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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2
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3answers
2k views

What model circuit breaker is this?

I live in an old 50 + year old house and it still has the original circuit breakers. I am trying to search for one that died, but don't know the model or even if they make these anymore. If any ...
2
votes
3answers
5k views

can you combine 2 circuits into 1?

Can I safely combine two 15 amp double pole circuits into a single 30 amp double pole circuit? I am trying to make space in my 200 amp box to put a 40 amp double pole breaker to support a water ...
2
votes
2answers
3k views

What does the latch position of a circuit breaker mean?

I bought a new home in December 2011. After some time the kitchen lights and the lights in the living room started to switch off randomly. Some days it would happen 3-4 times in a row. Other days it ...
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 ...
2
votes
3answers
334 views

Do receptacles require a 20 ampere breaker?

I thought wall recepticles required a 20 amp breaker. Am I wrong?
2
votes
4answers
18k 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 ...
2
votes
4answers
25k views

Why does the main circuit breaker trip but not the smaller branch circuit breakers?

We have one circuit breaker (40 ampere) in entry point of electricity line in our house, than we divided it into two separate line in two levels and put one circuit breaker( 32 ampere) in level one ...
2
votes
1answer
197 views

Main breaker on load center won't open

I was in the process of connecting a Reliance generator trow over switch , although the job was completed , I was trying to shut off power to the entire house by opening the main breaker but would not ...
2
votes
2answers
1k views

What's the amperage on a circuit breaker that's “linked” together?

On our circuit breaker, we have several circuits that are linked together by a metal handle. For instance, there are several cases of three 20A circuits all linked together, meaning you can only flip ...
2
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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 ...
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 ...
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 ...
2
votes
1answer
115 views

How do I read the usage information my electrical meter sends to my power company?

I would like to keep an eye on what information my power meter sends to my electric company. Is there a way to use, for example, powerline networking to read what usage statistics the power meter ...
2
votes
2answers
952 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, ...
2
votes
2answers
466 views

How much current should I expect this motor to draw when it's running steadily?

This fan lists its "Max. Amperage" as 3.2. I assume the motor draws that much when it's first turning on, then settles down to some lower current. How much current should I expect it to draw when it'...
2
votes
1answer
202 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 ...
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 ...
2
votes
2answers
20k views

Why is half of my house without power with no flipped breakers? [duplicate]

The master bedroom and middle bedroom of my 3 bedroom mobile home is without power. None of the breakers have flipped. I even changed the breaker that controls that part of the house and my ceiling ...
2
votes
1answer
16k views

20 amp breaker with 12 gauge and 14 gauge wire

I am looking at replacing a couple of old, porcelain style single bulb fixtures in my basement with some 4 lamp fluorescent fixtures. I am actually running new wire to the fluorescent fixtures from a ...
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 ...
2
votes
2answers
467 views

What size replacement fuse is required for this hot tub?

I recently had a power outage that blew one of our air conditioning fuses (which we were able to fix) and one of the fuses (out of two) in our spa equipment service control board. Next to both fuse ...
2
votes
1answer
136 views

Does this arc fault breaker manage one or two circuits?

I recently tested our breakers to see what was mapped to what. In the process of doing this, I noticed that our arc fault breaker is handling a LOT. Specifically: 4 bedrooms 2 bathrooms Family ...
2
votes
2answers
708 views

Did I damage the breaker by incorrectly wiring a generator?

During a power outage I attached my generator incorrectly (I have never done this before - I just was not paying attention). Anyway, I crossed the ground at the box with the black. When I turned on ...
2
votes
2answers
110 views

All Outlets on Breaker Randomly Give ~8V

All the devices on one of my breakers randomly stop working, and when checked with a multimeter, I see that the outlets are giving a voltage of ~8V rather than the ~125V I usually get. When I check ...
2
votes
2answers
117 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 ...
2
votes
4answers
152 views

Breakers tripping

USA (California) home with 240V 150A service. I have a contractor working on the house siding. He accidentally drilled though NM-B/Romex on a 15A circuit. (The repair of this is not my question and I ...
2
votes
2answers
741 views

How do I go about determining how to wire a breaker box in a cargo trailer

I'm about to wire a cargo trailer with construction equipment, table saw, miter saw, air compressor, drill press, and a few other small tools. Only one tool and lights will used at one time. So here ...
2
votes
4answers
1k views

Any problem with installing two identical circuit breakers in series?

Suppose I want to reduce risk of a circuit breaker malfunctioning and failing to disconnect a shorted circuit. What if I install two identical breakers sequentially (one after another) so that if one ...
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 ...
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 ...
2
votes
2answers
83 views

Can earthing of a building degrade over time

The building is almost 12 years old. We didn't have this problem before. But in this last 2-3 days some residents complained they have experienced shock coming form the pipeline of bathroom even after ...
2
votes
2answers
1k views

Where can I find information on slow blow breakers?

In a previous question, the comments mentioned slow blow circuit breakers. I have done a web search and went to Square-D's website(the maker of my current breakers) and came up empty. There is a lot ...
2
votes
1answer
49 views

Should I replace an old breaker or add a new one?

Our old circuit breaker for our water heater seems to be at the end of its life. However, the breaker also controls our well system, and the breaker is only 20 amps. Is it okay for us to just replace ...
2
votes
3answers
547 views

Can I replace the main breaker in an electrical panel with a smaller one?

I have an older 60amp fuse box in a rental property that is wired as a sub panel off my main 100amp service. I would like to upgrade to a new circuit breaker panel so tenants can not pull out the ...
2
votes
2answers
102 views

Testing circuit breakers?

I have a panel of type XO circuit breakers in my house. One of them has failed closed (!) and I need to replace it. However, a few minutes on Google seems to indicate that this type of breaker is no ...
2
votes
1answer
407 views

How do I recognize which socket cover (fused or 3-pin) connects to which outlet?

I have two power outlets in this room, one is a normal 3-pin (UK) plate cover and the other is a fused (switched) plate cover (much like the one below). I've know removed them and wish to put them ...
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 ...
2
votes
5answers
273 views

Why would a central vacuum breaker trip once every time I used it?

This will be a hard one to find out. I have a central vacuum Drain Vac 2G20028-c , 12.5 amp at 120 volts. It has a mini 15 amp breaker on the unit. The power going to the vacuum is on a normal square ...
2
votes
1answer
84 views

200 amp panel box with some circuits not working

200 amp breaker box in a mobile home. Power just suddenly goes out on all but two breakers/circuits. Each functional circuit is on opposite sides of the panel left side is one breaker down the right ...
2
votes
2answers
59 views

Will powerline networking work in my home?

I'm thinking of starting to use powerline networking for my pc, but I heard that if the outlet near my modem and the outlet near my pc are on different breakers, powerline networking won't work. How ...
2
votes
2answers
316 views

How can I add arc-fault protection to circuits in this panel?

In my sub-panel that services the home I have 4 separate 20 amp circuit breakers all strapped together to trip all if one trips. On these individual circuits are the garbage disposal, clothes washer, ...
2
votes
1answer
304 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. ...
2
votes
2answers
428 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 ...
2
votes
1answer
858 views

20amp breaker trips with NO load…Continuity between black & white wire at electrical box

I have a 20 amp breaker that connects to one wall in my kitchen. It operates 3 outlets, a microwave and two other outlets used for a toaster oven & the last a blender. On the blender outlet ...
2
votes
2answers
1k views

Can a laptop cause an AFCI to trip?

just stumbled onto this site and crossing my fingers that someone will be able to help. My problem is the tripping of an AFCI every 3/5 weeks when a 2nd TV is turned on. Sometimes soon afterwards, ...
2
votes
1answer
413 views

Is my water heater connected to GFCI and is it affected after short circuit?

I am an absolute n00b when it comes to home electrical systems. Please do forgive me if this is a repeat question since I wouldn't know what to search for. I am in France and I have 230V supply at ...
2
votes
1answer
133 views

How can I determine if there is any damage to the conductors of a circuit?

I recently went to replace a couple 3 way switches and, I am ashamed to admit, did not do my due diligence when wiring up. The new switches were a different style and the wiring configuration was ...
2
votes
1answer
4k views

What could be causing a new 20 amp dedicated circuit supported by a GFCI breaker to trip? [duplicate]

I installed a dedicated 20amp circuit home run to support a single duplex outlet in a bathroom. The GFCI breaker is wired correctly. However, When I plug in a load such as a light a the breaker ...
2
votes
1answer
3k views

Why is the circuit breaker for my furnace stuck in the off position?

The breaker for my furnace is stuck in the off position. We were away for the winter and had someone shut it off, and now the breaker won't turn on at all. We shut off the thermostat upstairs thinking ...
2
votes
2answers
5k views

How do I connect a timer to circuit box which controls our outside lights?

Currently our outdoor lights are being controlled by the circuit breaker in the box. We want to connect a timer to the circuit-breaker. There is a junction box with Black, White and a bare ground ...