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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My ceiling fan/light and my closet light in my master bedroom quit working but all the other lights/outlets work that are connected to that breaker

My ceiling light/fan in my master bedroom and master closet light quit working (both powered by separate light switches), but the rest of the outlets/lights work that are connected to the same breaker ...
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1 answer
69 views

Different vintages breakers in main panel

I'm considering purchasing a house and I took a look at the electrical panel. The house was built in 1979 and at some point they added a sub-panel. The breakers in the original panel look like a ...
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4 votes
2 answers
516 views

Safe breakout for an RV outlet

I have an existing 120V 30A outlet used for an RV. I would like to make myself a breakout box to use this outlet as a bunch of regular outlets when I have the need for outdoor use. The outlet is wired ...
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5 votes
2 answers
91 views

Main breaker not tripping

We just connected the power company's meter to our new construction and got an immediate humming sound which the meter technician said should not happen. We later found that one of our electrical ...
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1 answer
75 views

why does the Breaker trip randomly with no load

I have A 15 amp beaker at the panel that randomly trips. The breaker controls the line to the detached garage, where it runs to a two 15 amp fuse box. The wiring is underground rated burial cable. The ...
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Breaker tripping for circuit when turning on any switch

I’ve been suddenly having an issue on one of the circuits in my home. When I flip any light or fan switch, it immediately trips the breaker. I have changed the fan/light in one bedroom and a light in ...
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10 votes
4 answers
566 views

Challenger Panel: Are there any issues with the breakers we are using?

After reading this question and how much of uproar it caused. These are the breakers we are using with our challenger smb20(20-40)SN panel, apparently they are not all the same. 40 Amp x1 - Pool Panel ...
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47 views

Circuit breaker compatibility

I have a T&B 200 amp panel TBB20 and I need to add a 50 amp 240 volt GFCI circuit for an EV charger. Code requires that the circuit be GFCI. What 50amp 240volt circuit breaker is classified or ...
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no 240 across breaker but 120 separately but dead one side I house

I checked the main breaker out at the meter it reads 240 coming out of the meter from leg to leg and 120 to neutral to hub on each side. coming out of the of the disconnect breaker I read 120 on each ...
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1 answer
39 views

GFCI Test Trips Arc Fault Breaker

Never seen this one before. GFCI receptacle test and reset buttons work normally. However, when a tester is used, the breaker trips instead of the receptacle. The same thing happens on other ...
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23 views

How to wire multiple 12w pot lights w/boxes & wall switches onto a single 20 amp circuit?

Hello I have a RV using a 30 amp distribution panel/system. I want to install 5 120V prepackaged pot lights with receptacle boxes. and wire in 5 light switches. I am a novice electrician and I'm not ...
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-1 votes
1 answer
108 views

Not getting 240 volts out of stove plug getting 120 out of each side but not 240 when testing live

I just brought a mobile home. The electric stove was not working so I tested it. At the plug I got 120 when testing each live with neutral but when I test the 2 live I got nothing. Brought a new 50 ...
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-1 votes
1 answer
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How do I troubleshoot lost voltage in a previously working connection? [duplicate]

I have a garbage disposal that was direct connected to a 15A breaker and working fine. I needed to share that line with a new dishwasher install so I tried to install an outlet. I disconnected the ...
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5 votes
1 answer
315 views

GFCI breaker to use in an old Challenger panel with Type C breakers

I am trying to determine what GFCI breaker to use for a 20A MWBC in an old Challenger panel that requires Eaton Cutler-Hammer BR breaker replacements. I have found at least three models that appear to ...
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2 votes
2 answers
54 views

Should an older Knob and Tube rubber-coated 14-gauge conductor be protected with a 15-amp breaker, or a 12-amp fuse?

Recently I found an article saying all Knob and Tube circuits need to be protected with a 15-amp breaker or fuse. I know the modern small conductor wiring rule (NEC 240.4(D)) limits 14 AWG to 15A for ...
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3 answers
171 views

Plan for a safe utilization of a dryer outlet

In my house there is a dryer outlet that, even though inconvenient to me (my dryer is 120V), I don't want to eliminate for house reselling reasons. As it was until now a 3 prong outlet, I have been ...
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2 votes
1 answer
339 views

Interaction between a circuit breaker and a switch

This is a very basic question which I'm sure has already been asked and has a simple answer, but I was unable to get a satisfying straightforward explanation via an internet search. Suppose I have a ...
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Should the breaker for a shed circuit be in the panel or in the shed?

I want to run 15amp electric service to a shed by my pond from a nearby sub-panel. My question is do I install the shed's 15amp circuit breaker at the sub-panel (with a disconnect switch at the shed?)...
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2 answers
121 views

What type of curcuit breaker is this?

Anyone know what type of breaker this is? No description. Single pole 20 amp. House built in 70s.
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2 answers
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Subpanel main circuit breaker trip but not the smaller branch circuit breakers

I have a problem with my 100 amp sub panel in my garage. I'm using only one 40 amp branch circuit to power a service unit to charge my Nissan Leaf. The service unit is connected to the 40 amp breaker ...
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1 vote
0 answers
48 views

Open Neutral, circuit not connected at the panel and too may receptacles on one circuit

Beginner here, I am trying to figure out as much as I can before I call in an electrician. I have a receptacle in my breakfast area showing open neutral. I turned off the power and checked all other ...
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1 answer
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GFCI Circuit Breaker tripping

Just installed a “used” Gfci circuit breaker on my panel. New CB’s not made for this older panel. Without a load wire even attached, CB will not hold and instantly trips when power is applied. Pig ...
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12 votes
4 answers
4k views

I turned a breaker off, and now the security alarm system won’t stop beeping

I turned off a breaker for about an hour. I then heard a low beeping noise, not the full-blown alarm siren. I turned the breaker back on, but the beeping persisted. We called the alarm company. They ...
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-1 votes
1 answer
76 views

Bosch Induction Stove/Oven slide in tripping 50amp GFCI

Bosch Induction Stove/Oven slide in tripping 50amp GFCI The induction stove top slide in range is tripping a 50amp GFCI about once a week. trips while "off" no load except standby ...
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2 answers
56 views

50 amp GFCI to Plug-On-Neutral subpanel?

I'm adding a subpanel that will include service for a hot tub. The panel I have selected happens to be a Square D Homeline 125 amp 8-space 16-circuit PON. I'll be using a Square D Homeline 50 amp GFCI ...
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2 answers
110 views

Coffee maker tripping safety relay

I have a ~20 year old BOSCH TKA8011 coffee maker. (Of the filter coffee kind.) It is fairly simple: it has an on/off push-button, a decalcify push-button, and a low-water-level indicator which ...
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0 votes
0 answers
108 views

Flipped a circuit breaker, now my microwave is dead

I recently moved into a condo with a GE JVM1860SF001 microwave oven installed above the range. The unit is from 2003, so well past its rated life, although it also looks like it was largely unused (...
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0 votes
2 answers
162 views

Installing Nema 14-50R Outlet In Garage

Our garage has a panel but no main breaker, instead what would be the "main" is a 60 amp breaker in the basement panel. If I want to install a 50 or 60 amp breaker on the garage panel, would ...
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14 votes
3 answers
2k views

Do I need to replace my electric panel to eliminate tandem breakers?

I am looking into installing an electric car charger. I called a few electricians to get a quote. My main panel is full, but there is an existing 50 amp breaker for an electric cooking range which is ...
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1 answer
86 views

Wall outlet cable seems to have suddenly lost power

I'm so confused. I have an outlet in my basement, whose power cable I can trace directly to my fuse box. There are no other outlets on this cable. It was working fine but I needed GFCI outlets, so I ...
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0 votes
1 answer
45 views

GFCI Breaker de-energizing itself but not tripping, at random times re-energized

We have a two-pole 15amp GFCI breaker in the breaker panel. It feeds the AC (summer), the furnace (winter), two room outlets and the lightning in three rooms. At random times we loose power in some of ...
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0 votes
0 answers
67 views

Flickering lights after dead short

Very specific scenario I'm trying to troubleshoot. I was installing a new smart switch with the breaker off. I finished the install and went to turn on the breaker. When I did, I heard a POP, though ...
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1 vote
1 answer
89 views

Pressure washer tripping breaker

I have a 120V/15A pressure washer that's tripping the breaker and its own built-in-to-the-cord GFCI under certain conditions. All of the available outdoor receptacles are on a single 15A circuit, ...
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1 vote
1 answer
96 views

20A circuit breaker trips intermittently

About two to three weeks ago, my circuit breaker that controls my outdoor outlets and lighting began to trip. Also on this breaker is my ring doorbell which is how I discovered I had an issue with ...
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7 votes
5 answers
1k views

Is short-circuiting a good way to test if a breaker is safe?

I am looking at the electrics in a house that a friend just bought, and it has one of the problematic "Stablok" Federal Pacific panels. Watching this video, made by a supposed master ...
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3 votes
2 answers
249 views

White and back to tandem breaker. Is this correct?

I opened up a sub panel to find the breaker wired with a 14/2 neutral going to tandem breaker. Is this correct? Why would they have wired the circuit this way?
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0 votes
1 answer
58 views

Water heater tripping washing machine breaker

I just underwent a major renovation and now when my water heater is maxed out, it trips the washing machine breaker on its own dedicated circuit. I upgraded to 400A service with one of the 200A panels ...
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0 votes
3 answers
118 views

Resistive load, EV charger, circuit breaker sizing

Is an EV charger a resistive load? If not, what kind of load is it? The question behind the question is how to size a circuit breaker for an EV charger circuit. I've reviewed various sources, and it ...
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1 vote
1 answer
55 views

selectivity of domestic mini circuit breakers

I have some experience on selectivity in maritime systems. However now, I'm having some issues at home. In the breaker box there is an incoming supply with a mini circuit breaker rated C25. Then there ...
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2 votes
1 answer
77 views

How are "R handles" different from the rest in a Square D QO panel?

I have an older Square D QO 200 amp load center which looks to be from the early 1980s based off the green sticker. I noticed closer to the bottom of the panel that the breaker spots are listed as “R ...
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3 votes
4 answers
741 views

Out of space on Siemens breaker panel - Is it possible to consolidate 4 Siemens QP Type 15 amp breakers?

I need to install a 50 amp breaker for an EV charger in my fuse box. The problem is that the box is already full. I was wondering if I could replace 4 QP type 15 amp breakers with 1 quadplex breaker, ...
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1 vote
0 answers
65 views

Replacing 20A MWBC breakers with 15A

I recently moved into a house and had a home inspection, where the inspector noted that the motor powering a jet hot tub in the basement must be on a GFCI (it was not). When trying to figure out which ...
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11 votes
1 answer
499 views

Attic unit (heater blower) connector glowing hot

I noticed a burning plastic smell coming from my 15-year-old AC unit pictured below (this is in the attic, the heater/blower unit, the type that has heating strips). What causes this? Why the circuit ...
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  • 561
8 votes
1 answer
1k views

What should I do if new breaker buzzes like the old one?

Power went out in two of our bedrooms. Went to the box and found that that breaker was buzzing when turned on (but no power to rooms). So, I replaced the breaker with an identical one, but it still ...
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0 votes
2 answers
161 views

Do I need a breaker box in my shed?

I just finished building a new house and I want to run a 10-2 UF-B 120’ to my shed from my main panel on the outside of the house that has a sub panel for the well and a generator. I plan on ...
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0 votes
2 answers
88 views

Troubleshooting possibly bad GFCI circuit breaker or bad wiring

I have a GFCI circuit breaker in our house (120 V, US) that tripped and would not reset, and I'm trying to investigate if the breaker is bad, or if there is a short somewhere in what it controls/...
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0 votes
2 answers
42 views

Wiring and other questions about installing a heater in workshop

I picked up a small construction heater (240v, 4800W) from a garage sale that I’m intending use as a heater in small work area within my garage. Some of the details: The garage/work area are not ...
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3 votes
1 answer
154 views

Installing an AFCI circuit breaker - any easy way to find a hot wire's corresponding neutral wire?

I'm trying to replace a regular 20A circuit breaker with an AFCI circuit breaker. I understand an AFCI circuit breaker requires both hot and neutral wires. I assume I need to connect the hot and ...
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0 votes
0 answers
43 views

What size breaker will I need for my workshop subpanel, wire, and electrical conduit to feed it through?

Adding a subpanel to my workshop, it's less than 20' away, it's for 2 (240V Plugs), 5(120 V Plugs), and a couple of LED fixtures, nothing more.
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0 votes
1 answer
43 views

Can I Split subpanel from two different feeds

I'm curious how to make this work in a pinch as I'm having to update my business wiring in 3 months for renovation.It'll eventually be a larger amp panel or two seperate panels Current I have a small ...
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