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6
votes
1answer
343 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 ...
0
votes
0answers
86 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 ...
1
vote
4answers
5k views

What would cause an AFCI breaker to trip under no load?

I have an AFCI Breaker that trips with 0 load - nothing plugged in, no lights on. To test that power is getting to the room, I turn on the overhead CFL lights (very light load) and flip the breaker. ...
8
votes
4answers
961 views

How can I automatically disconnect a coffee maker and space heater without tripping the building's 20A circuit breaker?

My small office has a 20A breaker and we have to run a space heater in the winter or else we freeze to death. Whenever someone turns on the coffee maker, the office circuit breaker trips and ...
3
votes
3answers
3k views

What ampacity circuit breaker would I need for an 18 amp electric heater?

What ampacity circuit breaker would I need for an 18 amp electric heater? Here's a link to the model (IEP-4024), it's North American, 240 volts, 4000 watts, installing it outdoor.
1
vote
0answers
552 views

Why do I have a 3 wire/double pole breaker for kitchen receptacle?

I am switching my kitchen receptacle to a GFI; it has 3 wires. I'm pretty sure I have to break the bar between the two hot screws, thus making the top and bottom on a separate circuit. What is the ...
7
votes
2answers
2k views

How can two different breakers both turn off the same circuit?

I have a 40 yr old home with circuit breakers. While looking for the breaker to turn off a circuit (I was replacing a light switch), I found that two breakers, on the same side of the bus, but ...
0
votes
2answers
8k views

Where in the breaker box should I terminate the neutral wire from my dryer circuit?

I am looking for an answer to something I am lost about, hopefully I can fins some help. I recently moved into a new home. The previous owners had a gas dryer and no outlets for an electric dryer. I ...
3
votes
1answer
1k views

What are my options to repair a broken tab on a bus bar?

My A/C went out this week. The problem was a broken tab on a bus bar with cut power to one phase of the 220v circuit. My HVAC guy was able to get me going again by swapping the A/C unit to the dryers ...
1
vote
1answer
2k views

What could be causing a new 20 amp dedicated circuit supported by a GFCI breaker to trip?

I installed a dedicated 20amp circuit home run to support a single duplex outlet in a bathroom. The GFCI breaker is wired correctly. However, When I plug in a load such as a light a the breaker ...
3
votes
1answer
341 views

How difficult would it be to replace these fuses with circuit breakers?

I had a fuse blow last night. While the short-term plan is just to replace the fuse wire, in the longer term I'd like to switch them out for circuit breakers for the added safety but mostly for the ...
1
vote
1answer
2k views

Why is the circuit breaker for my furnace stuck in the off position?

The breaker for my furnace is stuck in the off position. We were away for the winter and had someone shut it off, and now the breaker won't turn on at all. We shut off the thermostat upstairs thinking ...
4
votes
5answers
4k views

How Do I Power A 220 Water Heater Off Two 110 Breakers

First off I know this is not the best idea. To start my 200 Amp Main has suffered a partial failure and as it is old (60s) and unusual it will be very hard or impossible to replace it. Since the main ...
3
votes
2answers
554 views

Why does the breaker keep tripping on a circuit with two rooms' lights and a sewer pump?

I have a circuit-breaker that is connected to lights in two rooms, and to a sewer pump in the basement. I had the sewer cleaned out and the pump inspected, and no problems were detected. I then had ...
4
votes
1answer
238 views

Can I wire a secondary 240V breaker box for lab equipment from Europe?

I have a dental lab in Europe and might want to move it to the USA. Some of the equipment rates as high as 4kW, and the the total maximum draw is 15kW for the whole lab. Can I wire a secondary breaker ...
3
votes
2answers
3k views

Why does the breaker trip occasionally after I installed a new light fixture?

We bought a house a couple of years ago with a covered light fixture box in the ceiling (a blank cover over a wired box and a blank cover over the switch box). I recently modified a plug-in pendant ...
6
votes
7answers
6k views

How important is circuit breaker breaking capacity?

All else being equal circuit breakers can have different "breaking capacity" - it's the maximum current which the breaker can disconnect and it's typically several thousand amperes. The idea is that ...
6
votes
4answers
22k views

How can I tell if a circuit breaker is worn out?

I was installing a light and tripped the breaker (in retrospect, should have turned the breaker off before starting). When I finished installing it I reset the breaker and tried the light switch. ...
5
votes
1answer
1k views

What is the primary function of the main breaker in a breaker box? How does it differ from other breakers?

Location: California | United States I'd like to better understand the roles of main breakers and sub-breakers. Why are there multiple levels of breakers? I suspect that sub-breakers are intended to ...
10
votes
3answers
12k views

What is electrical code for number of wires in a breaker?

US, Georgia I am adding some new ciruits to add some additional outlets. The closest place is to run a wire to the main panel box. My question is, can I connect more than one wire to a breaker and ...
4
votes
4answers
1k views

Can re-closing a circuit-breaker be dangerous?

I have a circuit breaker that keeps tripping. When i try to reset (close) it, it immediately jumps back to the open position with a noise that sounds a little scary. I have now stopped trying to do ...
9
votes
4answers
11k views

Why does my microwave keep throwing the circuit breaker?

I have a circuit that powers several things in my house: Kitchen microwave Basement lights Basement sockets Sump pump Recently, this circuit has been thrown with alarming frequency when I use the ...
2
votes
2answers
5k views

What is the purpose of a double pole breaker for separate 15A circuits?

My new house is done being built and I am going to come in and install my new gas range and dishwasher, both 120V 15A appliances. I got thoroughly confused looking at the breaker box because gas ...
1
vote
2answers
3k views

Why is my fuse board buzzing when I'm using the shower?

I have used an electric shower for years no problems, but all of a sudden my fuse board started buzzing when I use the shower. I replaced the shower with the same size unit and it still makes a ...
4
votes
1answer
1k views

How can I figure out why my breakers are tripping?

A few years ago, I installed a solid wood "pocket" sliding door for my workshop. It's on an exterior wall, so I had to add some thick sealing strips that keep the cold air from Wisconsin winters ...
2
votes
2answers
2k views

What does the latch position of a circuit breaker mean?

I bought a new home in December 2011. After some time the kitchen lights and the lights in the living room started to switch off randomly. Some days it would happen 3-4 times in a row. Other days it ...
1
vote
0answers
48 views

Multiple AFCI breakers tripping at same time [duplicate]

Possible Duplicate: What could be causing AFCI breaker and GFCI receptacle nuisance tripping? I have a new house. During the last couple of months I will find that multiple breakers will ...
6
votes
2answers
7k views

Blown fuse replaced, still no power

Yesterday a contractor was doing work in our bedroom. At one point he plugged in a hammering drill and when he used it it blew the fuse. We confirmed the 15amp fuse was dead but I didn't have a ...
3
votes
3answers
1k views

How do I determine if adding an air conditioner will overload a circuit?

I'm going to take advantage of some Memorial Day sales and pull the trigger on a portable AC unit for my "basement-ish" (bottom of windowsill is mid chest, rather than head height) apartment. Before ...
4
votes
3answers
16k views

How do I replace a GFCI receptacle in my bathroom?

we're remodeling our bathroom and were simply looking to switch out 20 year old light almond outlets and light switches for white. While I thought this would be easy I've run into a problem with the ...
2
votes
2answers
426 views

How much current should I expect this motor to draw when it's running steadily?

This fan lists its "Max. Amperage" as 3.2. I assume the motor draws that much when it's first turning on, then settles down to some lower current. How much current should I expect it to draw when ...
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
10k views

Splitting a circuit breaker into multiple lines

I recently found out that several rooms in my house are apparently connected to one circuit breaker. Setup: My wife was in the bathroom drying her hair and I decided it was time to nuke lunch in the ...
6
votes
1answer
5k views

GFCI outlet won't come on

I have a couple recently installed (By a professional licensed electrician) GFCI outlets outside a barn, both on their own circuit. Both have water trough heaters plugged into them - 1500 watts each. ...
1
vote
3answers
13k views

What did I do wrong??! Wiring error is tripping circuit breaker

Here's the scoop: There are 3 switches in my hallway. One switch on side A and two switches on side B. Side A switch controls same light as one switch on Side B. I replaced the switch on Side A ...
3
votes
2answers
4k views

What information do I need to select a circuit breaker?

I am having 2 new lines run in my basement to power a workbench's tools and an unrelated computer station. I have room in my panel for additional breakers, and rather than tie into existing wiring, I ...
2
votes
1answer
391 views

How do I recognize which socket cover (fused or 3-pin) connects to which outlet?

I have two power outlets in this room, one is a normal 3-pin (UK) plate cover and the other is a fused (switched) plate cover (much like the one below). I've know removed them and wish to put them ...
0
votes
1answer
8k views

Why has my garbage disposal started tripping the breaker every time?

I have never had a problem with my garbage disposal or that circuit before, however I am now having issues with it. Every time I turn it on, it immediately trips the breaker. I'm not even sure how to ...
7
votes
4answers
6k views

Can I replace an outlet that uses knob and tube wiring with a grounded outlet?

Can I replace an outlet that uses knob and tube wiring with a grounded outlet? Obviously the best choice would be to replace the old wiring. Is there a standard way to ground these outlets? Do I need ...
3
votes
1answer
294 views

Single outlet resettable breaker?

Basically I have an uninterrupted power supply (UPS) which has a 20amp plug and I know that the load on the UPS will NEVER exceed 15 amp (Bought it mainly because it can attach more battery units to ...
3
votes
1answer
2k views

Amp rating of ganged circuit-breakers

Backstory: I'm considering replacing my current tank water heater with a tankless whole-house unit. The units I see generally require a 120-amp breaker circuit. Currently, my panel has two ganged ...
2
votes
1answer
938 views

How do I test circuit breakers?

Suppose I need new circuit breakers and buy some at a local shop. How do I test them to be sure they haven't been damaged on their way from factory and will do their job when time comes?
4
votes
2answers
7k views

low voltage from circuit - bad breaker?

Background: I'm doing some rewiring work in the kitchen. There were three circuits coming into a junction box that controlled the sink disposal, dishwasher, a few receptacles and a light. So I got ...
7
votes
2answers
10k views

Can I install an additional breaker bus bar on my main breaker panel?

I'm adding several new circuits to my main electrical panel as part of a kitchen remodel. The panel with accommodate the new circuit breakers, but it does not appear to have enough neutral and ground ...
7
votes
2answers
1k views

Are there any “easy” ways to trace a home electrical system?

We bought a home a few months ago, and the electrical panel (and subpanel) are completely unlabelled. We have no way, short of flipping breakers, to know what breaker powers which fixtures. Is there a ...
5
votes
2answers
3k views

Why doesn't the main breaker shut off power for house?

Location: California | United States I'm certain I'll need a licensed electrician for this but wanted to get thoughts on what could be going on. I recently noticed that power remains on in my house ...
8
votes
1answer
2k views

Is there an average number of outlets that are wired off of one circuit breaker?

I recently demolished my basement to start a reconstruction/improvement project. My first horror was the electrical layout. I've got hidden junctions, mismatched wire sizes, improper junctions and ...
7
votes
2answers
6k views

How much should it cost to add a circuit breaker?

In this question, I asked about problems between my circuit breaker for a circuit shared by my microwave and sump pump. The conclusion was that another circuit should be added to support the microwave ...