Question about Your One Source Square D #HOM 115CP 15A SP Circuit Breaker

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Circuit Breakers Test

How do I test a circuit breaker?

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  • marki_1522 Feb 22, 2009

    what about the quality?

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First of all, is the breaker bad? How did you test it? Breakers don't usually go bad, very seldom. A simple test is to use a meter and check for voltage at the output terminal. Is it tripping or what is going on? Unhook the wire feeding off the breaker, then reset it. If it holds, it's probably fine. You can use an ohm meter and check for 0 ohms through the breaker too (with it unhooked and out of panel)

Posted on Jun 26, 2009

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To test a circuit breaker you should set the multimeter to "Volts AC" and touch the prongs to the breaker's terminal screw and a ground. If there is no power, the breaker is faulty and requires replacement.

Posted on Aug 27, 2008

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How i do connect the CB in squential timer to run the motor

Posted on Dec 23, 2008

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I have a 40 amp gfi circuit breaker for my hot tub and want to know how to test it to ensure that it is not the breaker that is faulty as they are very expensive and from my understanding they cannot be returned for a refund after purchase

Posted on Dec 01, 2008

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muttandjeff
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SOURCE: how to fix a circuit breaker after a fuse blows

the first thing i would do is to remove the feed wire from the breaker and see if will reset if it does you have a short in the system , tell me more about the system and maybe i can advise further

Posted on Feb 01, 2009

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2 Answers

I have bad spots on my panel. How can I fix it?


probably loose wires at the back of the board
the fix is to get an electrician in to do the job

Aug 26, 2016 | Square D Qo 200 Amp 40 Circuit Indoor...

1 Answer

Will an Eaton br 120 circuit breaker properly replace a challenger c120?


Hi - I'm an electrician and can help you with this question.

It is very important to note that only those circuit breaker models listed on the electrical panel cover are permitted by electrical code to be installed in the electrical panel. Introducing any other brand or model circuit breaker voids the UL or FM listing, regardless if it fits.

This is because the manufacturer sends his product to a UL and/or FM laboratory for thorough testing and certification. The product (electrical panel in this case) is tested with all the breakers the manufacturer supplies with the panel. If the panel passes the tests, the manufacturer receives the much coveted UL and/or FM listing or mark for the panel and breakers that pass and can be marketed and sold. Only those breakers that were tested and passed in that panel and are permitted to be used in the panel and can be considered a UL and/or FM listing assembly. The code allows only those electrical products bearing this mark to be installed. So, even though each manufacturer has their individual products tested in different combinations, they can not be "mixed and matched" between different manufacturers and products not tested in that particular combination. The only the tested combinations the passed are printed on the inside of the panel cover. Mix and match results in an electrical code violation (an inspector would require the correct breaker before giving an approval) and if a fire breaks out - and it is determined that the source was this circuit breaker - most insurance companies will not pay a claim. That's a lot of risk for a $10 circuit breaker.

You should only install a circuit breaker that is listed for use in the panel you have. Check this link for a listing of C120 breakers available for purchase

Good luck!

Apr 18, 2012 | Challenger 20 Amp 1 Pole C120 Circuit...

1 Answer

The prcblem i have is i have no power in one bedroom, but there are no curcuit breakers that are tripped. so how can you test a breaker other than resetting the breaker. also we have no gfi outlets or gfi...


I don't know how technical you are so here are a few easy tests you can try:

plug a known, working lamp into each plug of the receptacle (top and bottom). This minimizes other potential issues.
Switch each circuit breaker FULLY off and then, Fully on. Yes, it is tedious but sometimes, breakers trip and it doesn't always show.
Still not working? Open up the cover plate and look at the contacts. You should have a black wire going to a gold colored screw and a white wire going to the other side, silver colored screw.

The best test you can conduct is using a simple voltmeter (AC) to test if you are getting voltage to the outlet. No AC Voltage? Try going to the known circuit breaker and measure the voltage coming from the known breaker while the other lead is on your neutral bus. Of course, if you aren't experienced with electricity, I recommend you get a licensed electrician to troubleshoot the issue.

As well, I know you mentioned that you tried resetting breakers but with a load on the circuit and someone else verifying it for you, you may just get lucky. More than likely, you will either encounter a faulty outlet, faulty wiring or a faulty breaker.

Apr 12, 2011 | Circuit Breakers & Wiring Panels

1 Answer

Cutler Hammer 20 Arc Fault breaker for bedroom outlets will not reset after activating test switch.


The circuit breaker must be turned to the "off" position first from the middle position, and then to the "on" position. The cutler hammer arc breakers carry a lifetime warranty so if it will not reset you may want to contact the manufacture.

Oct 24, 2010 | Cutler Hammer BR120AF BREAKER CIRCUIT BR 1...

1 Answer

The garbage disposal & overhead sink fixture run to the same Square D Qob120 1pole 15amp 120v Circuit Breaker . After a week of consistentlu tripping, the breaker won't allow itself to reset. ...


I would start by replacing the breaker. If a new one trips then check ground and wiring. If it still trips then there must be a problem with the garbage disposal. let us know

Sep 21, 2010 | Square D Qob120 1pole 20amp 120v Circuit...

1 Answer

I just tested the breaker and it won't reset. I have other gfci breakers in the panel and they test and reset fine. Is there anything that can prevent the gfci breaker from resetting?


yes. If you still have the fault it will not reset. Disconnect the out going wire to isolate the breaker and try again. If it still doesn't reset then the GFCI breaker is bad and needs to be replaced. Hope this helps you, Jeepfxr

Jan 28, 2010 | Cutler Hammer 1 Pole 15 Amp Ground Fault

1 Answer

Hello i have Problems with IDEAL Ideal 61-958 Sure Test Open/Closed Circuit Tracer I tray to found the correct MCB for lighting circuit but the tester would not transfer the signal to receiver and the...


Check the batteries in the unit and test it somewhere else, somewhere you know where the circuit box is. Get familiar with the unit. The lights you are testing may go to a box other than the one you think.

May 03, 2009 | IDEAL 61-958 SureTest Open/Closed Circuit...

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