turned off the power from the circuit breaker it was on. I capped the wires and then went to my circuit box to reset my circuit breaker. ...
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3answers
4k views

Why would a short cause the main breaker to trip instead of the branch circuit breaker?

In our home, we have two electrical panels. One main panel (in the basement) and a sub panel on the first floor. The lights to the kitchen on the first floor run to a breaker in this sub panel. We ...
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2answers
3k views

Does the neutral wire float or go to the neutral bus on a sub panel?

Does the neutral wire float or go to the neutral bus on a sub panel?
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1answer
4k views

Can I replace two light switches with a single light switch?

In my basement family room I have two sets of track lighting on either sides of the room. Each set is controlled by it's own dimmer switch, and both dimmer switches are in the same box in the wall. ...
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3answers
7k views

Can you run a junction inside an outlet or recessed light

I have been working on finishing my basement and am starting my rough in electrical. I am learning as I go and have gotten most of the basics down.. calc load, box size, stapling, supports etc. One ...
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2answers
1k views

De-coupling fan and lighting switches?

Background on what I'm trying to do: This question appears somewhat similar in concept to Can I control a bathroom extractor fan independently from the light? however, in my case, I believe the ...
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1answer
421 views

Why do I hear intermittent speaker hum that goes away when I turn lights off or on?

I'm hearing speaker hum in a stereo system that I recently hooked up. I can't pinpoint when the hum begins, but I've identified that turning certain lights off or on in the same room eliminates the ...
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1answer
24k views

How can I mount a security camera on the outside of the house?

I'm tasked with mounting a security camera on the outside of the house and I'm not sure what would be the right way to do this. There are two basic problems: how to mount the thing and how to run the ...
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2answers
3k views

How can I calculate the Btus needed for a single room A/C unit?

How many Btus is recommended for a room about 35 square meters? I have 2 units with 13,000 Btus each. I'm thinking it should be enough, but the room is just so-so cool. I can never say it's COLD in ...
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4answers
16k views

How can I calculate the power consumption of an A/C unit?

I have an AC unit with the following specs: Cooling Capacity: 1260 kcal/h, 1.47kW, 5000 Btu/h Fan Motor Power: 0.034 kW Current: 0.155 A My question is how much power does this unit actually ...
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2answers
890 views

What are the code requirements for installing a ceiling fan alongside a fire sprinkler?

I have a fire sprinkler in my bedroom ceiling which is right in the middle. I want to install a ceiling fan. What are code requirements to follow?
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2answers
8k 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 ...
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1answer
4k views

How does a multi-tap motor speed control work?

I have a Home Depot, undocumented, no-name ceiling fan and I've messed up the speed control connections, and I'm trying to understand how the circuit works. I found a circuit on the internet which ...
3
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2answers
12k views

How can I install a ceiling fan, recessed lights, and receptacles on the same circuit?

I believe the configuration in the image below is what I need in order to power a ceiling fan and recessed lights on two separate switches out of a two gang box using the existing cables. However, ...
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0answers
55 views

What size of transformer do I need if I have to bring a 208Y/120V service to a structure and the power company provides a 480 V service? [closed]

Can I use a 150 V, 250 V, 300 V, or 400 V transformer for a 208Y/120 V service to a structure with the power company providing a 480V service?
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1answer
476 views

Can I install a subpanel using only two ungrounded (hot) conductors and a grounding conductor?

we removed the inside part of an air conditioner / heater from a mobile home. we plan to use this area as a small pantry. The wires that were connected to the heater is 2 black connected to 2 seperate ...
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1answer
189 views

Finding one power wire to two lite switches. ugh!

I bought this house one year ago, have had some problems with its electrical. My bathroom switch controls bathroom clothing closet light and the bathroom light. I notice it really sounded funny at ...
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1answer
11k views

Sump Pump Trips GFCI Receptacle. Is a single, dedicated non-GFCI receptacle safe?

I recently replaced my sump pump in one of my two sump pits. To comply with codes, I replaced the outlet with a GFCI type outlet. Unfortunately, once I turn the power back on, the GFCI trips ...
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0answers
113 views

What should the voltage be on an unused neutral line in a 3-phase supply?

I am currently setting up a machine in a trade show. The machine uses 480V 3-phase power with no neutral needed. The show electrician connected the power to the machine and just taped off the neutral ...
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3answers
27k views

Why does my laptop charger make a spark when plugged in?

From time to time (not always but often enough) when I plug my laptop's charger in the wall outlet it makes a spark (even if I use different outlets it's the same). Why does it do this? Is this a ...
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0answers
260 views

Is a standard power outlet sufficient for a 2.8 kW oven?

I'm moving some of my kitchen appliances around, where the oven is going where the Dish Washer was. The Consumer Unit has just a single breaker for all kitchen appliances (except the cooker hob, which ...
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1answer
233 views

What does this (electrical) value mean on my washing machine's back?

The electrical parameters of my washing machine are printed on the back. Among them there is a value for amperage: It says 10A but I don't know if that means that I need a fuse of minimum 10A or ...
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1answer
58k views

What size wire should I use to feed a subpanel in my garage?

My main panel has been upgraded to 100 amps. I would like to add a subpanel in the garage which would supply: 20 amp Mig welder running on 120 volts, but later upgrade to a larger Mig welder as i ...
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0answers
197 views

What type of junction box cover do I need?

We are building a set of shelves to cover up a sewer pipe in my basement. The shelves will have a false back that covers the pipe then have usable shelves in front of it. The only problem is that ...
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4answers
10k views

How to add indicator on a light switch to indicate the outdoor 3-way light is on?

Have some carriage lights outside my garage that can be turned on from inside the house. It's common that the switch will get flipped and the lights will stay on when they're not wanted. Is there ...
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1answer
1k views

Can I substitute halogen bulbs for incandescent bulbs?

Instead of three 40w light bulbs, can I use only two 43w halogen light bulbs in a ceiling light fixture with 3 lamp sockets rated at 40w maximum per socket?
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2answers
989 views

Is it against NEC code to re-use pulled cable?

I'm re-wiring parts of my house and have pulled some 12/2 out. Is it against NEC code to re-use that cable? I didn't have to pull that hard to get the cable out and there doesn't appear to be any ...
7
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2answers
627 views

How should this circuit be properly grounded?

I am hiring an electrician to do the work so my question is more for my education and helping me ask the proper questions to the perspective contractors. Purchased a condo recently and want to put in ...
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1answer
3k views

Can 22 AWG Solid Copper carry 24 VAC?

I have this irrigation caddy unit, and it requires 24VAC. There's a location outside my house with one ethernet cable and another brown cable with four solid copper wires (black, red, yellow, green). ...
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1answer
323 views

Is it possible that this GFCI receptacle is grounded without an equipment grounding conductor being connected?

I was attempting to upgrade an old outlet to a GFCI outlet. There are only two wires one black and one white. There is no ground wire. However the receptacle tester read "correct wiring". Is it ...
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1answer
235 views

Joining 8 wires into one

I have the cables from 9 bulbs joined into one using a screw terminal temporarily. What is the best thing to use to do this in a way that's waterproof and suitable for outdoor use. Whatever i use ...
6
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1answer
424 views

Is it okay two breakers are controlling the same outlets and appliances?

To be specific, we recently had some electrical work done. The electrician added a second panel. He left without labeling anything. So today I've been testing outlets and switches trying to figure out ...
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4answers
283 views

What does wire loops on the wall for?

I bought a house recently, and there are wires in the walls under stucco. But in basement these wires are go out as a loops not far from the ceil. What are they for? Are they for lamps? If yes, then ...
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2answers
2k views

What are the pros/cons of different wire connectors on a switch/outlet? OR How can push-in wire connections fail?

Prompted by an answer on Concerns about replacing a worn out light switch Also related: When to use holes instead of side terminals to wire an outlet To my knowledge, electrical components ...
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7answers
8k views

Will switching to LED lightbulbs make a significant difference in my electric bill?

I asked Reliance Controls about a THP103 meter that I was having trouble with. Turns out that it's not a true RMS meter and thus is unable to give you accurate readings on a CFL or LED installation. ...
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1answer
156 views

Why Does Over Kitchen Sink Fluorescent Use More Watts Than Bulb Says [duplicate]

I have an Efergy Elite unit that measures the watts used for any circuit its connected to. Right now I'm using it to monitor the circuit with our fluorescent light over the kitchen sink and something ...
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4answers
3k views

Concerns about replacing a worn out light switch

Our home is about 3 years old. New construction. New parts. The main lights in the kitchen are a 4-way circuit (3 switches, + lights). Since we primarily come into the room from one side, one ...
7
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3answers
2k views

Why am I getting strange results when using a power meter to measure CFLs?

Over the years we have replaced just about every bulb in the house with a CFL. But here is the problem. Our electric bill is going up and not down. When I moved here 3 years ago we spent about ...
6
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2answers
10k views

How do I install this flush-mount ceiling light?

I bought a new flush-mount ceiling light and am having a tough time figuring out how to get it installed. The instructions that came with it are completely useless. Here are all of the pieces that ...
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2answers
1k views

can we use UPS as stabilizer for 1.5 ton AC?

I bought split A.C 1.5 ton Samsung AR18FC5efbh model. Can I use an 800VA Microtek UPS as stabilizer for this 1.5 ton A.C? AC Specs ...
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4answers
1k views

Any problem with installing two identical circuit breakers in series?

Suppose I want to reduce risk of a circuit breaker malfunctioning and failing to disconnect a shorted circuit. What if I install two identical breakers sequentially (one after another) so that if one ...
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1answer
153 views

Why do I detect voltage on my ground of surge protector?

Renting an older home and upon moving in was saddened to see outlets without grounds (two prongs). So, for one of the outlets I bought a 2 to 3 prong with ground clip and ran the ground to some vent ...
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0answers
115 views

Terrarium electric board

[hope this isn't off topic for this board] I'm doing a DIY electric board for my terrarium: in case something goes wrong at least the whole electric circuit won't switch off. My current setup is a ...
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1answer
508 views

How do I detect live electrical wires with a degree of confidence?

I'm using a Zircon stud finder that can supposedly detect live electrical wires but I get inconsistent reading. Is this normal? Anyways back to the original question, how can I detect live electrical ...
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0answers
371 views

What is the part name/type for my fridge door sensor connector?

I have a three-door LG fridge. Each door has a button that gets pushed in when the door is closed, so it can turn off the light, etc. The button is connected to the wiring with a U-shaped plug ...
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1answer
1k views

One switch controlling 2 lights

I am replacing a 3-way switch that controlled two lights in a bathroom. There is only one switch, but controls two lights. The old switch worked fine. But now when I replaced it, in one switch ...
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2answers
508 views

Does NEC allow for recessed lighting to be placed in a vertical wall?

I am about to start running electrical in my bathroom remodel and I am considering options for lighting. I have a wall on one side that has 5.75" of space (this was for recessed shelving in an ...