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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1
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2answers
311 views

Breaker lets more Amps then its max

The last few day's I had the main breaker triped a few times, I checked the amps with a multimeter and when the central air conditioner turns on it draws 150! amps for 1 second and then goes down to ...
3
votes
4answers
2k views

How to predict when the electrical infrastructure on my 1950s rental is going throw a breaker?

I live in an old house; it has old electrical infrastructure. Last night it was really hot, and we were running an external dishwasher on the same circuit as the TV and a fan and a ceiling fan. Only ...
0
votes
3answers
54 views

What breaker configuration should I use for a 240v shed circuit?

A friend wants 240 and 120 in his shed. The beaker panel is in the garage about 40 feet away. It was suggested to run 4 individual wires--two for the 240 and one for ground and one for neutral. What ...
0
votes
0answers
25 views

Random Outages on only 5 of my breakers. Open/ Bad Neutral?

Every morning when dawn comes around (5:30 - 6:30 am) the power on 5 breakers in my house seem to kick on and off with power. The breakers are my water heater (electrical/ no gas), my a/c, my kitchen ...
0
votes
2answers
57 views

GFCI breaker has no power?

When I place GFCI breaker into panel and turn the power on, there is no power that I can measure on the hot leg. I measure it between white wire (neutral) and the hot leg. Yes, the pigtail white wire ...
3
votes
1answer
289 views

Is a warm breaker normal?

I have 2 15 Amp breakers both of them with a load of about 12Amps and they are warm. Is this normal that such a load should warm up the breaker?
2
votes
2answers
55 views

Difference between $50 and $175 breaker

I have a Zinsko outdoor panel with a 100 amp breaker for the garage and 125 amp breaker for the cottage. The breakers are bad, so checked into replacing them. It seems a Zinco or Connecticut electric ...
0
votes
3answers
69 views

4A circuit breaker for a refrigerator?

I live in Pakistan and we have no electric panel or separate wires for different devices. I am going to rewire my house but before that I wanted to secure the refrigerator wire. I've been reading ...
2
votes
2answers
24 views

Multi-circuit transients without breaker trip

I have had some transient problems with the circuits in my house. About half of my circuits to several locations have a tendency to cause lights in the affected circuits (yes multiple circuits) to go ...
0
votes
1answer
31 views

Replacing a Challenger breaker with an after-market breaker

I have a Challenger panel board and one of my breakers is no good. When I went to buy a new one they don't carry them anymore. They said they only carry the after-market ones. So I got that one, but ...
1
vote
2answers
108 views

Wire a 30A/15A/30A fuse box to a 4 wire 120V/240V oven

This is for a Canadian Oven being installed in Canada. Used oven came with this box. The manual is not available. The incoming line from both oven and junction are Red/White/Black/Ground. I ...
3
votes
2answers
43 views

How should I add an AFCI to this panel?

I'd like to add an AFCI to the middle circuit here. But that circuit shares a tandem breaker with the circuit above it, so I don't know if there are any subtleties of this setup that I don't ...
0
votes
2answers
29 views

One specific coil on stove trips circuit breaker

I recently purchased a home with appliances included. One of the appliances is an stove/oven. We cleaned the range before our first use. The day after the clean, we used the oven and 3 of the 4 ...
1
vote
2answers
80 views

Using a 100A main breaker in a 200A panel

So I purchased a 200A Siemens panel to replace the old 100A sub panel in my house. The main panel is in the garage and is also 200A Siemens and has a branch circuit to the house of 100A. I bought a ...
5
votes
3answers
207 views

Rewiring house and replacing breaker panel. Wiring layout and breaker selections

I'm doing a major kitchen and bathroom remodel project and decided the old federal pacific breaker box needs to be replaced. Since I'll be rewiring the bath and kitchen, I figured it makes sense to ...
0
votes
1answer
46 views

light switch trips breakers at random, but never itself

I recently installed a monorail lighting kit in my home office; I wanted another spot-light which meant I need to swap out the included transformer to something that would allow more than 100 watts. ...
1
vote
1answer
63 views

Circuit breaker panel voltage drops when a load is added

I have a 240 volt 225 amp sub-panel. Both lines attached to the bus bar have 120v. When I turn on any breaker connected to one of the bus bars, the voltage drops to 80-108v. If I remove the load and ...
1
vote
1answer
26 views

While replacing a GFCI I find it has 2 circuits running into it. New GFCI trips

House sale, inspector pointed out the GFCI at the front of my garage was failing his tester. Trip light was always on but it still fed power. Skip to the end if this is too wordy, but I wanted to ...
2
votes
1answer
85 views

It it safe to have a 15 amp GFCI outlet on a 50 amp GFCI breaker?

My friend just got rid of her hot tub. The person that took it put an outlet where the tub was. He put in a 15 amp GFCI at the outlet but left the 50 amp GFCI breaker in the panel box. Is this ...
1
vote
1answer
49 views

Noisy breaker, whats the reason

One breaker started making a noise every time after i put it on, sometimes its immediately after switching it to on and sometimes it starts after a few seconds, and after a while the noise gets lower ...
1
vote
1answer
59 views

How can I replace an I-T-E panelboard? [closed]

I have an old 225 Amp 30 space commercial flush mount sub-panel in my home with bolt on breakers that has worked for years. Now, there's 120v on one bus and 0 volts on the other bus. When I remove ...
0
votes
1answer
61 views

Dead circuits with breakers across from each other

I have 4 dead circuits which were intermittent off/on at first- now dead. The 20 amp dual tandem breakers are across from each other in the breaker box. The breakers/circuits above and below the ...
4
votes
3answers
423 views

What should I do if the AFCI breaker neutral pigtail is too short?

I am wiring a house that I built, and code says I need an AFCI for the bedroom circuit. The panel that I will be installing this AFCI breaker in is a subpanel, so my ground/neutrals are on 2 ...
2
votes
1answer
54 views

Maximum breaker on NMD7 8/3 wire?

My mother in law recently replaced her 4 burner Frigidaire range and is often popping her breaker when she is cooking for a large party - ie 4 burners going and oven. I checked the specs for the ...
4
votes
3answers
118 views

Is one circuit connected to two breakers safe?

We redid our bathrooms and had an electrician come in and put in new wiring for outlets, heater/fan/lights and heated floors. He had to replace the electrical panel, because the house is older (1956) ...
0
votes
3answers
112 views

How can this panel pull 100A without any breakers tripping?

I have a three phase panel fed from a three phase 100A breaker on another panel. I found the 100A breaker tripped on the main panel, but none of the breakers in this panel were tripped. My ...
3
votes
1answer
46 views

Can manually throwing the dryer circuit breaker cause it to burn out?

What can cause the dryer circuit breaker to heat up to the point that the plastic at the connection melts? Can manually throwing the breaker cause this? My wife has suffered through two house fires ...
5
votes
5answers
2k views

Remote Access to Circuit Breaker

Every once in a while I have a breaker trip when I'm not home. I have a series of computers running cpu intensive programs and sometimes alt coins which can also be hogs :-). At times there is a huge ...
1
vote
1answer
73 views

How many electrical circuits? [closed]

Considering the following appliances, how many separate circuits should I consider for an apartment with 1 bedroom, 1 living room, 1 kitchen, 1 bathroom, and 1 access hallway? electrical oven ...
2
votes
1answer
73 views

Device keeps tripping AFCI device

I have a BedJet device that I run at night that keeps tripping the ARC-fault breaker in my bedroom after about 30 minutes of running nearly 70% of time (other times it works just fine). I have tried ...
6
votes
1answer
134 views

I shorted a circuit, reset a breaker, now much of the house electricity only works if I turn on a wall AC unit

I'm wondering if any of you could guess what might have happened. I live in an older 60s ranch with an older electrical system. I was cutting some shrubs this morning and hit a 3 strand wire that was ...
0
votes
1answer
52 views

How to determine if a circuit breaker has GFCI

I recently discovered none of the grounds in the three-prong outlets in my house are connected to anything. AFAICT the only way this is allowed without GFCI outlets is to have GFCI circuit breakers ...
0
votes
2answers
30 views

Panel switched back on fried garage door opener (need surge protector)

I shut off the power to this entire house, from inside, the larger main switch at the top of the panel. 12 hours later we started hearing the garage door opener circuit board make a noise like a relay ...
0
votes
3answers
114 views

Why is my air compressor drawing too many amps?

I have an old air compressor (1970s/1980s vintage) that has recently started tripping the circuit breaker that it is on. I hooked up a clamp meter and found that when the compressor motor is running ...
0
votes
2answers
58 views

Duplex Circuit Breaker Still Providing Power

I'm in the process of installing a new dishwasher. I uninstalled the old one tonight in anticipation of the new one arriving tomorrow. I got everything unhooked and left the electric for last. I ...
0
votes
3answers
74 views

GFI false trips, but everything checks out. (????)

Any load trips a new GFCI breaker: Conditions: Brand new construction. New 75' 4wire feed to new subpanel from a long working and reliable main subpanel. One GFCI breaker feeding 4 outlets from new ...
4
votes
2answers
92 views

How many circuits should I include in a sub-panel for workshop?

I am looking to run a sub panel for a basement workshop approx 60 feet from the main panel, all inside. I have a table saw, jointer, band saw, planer, and dust vacuum, as well as routers and such. I ...
4
votes
5answers
2k views

What can I do “spread” load on breaker for single bedroom?

Thanks for the help ahead of time. I'm not a certified electrician, but have VERY extensive experience working construction and repair. I do know quite a bit about electrical, but I'm not sure if I'm ...
2
votes
3answers
253 views

Distributing load in electrical panel

I am in the process of rewiring my house. The house was built in 1950 and even though the service panel was upgraded in the early 70's to a Square D 200 amp service, the system is ungrounded and will ...
1
vote
1answer
69 views

circuit breaker trips

I have a breaker that keeps tripping even when no load is on it. I have already replaced the breaker with new, replaced a ground fault outlet and a dimmer switch ( all on circuit), and same thing ...
0
votes
0answers
11 views

Eubanks 9 SEER air conditioning max circuit breaker size

Can a 50 amp breaker be used with a Eubanks 9 SEER air conditioning unit. We cannot read the plaque information. I bought the property and that is what is currently installed. It's an older unit ...
1
vote
2answers
269 views

Identify type of circuit breaker

My house came with a main panel that supports this type of circuit breaker. However, I am unable to find that type at the store and the breaker doesn't say what type it is. I thought it might be ...
0
votes
2answers
78 views

UPS to bypass tripping a fuse?

I have an apartment setup right now where one fuse has a fair amount of load on it. (Fridge, Microwave, PC). Rarely, when these are all used in conjunction, the fuse trips and I have to turn it back ...
0
votes
1answer
52 views

How to check breaker compatibility?

This is a follow up to my previous question. Thanks to the advice there, I am planning to replace my existing double-pole breaker with a quadruplex breaker. How do I determine that my panel can ...
0
votes
4answers
102 views

Which breaker should trip with a ground fault with a subpanel?

I am installing a subpanel in an outbuilding and understand that I need to use a four wire feed and keep the ground separate from the neutral at the subpanel. I know that is code, but I like to ...
1
vote
2answers
167 views

What type of damage can power surges do?

I've lived in this apartment for a couple of years and electricity have always been bad (a demand in power from a device systematically causes others to fade off). I know that a power surge can cause ...
0
votes
3answers
90 views

Why are lights on 15 amp circuits and receptacles on 20 amp?

I'm wondering about the logic behind 15 amp vs 20 amp. Why isn't everything 20 amp if it is considered safe? If a light circuit shorts, what difference does it make it if trips at 15amp vs 20 amp?
3
votes
4answers
128 views

GFCI and Refrigerator and Circuit Breaker

We have a new home and a new refrigerator. The refrigerator is plugged into a standard outlet and on the same circuit is one GFCI. While using a hand mixer on the GFCI outlet the circuit breaker - ...
1
vote
1answer
54 views

Computer makes USB unplugged noise when I run the microwave/heater

Not sure if this is the correct place to ask, but my computer, heater, and microwave are all on the same socket. I have had times when if I run the microwave, the fuse blows. But just curious, if I ...
2
votes
1answer
166 views

How to wire ground when the sub-panel is Plug-On Neutral

I need to install a sub-panel in my home. Both the main panel and the sub panel are in the same building. I purchased a Square D Homeline Indoor Plug-On Neutral panel (Model # HOM2040M100PCVP) for ...