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Old 02-19-2010, 10:34 PM   #1
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Correct wiring of GFCI breaker


I have installed several GFCI breakers and every one had the neutral wire connected to the light colored and white paint marked terminal.
However a friend gave me a Siemens QPF 120 breaker and the load Power is not marked. On the side of the breaker, the pigtail is marked Panel Neutral and the terminal above this is marked Load Neutral. The other terminal which I assume is for the Hot, has a white paint marking and the screw is only slightly darker then the other. The white paint has me confused.
How do I wire this breaker?

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Old 02-19-2010, 10:58 PM   #2
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Correct wiring of GFCI breaker


Assuming the "marked" load neutral isn't a sticker possibly misplaced, it would seem that the most likely answer is to follow what is marked, and by process of elimination, the white marked terminal is the "hot".

If you have a meter, you should be able to test what the voltage potential is of each terminal with respect to the ground to support the assumption.

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Old 02-20-2010, 06:46 AM   #3
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Correct wiring of GFCI breaker


Giles, Are you attempting to install this Siemens Breaker in another panel?
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Old 02-20-2010, 06:56 AM   #4
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Correct wiring of GFCI breaker


Here is how you can test without a meter.

Install the breaker. Connect the panel neutral pigta.l to the neutral bus bar.

Connect the hot from any circuit to one screw. Turn on the breaker (and something on that branch circuit).

Turn off the breaker. Now switch the circuit hot to the other screw. Turn on the breaker again.

For one screw (the hot) the breaker will do an immediate GFCI trip. For the other screw (the load neutral) the branch circuit will be dead.
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Old 02-20-2010, 08:19 AM   #5
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Correct wiring of GFCI breaker


Instead of possibly hooking up a short as Allen described just install the breaker on the buss and measure from each terminal to ground for voltage.

But there really is no need for that either. Just follow the teminal marking for the neutral load for the white wire from the circuit. Every GFI breaker I have seen has the neutral terminal closer to the bottom of the breaker with the hot terminal closest to the top.
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Old 02-20-2010, 08:22 AM   #6
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Correct wiring of GFCI breaker


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Giles, Are you attempting to install this Siemens Breaker in another panel?
.
Yes---That looks exactly like the one I have and I will be using it in a Challenger box.
As you probably know, Challenger breakers are no longer made and are hard to find.
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Old 02-20-2010, 08:27 AM   #7
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Correct wiring of GFCI breaker


Regardless of the difficulty in finding the proper breaker to fit the panel, only breakers listed for use in that panel are acceptable code-wise.

Obsolete breaker can still be purchased in most cases.
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Old 02-23-2010, 03:03 PM   #8
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Correct wiring of GFCI breaker


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Instead of possibly hooking up a short as Allen described just install the breaker on the buss and measure from each terminal to ground for voltage.

But there really is no need for that either. Just follow the teminal marking for the neutral load for the white wire from the circuit. Every GFI breaker I have seen has the neutral terminal closer to the bottom of the breaker with the hot terminal closest to the top.
Jim, I installed the breaker and checked for voltage as you and another suggested. The WHITE marked terminal is for the Hot. This white paint is what I was questoning because all breakers I have worked with in the past had the neutral wire connected to it. This white paint looks factory applied.
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Old 02-23-2010, 03:12 PM   #9
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Correct wiring of GFCI breaker


I see what is causing your question. Just connect the neutral to the terminal labeled "load neutral". By default the other terminal will be for the hot, regardless of color.

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