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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3
votes
3answers
135 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
66 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
32 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
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2answers
67 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
72 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 ...
1
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1answer
56 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 a 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
49 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
552 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
71 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
55 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
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1answer
73 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
160 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
49 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
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1answer
43 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
47 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
68 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
45 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
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1answer
23 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
52 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
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1answer
64 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
144 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
75 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
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2answers
129 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
53 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
44 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
114 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
60 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
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2answers
108 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
61 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
votes
1answer
81 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. ...
0
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2answers
72 views

Voltage drop with Microwave

I've begun having problems with the voltage dropping when running the microwave (which is noticeable when the microwave slows down!). This does not happen with other high drawing appliances (washer/...
4
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3answers
336 views

Why is my wiring a fire hazard when we have circuit breakers?

A neighbor in my (US) building just found out that his laundry room (and others in the building including mine) are wired incorrectly. When the original washer and dryer were replaced, the dryer ...
24
votes
7answers
3k views

How can I add an ammeter and/or voltmeter to my home breaker panel?

In my professional life, I work in datacenters and all of our PDUs have ammeter displays on them. Of course they do: we always want to know how many amps a PDU is using. But in my house, nobody has ...
0
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1answer
138 views

Breaker Immediately Trips, Need Help Troubleshooting Why

I installed 4 Lithonia LED recessed lights on my living room 15 amp circuit. Everything was working great yesterday when doing final testing. I left the breaker off overnight as I was planning to do ...
4
votes
3answers
222 views

Microwave door interlock switch keeps failing

I have a 1000W GE "over the range" microwave (model JVM3160RF) that is now about 3 years old. Earlier this year, one of the interlock micro-switches failed (would not depress) which caused the ...
0
votes
1answer
90 views

What kind of electrical shock can that be?

edited to add some details asked for in comments So, there is that house in France with three phase electrical power. I don't know if this is relevant. And I can't tell the whole installation was ...
0
votes
1answer
49 views

Solar AC Disconnect - Fused or UnFused?

I'm installing a solar panel system with microinverters on each panel. An AC disconnect must be installed outside. I've learned that AC disconnects can be fused or unfused. - the unfused variety ...
1
vote
1answer
75 views

Powering a 120v Receptacle off of a 240v Circuit Breaker dedicated to an Appliance

I have a 240 volt 20 amp GFCI circuit breaker powering an outdoor appliance that has 2 electric motors and a motor control unit to synchronize them. I would like to wire a receptacle off of 1 hot leg ...
2
votes
2answers
55 views

AC Disconnect Ampacity - can fuse size be something other than 30 or 60 Amp?

I am currently hunting for an AC disconnect to sit between my main service panel and the AC power that will be supplied by my solar panel microinverters. Nearly every AC Disconnect I find online is ...
2
votes
1answer
85 views

Can/should I replace this 50A breaker with a 15A breaker?

I'm the recent owner of a 27yr old house. I'm looking to find more power for the basement that I'm finishing. There's a 50A circuit going to one of the outdoor AC units - but the info sticker on ...
1
vote
2answers
131 views

Is it dangerous to request more power from a mains circuit than intended?

Is it dangerous to attach devices using more than 3680W in total to a single 16A/230V mains circuit or is all I risk triggering the circuit breaker?
0
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1answer
105 views

Circuit Breaker Trips Immediately

One light switch in a 3 gang box trips the breaker every single time. This switch is for 3 exterior lights. All other switches and outlets on this breaker work fine. We moved into this house about ...
0
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2answers
64 views

Well pump with 15A fuses on a 20A circuit?

I noticed today that my well pump, which is 240V (USA) and is on a 20A dedicated breaker has dual 15A fuses: In 8 years in this house it has never blown a fuse nor the breaker. So I assume 15A is ...
0
votes
0answers
47 views

Replacing DC connection of 0 AWG with two 4 AWG cable

My Inverter is connected to my 300ah 12v battery bank via 0 AWG cables, I want to insert a circuit breaker into the positive connecting cable, I don't want to cut the cable but can I add a section of ...
0
votes
1answer
48 views

RCCB trips and causes sockets to lose power, but lights, etc. don't lose power

Several times in the last month, we have experienced small power surges that cause the circuit breakers to trip. Most of the time this has been the "sockets" circuit breaker, however 15 minutes ago ...