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
3answers
165 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 ...
9
votes
2answers
12k views

Should all Federal Pacific panels be replaced?

I understand that Federal Panel Stab Lok breakers have the potential for becoming stuck, overheating, and starting fires. My home has a Federal Pacific panel but no outward markings of being a Stab ...
2
votes
3answers
2k views

How can I shut off circuits when I have a generator with an automatic transfer switch?

We had professionals install a generator with an automatic transfer switch. I showed them our circuit-breaker box and told them which circuit numbers should be on generator power. Okay, everything's ...
1
vote
1answer
34 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
7 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
4answers
111 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
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 ...
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 ...
0
votes
2answers
41 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
34 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
50 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 ...
0
votes
1answer
48 views

Thermal protection switch replacement in recessed incandescent can lights

I find very little discussion of this issue on the net. My son has a Nutone Scovil 60 watt max incandescent recessed can light, damp location rated, in a shower with a high ceiling. Its thermal ...
1
vote
2answers
78 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 ...
4
votes
2answers
11k views

low voltage from circuit - bad breaker?

Background: I'm doing some rewiring work in the kitchen. There were three circuits coming into a junction box that controlled the sink disposal, dishwasher, a few receptacles and a light. So I got ...
2
votes
4answers
13k views

Three dead power outlets, no tripped breakers

A few days ago I was using a multimeter to check for current to the thermostat on my garage refrigerator. I wasn't thinking and did something wrong (wrong HOT, I believe) and power to the refrigerator ...
0
votes
1answer
57 views

Whirlpool washing machine won't start, need help replacing fuse

My Whirlpool washing machine died today. The control panel lights are unresponsive, so it looks like there's a problem with its electricals. The socket works, and the troubleshooting manual mentions ...
0
votes
3answers
77 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?
4
votes
4answers
278 views

Different circuit breakers keep tripping, some not re-setting

Background: South Carolina house built in 2009, assume all electrical systems, main panel and circuit breakers new at that time. I moved into the house in May having transferred from the UK. I brought ...
2
votes
5answers
226 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 ...
3
votes
4answers
92 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 - ...
0
votes
3answers
1k views

Got a used Electric oven - not sure what wire and breaker to use

We just got a used electric oven. We had propane, but no longer have access to propane. Currently there is only a standard wall outlet behind the oven. I realize I need to run a new wire, etc., but ...
1
vote
2answers
296 views

Circuit breakers off, but meter still running

I purchased a house a few weeks ago and got the power connected about a week ago. The house has been empty and I leave all the circuit breakers off. The Meter is digital but the display doesn't seem ...
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 ...
0
votes
2answers
81 views

Is this a faulty GFCI receptacle?

Need some advice on an electrical issue I'm having in my new condo. My bathroom has a GFCI receptacle (similar to this one). I noticed one morning that the LED indicator was out, so I figured ...
1
vote
1answer
39 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
56 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 ...
1
vote
0answers
38 views

Tankless water heater - Electric issue

I have a AuqaPower Tankless water heater I installed myself 2 years ago. I used the old wire from old (tank) water heater and I ran a new wire for the 2nd place. It has worked great for 2 years and ...
0
votes
3answers
39 views

What breaker size for box containing two GFCI circuits?

What should the main panel breaker size be to control a 60amp GFCI for a hot tub and a 15amp GFCI outlet. The gfci's are mounted in a box that will be wired to the main panel.
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 ...
3
votes
5answers
97 views

Need another 240v breaker

I bought a device called Sense to monitor home electrical usage that is installed in your electrical panel. The device needs to be connected to a 240v breaker like this: The problem is that I only ...
5
votes
3answers
2k 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 ...
3
votes
4answers
41k views

Why did I lose power to half the house when the breakers did not trip?

Using a voltage detector I determined that three breakers in the panel are not conducting voltage, yet they are fully on (not tripped). Thinking they were bad, I replaced a double throw 15 amp and a ...
2
votes
1answer
110 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
265 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
58 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
78 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 ...
4
votes
3answers
266 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
258 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
14 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. ...
1
vote
1answer
68 views

Why does my greatroom have a GFI breaker on the circuit?

We moved into a condo in 2012 and have had issues on one of the circuits. The circuit serves the outlets in our great room and sun room. Initially, we would trip the breaker when using the vacuum ...
0
votes
2answers
73 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
62 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
37 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
51 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 ...
16
votes
6answers
5k views

Is there a lifetime failure count for a breaker?

I have an external cutoff for my air conditioner that has two physical fuses (TR-50's, time delay 50 amps) outside. This is between the condenser unit and the main power panel, where it is protected ...
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. ...
3
votes
4answers
9k 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
78k 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
178 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 ...