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1answer
4k 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 ...
7
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4answers
3k 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 ...
3
votes
1answer
244 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 ...
3
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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
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1answer
676 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?
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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 ...
3
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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
7k 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
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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 ...
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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
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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 ...
6
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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
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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 ...