Question about Square QO 30 Amp Double Pole Circuit Breaker

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Technical Troubleshooting What is required to cross a Circuit Breaker?

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1. Current Rating. 2. Trip Curve (B, C, D, K, UC-K, Z, UC-Z, etc)

Posted on Aug 27, 2008

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Outside overhead wires crossed and shorted while removing a small branch. It tripped the breaker. I reset breaker, then lost power to circuit without tripping breaker. Also lost power to a separate...


You need to trace out the circuit. Find out which receptacles,
and switches are not working. Starting at the panel, following
the branch circuit that doesn't work and check all the wiring connections. Make sure the power is off before you check these
connections for safety sake. NO SHORTCUTS!

Sep 01, 2013 | Circuit Breakers & Wiring Panels

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Wire wont fit in new coleman breakers


Hi - I'm an electrican and would like to help.

If the wire you're trying to install on a circuit breaker doesn't fit - then something is wrong. Typically, circuits are designed around the amount of voltage and current a product requires. The voltage determines the combination of material & thickness of the insulation on the wire and the the amount of current (in amps) determines the size of the conductor or wire. The appropriate circuit protection (fuse or circuit breaker) is selected to protect the circuit from trying to deliver more current than the product requires (in the case of a fault, etc.) which would cause the wire to over heat and potentially cause a fire. So, if the product requires (for simplicity) 120 volts and 20 amps, a wire is selected with the proper insulation for 120 volts or more and conductor sized to carry no less than 20 amps. Aluminum and copper is expensive, so providing larger sizes than needed is a waste of resources and money. A #12 copper wire is suitable for this amount of amps. A circuit breaker rated for 20 amps is chosen. A 20 amp circuit breaker must be able to accept a wire capable of 20 amps - other wise it's not really a 20 amp circuit breaker. Most circuit breakers are designed to accept LARGER wires than needed - because often times circuits will need a wire that is one or two sizes larger due to the length of the circuit (how far the product is from the electrical panel).

If you're seeing a circuit breaker that will not accept the wire, the circuit breaker is probably the wrong size (and if you could force the wire in it - it would probably trip instantly when turned on) or someone has made a very expensive blunder when chosing the wire type and size for the circuit.

If the the latter is the case, simply connect a short length of the correct size wire to the oversized wire in an appropriate connector and secure to the circuit breaker terminal screw. otherwise, have a qualified person evaluate the situation. Be smart. Be safe.

Feb 22, 2013 | Electric Circuit Breaker Kit for Furnace

1 Answer

Do i need a main breaker for a 200 amp panal?


This looks like an indoor panel. If you have an outdoor panel next to (or below) the power companies meter, It should have the breaker to feed such a panel. Thus, this indoor panel should only be required to have "main lugs" to receive wire from outside breaker. NEVER size breaker outside bigger than the equipment rating of inside devices. If from the power companies meter you intend to feed this panel, YES it is required to have a Main Breaker.

Apr 02, 2012 | Square D Qo 200 Amp 40 Circuit Indoor...

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Room heater caused 15 amp circuit breaker to go bad. Can we update 15 amp circuit breaker to 20 am (similar to ones next to it)


Probable not, in order for you to install a 20 amp breaker, the wiring must be a #12 gauge cable.Check the power requirement of your room heater. It should be not more than 15 amps. Check and retighten the connections to the heater.
Install a new 15 amps breaker.

Nov 21, 2011 | Circuit Breakers & Wiring Panels

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I have a machine required 125 amp and the current circuit breaker is 95


You will not only need to change the circuit breaker but you will also most likely have to change the wire size running from your machine/disconnect/receptacle. For 125 amps you will need at least 2AWG copper wire

Apr 08, 2011 | Square D Qda32125 3pole 125amp 240v...

1 Answer

Our water heater is not working tried everything else the breakers are old any idea thank you


Water heaters are fully repairable by the homeowner.
You need persistence, a few tools and know-how.
I can provide the know-how.
And you can add a comment, and then another comment to this same post, and it sends me an e-mail, and we can work on your water heater until it's fixed.

That being said,
If the circuit breaker is bad, move the wires to another similar sized breaker, and see if that solves the problem for a while.
However, if all your breakers are burning against the busbar and flickering, you need a replacement main panel and that requires qualified local electrician.
Stop by home depot and ask about local electricians.
Call local school district and see who does their electrical work, and then call that guy to see who can help.

Back to the water heater, have you done any troubleshooting on the water heater?
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
For me to help you with the water heater, I need to know what symptoms you are having.
Add a comment.
Again, if the circuit breaker is the problem, then troubleshooting the water heater is not the issue.

Dec 06, 2010 | General Electric 20 Amp, 1 Pole Thick Type...

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When specs say circuit requirement is 40, do they mean the breaker size?


What are you wiring?
Does it seem realistic that you need 40 Amp capacity?

40 Amp circuit breaker is usually 240 Volt and it goes to heat pump, double oven, or some heavy equipment. 40 amp breaker uses 8 gauge wire.

You can figure a circuit with the formula V x A = Watt
If your VA is 7500 Watts and voltage is 240, then Amps is 31.25

Oct 13, 2010 | Siemens /ite Bq Circuit Breaker Bq3b090 3p...

1 Answer

Is there another breaker i can use instead of challenger breaker less expensive


A Challenger 20 Amp single pole breaker shouldn't be priced much different than any other brand of breaker if you buy them online and not at Home Depot. That is if it isn't the Zinsco style like these:
6115304.jpg
According to Eaton's cross reference a BR 120 will cross with a C 120. You can find the cross reference here:
http://www.eaton.com/ecm/groups/public/@pub/@eaton/@ee/documents/content/1081453631966.pdf
Lowes shows the BR 120 at 3.47

They look like these:
a0b11ce.jpg

Oct 13, 2010 | Challenger 20 Amp 1 Pole C120 Circuit...

1 Answer

Installing an up to date leviton how do i know which wire crosses over to the next? 30A


follow the wires to where they enter the breaker cabinet, the ones coming out of a cable will be a pair, red and black or black and white. If you have a volt meter, turn on one set of switches on the breaker and measure the terminals, the one with 230 volts will be the ones to connect that set of wires to

Sep 04, 2010 | General Electric 40/30Amp 4-pole tandem...

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