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
votes
1answer
179 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
586 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
6k 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
3answers
989 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
823 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
372 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
125 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
573 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
102 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
92 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
143 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
483 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
2answers
8k views

What is the purpose of a double pole breaker for separate 15A circuits?

My new house is done being built and I am going to come in and install my new gas range and dishwasher, both 120V 15A appliances. I got thoroughly confused looking at the breaker box because gas ...
2
votes
1answer
57 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
3answers
80 views

using two oven in one outlet

I have two ovens. One is 20 amp at 240 V and Second is 30 amp at 240V. And I have one 240 V 50 amp outlet hook up to one circuit. Would this be sufficient enough to run two ovens without ...
2
votes
2answers
79 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
686 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
48 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
447 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
99 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
404 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
55 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
201 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 ...
2
votes
1answer
219 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
347 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
710 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
892 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
337 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
125 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
2k 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 ...
2
votes
1answer
501 views

Why does half the house go out when a single breaker trips?

The breaker box at my brother's house is well marked and balanced except when a breaker is tripped half the house goes out. I'm currently living on the third floor of his house. When I turned on a ...
2
votes
1answer
55 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
1answer
201 views

New install: What's causing a tripping arc fault breaker?

We remodeled our home and had all new electrical put it in to plan. For rough-in, the electrician put in regular breakers instead of arc fault breakers. Arc fault breakers are required by code now ...
2
votes
2answers
207 views

Why does a GFCI breaker trip when another breaker is accessed?

I just bought a new house, and on the first day there realized a breaker was tripping. It is one of only two GFCI breakers in the box. It's 20 amp with a bedroom/bathroom on it. I tested every outlet ...
2
votes
2answers
1k views

Use of combination CAFCI and GFCI breakers instead of recepticles

I am about to begin a project that will include one or two new circuit for outdoor lights and receptacles attached to the main building. I will probably installing a new home run line from the panel ...
2
votes
5answers
228 views

Low voltage fuse blowing in furnace

I have an outside A/C compressor and indoor furnace fan combo in the attic. The unit was off and the 3 amp fuse was blown. I replaced the fuse and used the thermostat to turn the fan on followed by ...
1
vote
3answers
84 views

Circuit Breaker change

I am changing a Federal Pacific Electric Co. Circuit Breaker double 40amps but I can't find one. Can I use a double 50? It's for a wall oven?
1
vote
3answers
18k views

What did I do wrong??! Wiring error is tripping circuit breaker

Here's the scoop: There are 3 switches in my hallway. One switch on side A and two switches on side B. Side A switch controls same light as one switch on Side B. I replaced the switch on Side A ...
1
vote
2answers
209 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 ...
1
vote
2answers
6k views

How do i know if my service panel will accommodate a 240v circuit breaker

We are looking to install a hot tub and trying to find out if our service panel will accommodate a 240v circuit breaker. This is what our panel says but I do not know what all of this means: ...
1
vote
1answer
503 views

Is it safe to pull a continuous 18 amps from a 15 amp outlet?

I have a heater that draws a continuous 18 amps and has a 20 amp plug. I created an extension cord to plug into the wall, however on one end it's a 20 amp receptacle - heater plugged into extension ...
1
vote
3answers
984 views

Oven suddenly tripping circuit breaker…bad oven or bad breaker?

We have a double Thermador oven in our house. We've owned the house for around two years, and the oven has worked fine up until the last few weeks. Now, using either of the ovens trips the circuit ...
1
vote
5answers
8k views

What would cause an AFCI breaker to trip under no load?

I have an AFCI Breaker that trips with 0 load - nothing plugged in, no lights on. To test that power is getting to the room, I turn on the overhead CFL lights (very light load) and flip the breaker. ...
1
vote
4answers
41k views

How many lights can be on one breaker?

How many lights can be run from one breaker I would like to add two two tube fluorescent lights to a string of lights I have already.
1
vote
2answers
407 views

Power Strip/Extension Cord on TV stand

I have a question. I have a TV stand with a capacity of 80 lb., and on it a TV that weighs ~50lb. On the wall directly behind my TV, I have two electrical outlets. On the floor, I have a surge ...
1
vote
2answers
94 views

Light sconces tripping circuit breaker

I recently installed two sconces in our kitchen to replace some old halogen lights with LED bulbs. The boxes had three (?!) White wires twisted together, two black wires twisted, and one red. I ...
1
vote
3answers
5k views

Why does my power keep going out to most of my house?

My power frequently goes out, mostly at night or early morning. Sometimes it goes off multiple times in a row, sometimes just once. Most of the time, I can get it to come right back on by flipping the ...
1
vote
1answer
58 views

Identify fuse that is off/bad but not tripped

I have a set of outlets and an overhead light in the garage that are not powered. I believe I know the fuse they are under via simple labels and from some process of elimination. The fuse is not ...