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2
votes
1answer
365 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 ...
7
votes
2answers
421 views

What is the best short-term solution for fused neutrals?

I have inherited a house that has been in my wife's family since 1860. I do not know when it was electrified, but it seems to have skipped knob and tube. There is a lot of fabric-covered wire, and ...
3
votes
1answer
249 views

Single outlet resettable breaker?

Basically I have an uninterrupted power supply (UPS) which has a 20amp plug and I know that the load on the UPS will NEVER exceed 15 amp (Bought it mainly because it can attach more battery units to ...
6
votes
7answers
4k views

How important is circuit breaker breaking capacity?

All else being equal circuit breakers can have different "breaking capacity" - it's the maximum current which the breaker can disconnect and it's typically several thousand amperes. The idea is that ...
3
votes
2answers
2k views

What information do I need to select a circuit breaker?

I am having 2 new lines run in my basement to power a workbench's tools and an unrelated computer station. I have room in my panel for additional breakers, and rather than tie into existing wiring, I ...
3
votes
1answer
1k views

Amp rating of ganged circuit-breakers

Backstory: I'm considering replacing my current tank water heater with a tankless whole-house unit. The units I see generally require a 120-amp breaker circuit. Currently, my panel has two ganged ...
2
votes
1answer
684 views

How do I test circuit breakers?

Suppose I need new circuit breakers and buy some at a local shop. How do I test them to be sure they haven't been damaged on their way from factory and will do their job when time comes?
6
votes
4answers
8k views

How can I tell if a circuit breaker is worn out?

I was installing a light and tripped the breaker (in retrospect, should have turned the breaker off before starting). When I finished installing it I reset the breaker and tried the light switch. ...
4
votes
2answers
3k 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 ...
9
votes
3answers
5k views

What is electrical code for number of wires in a breaker?

US, Georgia I am adding some new ciruits to add some additional outlets. The closest place is to run a wire to the main panel box. My question is, can I connect more than one wire to a breaker and ...
0
votes
1answer
5k views

Why has my garbage disposal started tripping the breaker every time?

I have never had a problem with my garbage disposal or that circuit before, however I am now having issues with it. Every time I turn it on, it immediately trips the breaker. I'm not even sure how to ...
3
votes
3answers
4k 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% ...
7
votes
2answers
8k views

Can I install an additional breaker bus bar on my main breaker panel?

I'm adding several new circuits to my main electrical panel as part of a kitchen remodel. The panel with accommodate the new circuit breakers, but it does not appear to have enough neutral and ground ...
7
votes
2answers
1k views

Are there any “easy” ways to trace a home electrical system?

We bought a home a few months ago, and the electrical panel (and subpanel) are completely unlabelled. We have no way, short of flipping breakers, to know what breaker powers which fixtures. Is there a ...
5
votes
1answer
782 views

What is the primary function of the main breaker in a breaker box? How does it differ from other breakers?

Location: California | United States I'd like to better understand the roles of main breakers and sub-breakers. Why are there multiple levels of breakers? I suspect that sub-breakers are intended to ...
5
votes
2answers
2k views

Why doesn't the main breaker shut off power for house?

Location: California | United States I'm certain I'll need a licensed electrician for this but wanted to get thoughts on what could be going on. I recently noticed that power remains on in my house ...
8
votes
1answer
1k views

Is there an average number of outlets that are wired off of one circuit breaker?

I recently demolished my basement to start a reconstruction/improvement project. My first horror was the electrical layout. I've got hidden junctions, mismatched wire sizes, improper junctions and ...
7
votes
4answers
4k views

Can I replace an outlet that uses knob and tube wiring with a grounded outlet?

Can I replace an outlet that uses knob and tube wiring with a grounded outlet? Obviously the best choice would be to replace the old wiring. Is there a standard way to ground these outlets? Do I need ...
6
votes
2answers
1k views

What is the difference between Square D and QP single pole circuit breakers, and can they be mixed?

I just noticed that all of the branches from my upstairs service box are run off of 15 or 20-amp type QP circuit breakers, except for one 15-amp line that is for the hard-wired smoke alarms- it uses a ...
7
votes
2answers
4k views

How much should it cost to add a circuit breaker?

In this question, I asked about problems between my circuit breaker for a circuit shared by my microwave and sump pump. The conclusion was that another circuit should be added to support the microwave ...
9
votes
4answers
6k views

Why does my microwave keep throwing the circuit breaker?

I have a circuit that powers several things in my house: Kitchen microwave Basement lights Basement sockets Sump pump Recently, this circuit has been thrown with alarming frequency when I use the ...
9
votes
5answers
44k 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 ...