Questions tagged [circuit-breaker]

For questions generally relating to safety devices used to automatically stop the flow of electric current in the event of a fault condition. Use this tag for questions about fuses, too.

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2
votes
2answers
74 views

Is there a compatible breaker fuse?

The house I recently purchased has a fuse box (something I have never had before). I was hoping to use breaker fuses until I am able to get the box upgraded to breakers, however I don't know a lot ...
2
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3answers
90 views

Can I substitute a 100 amp circuit breaker in a 90 amp spot?

My heat pump 90 amp circuit breaker keeps tripping. Heating guy said it is the circuit breaker and it need to be replaced. It is hot to the touch. My local store only has the 100 amp circuit breaker. ...
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1answer
43 views

What are common reasons afci circuits won't work?

I rewired my house and installed 8 GFCI, afci and dual function circuit breakers on my 120 volt circuits. They all trip with any type of load, however standard circuit breakers work fine.
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3answers
81 views

Murray Universal breaker

I have a 50 year old Murray box that will not take the current circuit breakers. I need to find out how to order or find the number for a 4 pole 20/30/30/20 breaker that will fit the old style box or ...
0
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1answer
73 views

20amp breaker keeps tripping

I have a 20 amp type QO GFCI circuit breaker (12 GU wire) that is tripping under load. My home is about 5 years old and the breaker provides power to half of the kitchen outlets and part of the dining ...
2
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5answers
133 views

Reason GFCI breaker popped?

When a GFCI breaker pops, is there a way to tell whether it popped for the GFCI reason or because of excessive current?
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2answers
78 views

Can I put a 20Amp breaker on my existing 15AMP garage circuit?

I bought a dust collector and I am trying to find out if I can run it together with the table saw at the same time on the existing circuit. Not sure what the 2x15 circuits are for (house built during ...
0
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1answer
41 views

My basement kitchen has this circuit (20AMPs or 40AMPS-not sure) , can I run power tools on it?

The breakers of my basement kitchen show like below (the 40 ones). The plug is close top my garage where I might need more power. Since that kitchen is not used, can I use a extender power cord to ...
0
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1answer
51 views

Do I have 40 Amp breakers here?

Most of my breakers are 15A. Where needed I am seeing them paired and then the end of the switch is marked 30. I seem to have a pair of two like in the picture--the switch end shows 40. Does this ...
1
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2answers
51 views

Troubleshooting immediate CAFI Trip

I'm currently building an addition to our house and in the final phase of wiring - installing the switched, receptacles and fixtures. I am running into an issue and was hoping to get some help ...
0
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2answers
100 views

Vacuum blows Breaker

My Meile vacuum has all of a sudden started blowing circuit breakers. It does not matter what outlet in the house I plug my vac into the breaker blows. When I plug the vac in there is usually a ...
0
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1answer
34 views

Selection of Breaking Capacity in Circuit Breakers

Modular Circuit Breakers such as this DX3 Legrand MCB (ref.) are rated with a: Nominal Rating: 3x63A, Operational Curve: C, Breaking Capacity: 6kA 400VAC (IEC 60898-1) | 10kA 400VAC (IEC 60947-2), ...
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1answer
64 views

Tandem/twin circuit breakers installed where not allowed?

I decided to read the panel's diagram today and IF I understand it correctly, you can only use tandem/twin breakers in designated slots. Referring to the diagram, it looks to me like circuits 11-17 ...
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3answers
91 views

Breaker Trips when turning on saw

I do wood working in my garage. I have two saws a miter saw and a table saw. About 1 in 10 times when I start either of the saws the circuit breaker will immediately trip. Nothing else is running ...
4
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2answers
736 views

Upgrading garage fuse box to breaker box using existing 10/2 wire with ground

The sub-panel in my detached-garage is a 4-fuse box that is supplied by two 10/2 cables with ground. The 10/2 feed cables are routed through underground plastic conduit. Each 10awg feeder hot wire ...
3
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3answers
231 views

How to add a main shutoff breaker to sub panel

I have a 50 amp service line that I'm running to a sub-panel in my outdoor workshop. Rather than plug the service line directly to the buses on the sub-panel, I'd like to add a 50 amp breaker first. ...
1
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3answers
76 views

What type of fuse should I use for my GFCI kitchen receptacle?

I have a countertop 15 amp GFCI receptacle in my kitchen and I would like to replace the fuse for it. It's currently on a time-delay 30 amp fuse (it's a cartridge/capsule style fuse), which is too ...
3
votes
1answer
36 views

Installing a new electrical panel in RV [duplicate]

I just purchased this breaker box from Home Depot. I'll be installing it in my RV. Current will be supplied by a 12VDC to 120VAC, 3000W inverter. I'll be using Single-Pole Type BR breakers. Here's ...
0
votes
2answers
73 views

Understanding my electrical panel

I just purchased this breaker box from Home Depot. I'll be installing it in my RV. Current will be supplied by a 12VDC to 120VAC, 3000W inverter. I'll be using Single-Pole Type BR breakers. Here's ...
2
votes
2answers
78 views

HOT prongs on 30A 240V electric dryer socket (10-30R Socket)

I have an electric dryer (Samsung DV42H5000EW) and it is connected to a 30A (I believe it dual 30A as there are 2 arms that are connected to each other both saying 30A) 240V breaker. The wall socket ...
2
votes
1answer
122 views

12/2 connected to 8/3 wire with extra wires taped off. Is this legal?

We just got into a house and I believe the electrical is a mess. House is approximately 40 years old. We found an 8/3 buried wire that runs to a detached shop/shed and about 10 feet from the shed it ...
0
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1answer
56 views

Overhead lights don't work but voltage meter shows sockets have power

Overhead lights don't go on but voltage tester shows voltage is reaching sockets. Even when switch is turned off, meter shows voltage still reaching sockets. Receptacles on the same circuit also ...
8
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2answers
564 views

Did electrician connect this service entrance box wrong?

I recently had solar PV installed. The electrician replaced my service entrance box. Power is fed to an indoor subpanel through a 100A breaker, mounted directly above the service disconnect breakers....
2
votes
1answer
78 views

safely de-energizing a junction box so that I can permanently cover it up

I have a junction box in my ceiling that is controlled by a single light switch. I no longer want to use the junction box or have it exposed and I'd like to cover with drywall-- much preferable to a ...
7
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4answers
1k views

How to use a 100 amp sub panel for a 50 amp input

I'm building a shed I want to add power to. To get power I'm planning to use the power that is going to my hot tub (50 amp). The hot tub has a 50 amp breaker from the main to a 50 amp breaker box ...
0
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1answer
57 views

I have building that is on a 20 amp breaker along with outside lighting

I bought my house almost two years ago and there is a building off to the side that is on the same circuit as an older security light on the side of my house and the breaker is a 20 amp, the breaker ...
0
votes
1answer
75 views

Breaker trips when light is switched on in one room

I have and older home built in the early 60s. All rooms were wired with switch operated outlets. I installed a ceiling fan in a room yesterday and the following is now happening. When the switch is ...
0
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2answers
162 views

How to Deactivate Baseboard Heaters on Active Circuit

My home has a circuit for several electric baseboard heaters. I removed two of the baseboard heaters because I got a new gas stove for heating. I also removed the thermostat connected to these ...
0
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1answer
51 views

How to figure out if regulation allows imported fuses that are higher quality than what is legally required, but is not readily accessible?

I live in Hong Kong and they kind of adopted British electrical standards. I said "kind of" because they only use Class C (Commercial) MCB; Class B cannot be bought locally. I asked around and they ...
2
votes
1answer
60 views

On a QO breaker, how do I distinguish GFCI from overcurrent trip?

I have a 1-pole Square D "QO" type 1-pole, 20A GFCI breaker (not AFCI). Plugged into it are: Twenty-five CFL lights averaging ~15W each, so 375W nominal A 1500W-nominal heater-fan, though, I ...
1
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2answers
48 views

AFCI Breaker tripping

hoping to pick your brain about some electrical issue I'm having. The outlets in 3 of my rooms stopped working - the AFCI breaker (15 a) for that circuit is tripping and won't reset. The lights are on ...
0
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4answers
81 views

Breaker tripped under no load?

Came home tonight and found my hall light didn't work when I flipped the switch. Went to the panel and found the breaker had tripped. The only things on this circuit that I know of, based on what ...
0
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3answers
48 views

circuit breaker that trips when there is a loss of power

Is there such an animal that would trip a circuit breaker when there is a loss of input power? Similarly with the relay system which energized to close the main contact to apply main/grid power to ...
0
votes
1answer
27 views

Split sub-panel box with dual feeds? [duplicate]

Is this a thing? Kinda goes with my first question on here. Again i am not an electrician nor will i be doing the work. I am the builder and owner. In the designing stages of a tiny house on wheels ...
9
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6answers
5k views

Using a heater and toaster oven trips the breaker. Can an electrician fix this?

Using a heater and a toaster oven together, both about 1500w each, trips the breaker. It seems both are on the same circuit. Moving either appliance to a different location is not really an option. ...
1
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2answers
54 views

Breaker Breaker, Which should I use?

I have setup a new water heater where I used 10-2 wire to a disconnect box. Then, connected a square D 30 Amp dbl pole in my breaker box. Water heater connections were black to black white to red and ...
1
vote
1answer
65 views

Power goes out intermittently but no tripped breakers or GFCI

Recently I have experienced power outages in several circuits. These are all outlets that serve my kitchen and living area. After some time, the power will eventually come back up. There are two GFCI ...
4
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3answers
147 views

Can you tell me what the code is around electrical boxes in homes with a basement?

I am trying to sell my house and the following item was called out as a Safety Hazard that I must correct to sell. I live in Indiana, can someone explain the code, what is wrong here and what a ...
1
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2answers
78 views

Garage Sub-Panel Addition

I want to add electric heat to my 750 square foot garage by way of an overhead 7.5 or 10 KW heater. Adding a sub panel would allow me other options for power for the following: Heater 220V at either ...
19
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6answers
2k views

How can I calculate my anticipated peak current load?

Preamble This question takes place in Japan. In Japan, domestic electrical service is metered, but there is also a monthly fee that increases with larger service capacity. Units are wired for (...
1
vote
2answers
139 views

Electrical circuit with too many lights and receptacles on it

Recently during a storm a circuit breaker switched off half of our home's lights and sockets. Thinking it was due to moisture we waited for the house to dry and then reset the breaker. It would stay ...
0
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0answers
55 views

2 seconds of darkness

I got a 240 plug in room a, running 4 1000 watt lights. I got a table lamp in a 110 in room b When the 240 kicks on in room a, the light i have pluged into the 110 goes off for a second or 2 in ...
0
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1answer
45 views

Load Balance Electric Main Panel

Circuit breakers have to be attached to both sides of the electric panel in such a way that it balances the load. I would like to know if: I should ensure left circuit breakers Amp is almost same as ...
13
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1answer
4k views

Why are adjacent breakers for unrelated circuits ganged?

I'm looking at electric panels in some newer residences and seeing something confusing: Circuit breakers that are adjacent to each other, but that cover unrelated circuits, are ganged, as shown below. ...
1
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3answers
118 views

capacity of my electric panel

I see a 100 Amp breaker in the mains, which means my electric panel is 100 Amps. I see may arrays of circuit breakers on it, as many as 18. When I add the total amps on them, it adds upto 375 Amps. ...
0
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1answer
43 views

when I turn off the breaker, light goes out but I still see some voltage with my voltage checker

there are two switches in the box. One goes to an inside light the other goes to an outside light. i turn off the breaker and both lights go out. when I check with my voltage checker, I don't see ...
1
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2answers
67 views

How to compute breaker size for electric Stove + Oven?

I currently have electric appliance, and I want to replace them with newer units. These are the ratings of newer units I am considering: Induction Stove VICU53616BST - Maximum Amp Usage 240V - 48....
2
votes
2answers
109 views

Options for Running High End Computer on Old Circuit

I'm preparing to build the computer of my dreams. Unfortunately, it's going to top out at 1350 Watts when running at peak performance. I live in an 80 year old bungalow and the power situation is less ...
1
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1answer
63 views

My 100 amp box/panel seems to have lost the third leg

One leg reads 120 and the other power reads 16volts while the neutral reads zero. I'm not sure what the problem is.
2
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1answer
83 views

Unlinking outlet from the switch

I have a dimmer switch which is also controlling the outlet. Now when I dim the light and something is plugged in the outlet my ceiling lights start flickering. I want to make my outlet always hot. ...

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