For questions generally relating to safety devices used to automatically stop the flow of electric current in the event of a fault condition.

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2answers
194 views

How Do I Connect 00 AWG Wire to a 100A breaker?

I'm hooking a 100A service panel to my meter pan. There is the 100A disconnect panel on the right side that feeds the little house, I'm installing another panel on the left side to service my barn, an ...
2
votes
2answers
302 views

Why does a GFCI breaker trip when another breaker is accessed?

I just bought a new house, and on the first day there realized a breaker was tripping. It is one of only two GFCI breakers in the box. It's 20 amp with a bedroom/bathroom on it. I tested every outlet ...
5
votes
4answers
15k views

Why does my circuit breaker trip with any small load, even after replacing the breaker?

I have a 20A 240V GFCI breaker in my main breaker box going to a conduit to another breaker box outside. All worked well last summer. Now, when I put any load (weed-eater, light, etc.) on an outlet ...
1
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1answer
54 views

HVAC tripping breaker - things to check before replacing?

HVAC system (we're in Houston, it's still hot here) stopped working Tuesday. A/C guy came out, determined it was tripping breaker. Would trip immediately after resetting, but after a couple of ...
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2answers
123 views

Do I need a breaker in main pannel for sub pannel?

I have no breaker space in the main 200amp panel. I'd like to set a 100 amp sub panel with its own breaker. Can I connect the sub panel to the main entry lugs on the 200 amp panel?
1
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1answer
68 views

Is there any advantage of one of these types of switches over the other?

Shown in the photos below are two different 2-pole breaker switches in my circuit box. In order to turn the 15 amp switch on and off it must be pushed along a longer section of the breaker than the 20 ...
0
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2answers
520 views

Electrician Terminology “FAU”

I've noticed these letters several times written on the circuit breaker panel door. Does someone know what F.A.U. stands for in this context?
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1answer
1k views

How many ceiling fans and switches can I put on one breaker [duplicate]

I have a person that wants to wire in four light boxes and four ceiling fans with switches and I need to know if I can run all four of them safely from one breaker and if so what kind of breaker? This ...
7
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2answers
9k 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 ...
2
votes
1answer
210 views

How can I determine the rating of an unmarked dual-pole circuit breaker?

I would like to install a new electric cooktop. The panel has a dual-pole breaker serving the current electric cooktop but there is NO marking on the breaker to indicate the rating. The new cooktop ...
1
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1answer
81 views

What areas of a home are required to be AFCI protected?

I've got a Crouse Hinds panel with the majority of the breakers being of the ridiculous side connecting type. The panel and breakers are old and beginning to arc due to the lose connection. I've found ...
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0answers
94 views

I am having problems with my circuit breakers. can you help?

When I shut one breaker off all the power shuts off to 5 other breakers. What could that be?
2
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1answer
249 views

How can I replace circuit breakers with GFCI breakers when it is a multiwire branch circuit?

We have 2 carriage lights on our patio and 3 flood lights on our eves. The carriage lights are controlled by two 3-way switches and the yard lights are controlled by another set of two 3-way light ...
2
votes
2answers
125 views

Connecting 2 GFCI Breakers to 2 Hot Leads and 1 Common

So I just bought my first house and in lieu of changing loads of outlets in the kitchen for GFCI outlets I went with two 20A GFCI breakers. Upon going to install the breakers I found that the cable ...
0
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0answers
78 views

wiring my mobile home breaker panel

Someone had broke in and stole my 200 amp breaker panel by cutting the wires how do i know what the wires go to after entering the ceiling also there is no writing on these wires to tell me what gauge ...
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3answers
97 views

Circuit Breaker change

I am changing a Federal Pacific Electric Co. Circuit Breaker double 40amps but I can't find one. Can I use a double 50? It's for a wall oven?
1
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1answer
69 views

Circuit Breaker installation

Why is it so difficult to put a circuit breaker in? I push the plastic part in but the steel contact does not go in. I broke a single 20 amp...any tricks?
6
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3answers
4k views

How do I run a 3 Phase/1hp TEFC motor off of a regular household outlet?

I recently bought a brand new TECO-Westinghouse Electric motor . 3 phase HP: 1 Volts : 208-230/460 RPM: 1750 HZ: 60 Fr: 56 Cat no: ZA.0014TE2/56 Type : AEFAZA Enclosure : TEFC I would like to run ...
0
votes
1answer
138 views

No voltage from breaker even though breaker is good

I’ve searched the forums quite a bit and can’t find any other question like this one. I recently moved into a new house and needed to remove a light fixture from a wall in a bathroom. So I needed to ...
2
votes
2answers
1k views

Any reason not to leave unused breaker in the panel?

My main panel has a couple unused slots, but the metal tab covering those slots has already been removed. One of those slots has an unused breaker, the other one used to have a plastic filler panel, ...
0
votes
0answers
69 views

Breaker for compressor tripping when a/c reaching stage 2

My breaker for the compressor is tripping when my a/c is switching to stage2 in very hot weather. Is there anyone who can give me the steps to troubleshoot this issue?
-1
votes
1answer
187 views

installing sub panel in detached guest house running three 60 amp breakers for appliances

so im installing a sub panel to detached guest house approximately 50' from the main panel. running all electric appliances electric range,electric tankless water heater, and a/c unit. all three of ...
2
votes
2answers
128 views

I have phantom electricity

I have three outlets in a room that are not on the same circuit as the rest of the outlets in two rooms. I have most of the circuits in the house mapped and identified on two breaker panels. The ...
0
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1answer
270 views

What could be causing our air conditioner circuit breaker to keep tripping?

Our air conditioner circuit breaker marked "AC", is tripping frequently after the AC unit works for a while. Sometimes as long as an hour or more and, sometimes as short as few minutes. We were told ...
2
votes
4answers
19k views

Why does the circuit breaker for my bedroom continue to trip without any visible event after a power loss?

The 20A breaker for my bedroom will trip whenever we have a power outage at my house. If you reset it, it will trip again after an interval, say 5~10 seconds. The longer you wait to reset it, the ...
1
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2answers
113 views

Light sconces tripping circuit breaker

I recently installed two sconces in our kitchen to replace some old halogen lights with LED bulbs. The boxes had three (?!) White wires twisted together, two black wires twisted, and one red. I ...
0
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0answers
58 views

Can I install a 150A breaker if the the outdoor MCCB is 100 A?

I have a villa, which is 375m2. On the boundary wall of the villa I have a molded case circuit breaker (MCCB) rated for 100A. I need to install a main distribution panel (MDP) inside the villa. The ...
3
votes
2answers
180 views

How to track down a short circuit in attic with pressed metal ceiling?

When switching on a light the circuit breaker tripped. On the distribution board, I switched off the sub-circuit for the light. The rest of the house and the plugs in the room with the light still ...
2
votes
1answer
1k views

Replacing 10 amp breaker for 20 amp

I'll try to keep this short but there is a bit of background info that may be needed. Couple of days I rented a floor grinder to eliminate uneven concrete floor in the basement. The grinder kept ...
3
votes
3answers
434 views

Lighting circuit trips breaker every time

I have a lighting circuit in my home like so: Every time I turn on the switch, the breaker trips. This circuit has existed for over four years and only now has the problem begun. I've checked all ...
6
votes
3answers
7k views

What is the difference between Square D and QP single pole circuit breakers, and can they be mixed?

I just noticed that all of the branches from my upstairs service box are run off of 15 or 20-amp type QP circuit breakers, except for one 15-amp line that is for the hard-wired smoke alarms- it uses a ...
1
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2answers
243 views

Can having a bad grounding situation destroy a circuit breaker?

We moved into a home, built a while ago. there are wires hanging and covered in black tape on a chimney. I bought 2 sconces and put them in place. i did not hook up the ground wire on one of them, ...
0
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2answers
3k views

Outlet causes breaker/fuse to trip but why

Been living in my house for 9 years. I've got a certain outlet in my master bedroom that just started doing something strange. Let's say I have a light on in my master bedroom...and I try to plug in ...
0
votes
1answer
344 views

internal fuse on air handler blows every time it shuts off

air handler for air conditioner has worked fine since I moved into the house but this year both times the air conditioner has turned on it has not restarted. Both times so far the problem has been ...
1
vote
1answer
921 views

Is it safe to pull a continuous 18 amps from a 15 amp outlet?

I have a heater that draws a continuous 18 amps and has a 20 amp plug. I created an extension cord to plug into the wall, however on one end it's a 20 amp receptacle - heater plugged into extension ...
2
votes
1answer
326 views

Is it possible to fry a lamp's internal wiring if I put the wrong bulb in?

I went to the hardware store pulled a bunch of LED bulbs off the shelf. One of the bulbs found its way into the wrong box and had a significantly smaller screw base than your typical light bulb base. ...
3
votes
3answers
555 views

Is it possible that I could have a 240V circuit with no circuit breaker?

Is it possible to put in an electrical circuit without any way to interrupt the circuit? I tried to work on a 240V outlet, and it wasn't marked in the breaker box. I threw every breaker, and that ...
7
votes
3answers
3k views

Is it ever safe to have 14 gauge wire anywhere on a circuit protected by a 30 amp breaker?

I was doing some work in an old house I recently moved into, and found that my dishwasher and garbage disposal (and some outlets near them) are on a 30 amp breaker. However, some of the electrical ...
0
votes
2answers
116 views

Circuit breaker + panel selection — make and breaker series?

Is there a compelling reason to choose one type/brand of breaker & panel (Eaton CH, Eaton BR, Square-D QO, Square-D HOM, Siemens, GE) over another when putting a new electrical panel and breakers ...
20
votes
4answers
4k views

Why would two circuit breakers be connected inside the service panel?

I was trying to locate the circuit breaker for an outlet in my garage and found a truly baffling setup. Two breakers control the same outlet (both plugs). After some head scratching, I opened the ...
1
vote
1answer
1k 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 ...
2
votes
1answer
624 views

Why does half the house go out when a single breaker trips?

The breaker box at my brother's house is well marked and balanced except when a breaker is tripped half the house goes out. I'm currently living on the third floor of his house. When I turned on a ...
0
votes
3answers
2k views

Why are the lights flickering when the a/c is on?

The lights flick on and off when the a/c is on and the sound of a/c is too noisy and look like it's going to blow. I already checked the connection if they have a short circuit. Did not found any ...
2
votes
2answers
449 views

Do I have to run new wire when replacing my electric oven?

I bought a new single electric wall oven to replace an old one in an old house. It says it requires 20 amp and 240 volts. The old one was running on a 10 amp breaker. The wire from the breaker to oven ...
4
votes
3answers
358 views

My breaker panel is in a sump closet, should I move it?

I just purchased a new home and I'm going to replace the breaker panel (it's full and I want expansion room). The panel is located directly above the sump pump in a small closet in the corner of the ...
1
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1answer
60 views

Identify fuse that is off/bad but not tripped

I have a set of outlets and an overhead light in the garage that are not powered. I believe I know the fuse they are under via simple labels and from some process of elimination. The fuse is not ...
1
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3answers
1k views

2 15 amp breakers to 1 30 amp

I have a wired garage that has 3 wire 10 gauge going in to it. In the panel this wire is hooked up to 2 individual 15 amp breakers. I want to know if i can put in a 30 amp breaker in that spot. The ...
10
votes
1answer
86k views

Why is my air conditioner tripping the circuit breaker?

Our air conditioner recently stopped blowing out cold air. When I went to check on it, I noticed that the outside unit wasn't coming on. We had had problems with ants in the contacter in the past, ...
1
vote
1answer
121 views

Is my breaker box aluminum compatible?

I have been advise to convert old aluminum branch wiring with AlumiConn connectors and maybe also in the breaker box, unless the circuit breaker is AL & CO compatible. How do I determine this? Can ...
2
votes
1answer
1k views

15 amp load trips 20 amp breaker instantanously

New construction wired by professional electrician, Montana USA. Dedicated circuit for a 14" chop saw with 10 ga. wire and a 20 amp breaker. Saw was used previously on a 15 amp circuit with no ...