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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5
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3answers
4k views

What does “Range” Mean in Electrical Circuits?

The switching have been tripping a lot at my apartment, sometimes an entire wall is completely powerless, but the rest of the rooms are just fine. Usually, I just need to turn the switch off and on ...
2
votes
1answer
116 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 ...
3
votes
1answer
295 views

How do I troubleshoot a newly installed non-working outlet?

I recently spent several frustrating hours trying to figure out why an outlet on a new branch circuit would not power a load even though there was proper polarity at the outlet, my non-contact voltage ...
0
votes
1answer
65 views

How could other breakers have been switched off when one was tripped by a short?

is it possible if one breaker trips, the rest (or some) of the other breakers in the panel will also trip at the same time? we had put in a separate breaker for the bedrooms, once we connected this ...
3
votes
2answers
139 views

Add circuit off main disconnect or sub-panel required?

I have an outside main disconnect of 200 amp and a inside main panel in the garage. The disconnect panel outside also has 8 or 10 breaker slots in it, four occupied with double breakers for sub-panels,...
4
votes
3answers
488 views

What does “Split” label mean on circuit breaker panel?

I'm attempting to map out our home electrical breaker panel. The labels written by the electrician 20+ years ago aren't super helpful, so I've having a go making things a bit clearer. I have ...
1
vote
2answers
318 views

Circuit breaker keeps popping, how do I troubleshoot?

The 20 amp breaker to my garage keeps popping. On that circuit is one outdoor floodlight fixture, one outlet receptacle (with nothing plugged into it), and two light fixtures with 60 watt ...
0
votes
1answer
35 views

Why did my RCD trip when I was working on my de-energised lighting ring?

I'm replacing a light in my hallway. Before starting, I turned the light on, turned off the lighting-ring breaker, confirmed the light went out, and then turned off the light-switch for good measure. ...
0
votes
2answers
107 views

Can I install this array of circuit breakers in my sub-panel?

I have a 30 amp breaker in my main panel, with 12/3 wire ran about 100 ft. To my sub panel in my shed. I'm wondering if I can put a 20 amp breaker for my outlets and a 15 amp breaker for my light in ...
5
votes
2answers
2k views

What are my options to repair a broken tab on a bus bar?

My A/C went out this week. The problem was a broken tab on a bus bar with cut power to one phase of the 220v circuit. My HVAC guy was able to get me going again by swapping the A/C unit to the dryers ...
0
votes
3answers
137 views

How to find the circuit breaker that is connected with my outdoor outlet

I have one outdoor outlet where there is no power coming in and I and unable to determine which circuit breaker is attached to restore the power
0
votes
1answer
42 views

Protecting electronics from electrical surges - plugs with fuses

i was just wondering why the UK 3 pin plug has a fuse ? in South Africa the the Grid is significantly more volatile and lighting strikes abundant ( in the area i live in anyway) i have moved here ...
1
vote
3answers
114 views

Apartment Circuit breaker flips randomly

I'm not sure how to diagnose or fix this issue. I have seen it happen when nothing is on, when a few things are on, and when the heater is on. It does not appear to matter what the electrical ...
1
vote
5answers
11k 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. ...
3
votes
4answers
11k views

Why won't my AC system turn off after I flipped the breaker?

We've got a central cooling air conditioner that was installed in 1984 with a thermostat from that same year. We are replacing the thermostat with a new programmable one (which has a 100% ...
10
votes
6answers
92k views

How do I add more circuit breakers once the breaker box is full?

My house was completely rewired by the previous owner. They tore out all the old knob-and-tube and replaced it with modern wiring. I definitely appreciate this, but unfortunately they left ...
0
votes
3answers
236 views

2 breakers powering 1 set of outlets

this is my first time posting a question to a forum like this. Electrician added a breaker and ran a line to an outlet that had power from a different circuit but had a short in it that could not be ...
3
votes
2answers
186 views

what steps to take after removing a cable from a breaker box?

While building some shelves in my basement, I noticed an electrical cable than ran along a joist and dead-ended. I tested it and discovered it didn't have power. As the dead-end is not particularly ...
5
votes
2answers
46k views

What are the differences between SDS, SDS Plus, and SDS Max drills?

Basically I had to use a breaker last weekend, it was clear I did not need the “heavy duty” as I did not have 6” of solid concrete, but the descriptions of the other options confused me.
2
votes
2answers
86 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 ...
3
votes
4answers
408 views

Why is the coiled white wire on a GFCI circuit breaker smaller than the branch circuit neutral?

I just recently installed a 50A two pole GFCI circuit breaker that was part of a 240VAC spa panel. For 50A I was using 6 AWG wires. When connecting up this type breaker you connect the two poles of ...
0
votes
2answers
31 views

New service continuity

This is a new 200 amp main breaker panel service and with no service drop yet. With main breaker off and with all circuits off I show continuity between neutral and the screw on the breaker when the ...
0
votes
2answers
84 views

my 220v circuit breakers show a voltage but dont seem to be able to drive a load. why?

im racking my brain trying to get my 220v electric cooktop to work. ALL 4 burners do not operate. i read 220v at all the proper places on the switches etc but when i turn a burner on... the voltage ...
0
votes
1answer
44 views

60 amp detached shop able to run 50 amp hot tub? [duplicate]

my house main panel is 200 amp, the shops panel is 60 amp. My new tub is closest to my shop but wasn't sure it would cause my shop to trip with the tub on its 50 amp gfci circuit? I was going to run ...
0
votes
3answers
246 views

Is this true about circuit breakers being out of phase in a house?

I just read this on another message board: If you know which breaker each outlet is on, it's easy. Breakers that are directly adjacent to each other (above/below or left/right) are on ...
0
votes
2answers
113 views

NEC Breaker Selection for Motor Loads

In the case of motor loads connected to a long branch circuit, why does NEC Table 430.52 limit selection of an over current protection device (OCPD) to a smaller size than the branch conductor will ...
0
votes
1answer
95 views

How many amps can this breakers box provide?

I bought a house from the early 80s and I'm trying to figure out how much amps I can use safely, if it is possible to add air conditioning on the current electric system, and in general if the current ...
0
votes
1answer
46 views

Wire size of unmarked wires

Can anyone guess the size of these wires? They are not marked.
0
votes
2answers
44 views

Wiring breakers

I left extra wire in the box in case I needed to move to another breaker do I have to strip the entire length of the orange wire or can I just strip parts of it?
1
vote
3answers
2k 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 ...
2
votes
2answers
61 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 ...
0
votes
2answers
131 views

Switched outlet keeps tripping breaker

Re-wiring the garage and running into an issue with a switched outlet. The outlet is in the middle of the run (after a GFCI and before a single ceiling outlet for the door opener). I've split the ...
0
votes
2answers
59 views

My lamp was making a noise. Now it won't turn on. How to fix?

The lamps in my bathroom was blinking and making a hissing noise. I think the noise was coming from just one of the lamps but I'm not sure. Now I don't have any light / power in the bathroom. I ...
0
votes
3answers
613 views

Distance between floor and breaker panel?

How far off floor should circuit box be? Changing from 100 to 200 amp. Lead in wires are underground and come into bottom of box making them too short to connect.
0
votes
1answer
37 views

Circuity Breaker 2 pole Amp Label

Old breaker needs replacing. Is this a 2 pole 40 amp breaker (40 each pole) or a 2 pole 20 amp breaker? (20 + 20 = 40).
0
votes
0answers
153 views

how to wire a 220v 110v transformer at the circuit breaker

does some have a diagram that shows how to wire a 220->110v transformer at the main circuit breaker.. i have a wire ready with 220 and a another ready to receive 110v .. the 220v ready wire has has ...
0
votes
1answer
77 views

Evaluating possible early breaker failures

I'm leasing a commercial space and I have concerns about the breakers and electrical space. All the lights in the space are switched by the breakers, so the breaker box gets visited at least twice a ...
14
votes
1answer
2k views

Why does a USA/Canada surge-protected extension lead (110V) trip my circuit breakers in the UK (220V)?

I moved from Canada to the UK and for convenience I would like to use some of my Canadian aquired extension leads (for light power items such as ethernet switches). Problem is that the surge-...
4
votes
2answers
766 views

Why does my circuit breaker keep tripping for a lighting circuit?

I have 4 light poles with 70 wattage bulbs in it. What size breaker do i need to run all four of my light poles. I have a 20 breaker on it, but the breaker keeps on tripping. Please help me.
1
vote
0answers
74 views

How do I add a bell transformer to THIS consumer unit

I'm trying to add in a bell transformer to my existing Hager consumer unit. It's from about 1995. I live in England. The first image below shows the front cover, with five spare ways and their ...
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 ...
0
votes
1answer
153 views

Kenmore washer won't start after tripping breaker

I've got a Kenmore top-loading washer, model #110.28782700. It stopped working in the middle of a load. I determined that it tripped a breaker, but after resetting the breaker, the machine won't start-...
3
votes
1answer
161 views

Water hammer or something else?

I'm having a bit of a mysterious problem. A couple of weeks ago I've replaced a dimmer switch in the upstairs bathroom. Of course while working on that I shut off the electricity for that part of the ...
0
votes
3answers
94 views

Breaker box that is full

My box is full and I have a gas water heater and trying to switch to a electric tank. Could I just take out two of my 110s and replace it w a 220v for the new tank.?
1
vote
2answers
182 views

50 Amp tankless water heater and 30 amp double pole switch

I just moved into a house. I have a 50 amp max tankless water heater. The circuit breaker is 50 amps. The water heater is connected to a NEMA 10-50 power receptacle. There a switch to turn on and off ...
0
votes
1answer
316 views

How to Hook Up 120V & 240V On AC Disconnect?

I'm attempting to wire a RV for hooking up to 50 Amp Service. Using a AC Diconnect (60-Amp 240-Volt 240-Watt Fused )connected to a (PowerMark Gold 125-Amp 4-Space 8-Circuit Indoor Main Lug Circuit ...
1
vote
1answer
8k views

Can you put a small breaker panel after a 30 amp breaker from main panel in the house?

Looking to run lights in my garage. If I put a 30 amp breaker in my main panel on a 10 wire to a small breaker panel in my garage, can I put 2-4 15 amp breakers out there for the lights? Likewise, ...
4
votes
1answer
356 views

Whats purpose of four pole breaker?

Was working on a friends house today. Mostly running a new branch circuit for an upgraded kitchen. That all went fine. The panel in the basement has a four pole breaker as the main. I've never ...
3
votes
3answers
4k views

Why does the breaker trip occasionally after I installed a new light fixture?

We bought a house a couple of years ago with a covered light fixture box in the ceiling (a blank cover over a wired box and a blank cover over the switch box). I recently modified a plug-in pendant ...
2
votes
2answers
357 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, ...