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Kenny101 04-07-2012 11:13 PM

arc fault breakers keep tripping
Working on a small remodel. we were required to add 2 arc fault breakers for the new rooms. as soon as somthing is pluged in it trips the breaker. Same thing on the other circuit. no miss wiring, no shorts, no overload. If i take the wire off and land it on a standerd breaker it will hold a load.

the breakers are on a 150 amp subpanel. is it possible the breakers are picking somthing els up off the main bus and tripping? Its an older home with alot of existing wiring.

Any help would be great


jbfan 04-07-2012 11:18 PM

New circuits or added to exsisting?

k_buz 04-07-2012 11:25 PM

Are you plugging the same thing in each time? Is, what you are plugging in, turned on when you plug it in? How are the circuits wired? 2 2-wire circuits, or 1 3-wire circuit?

Kenny101 04-07-2012 11:36 PM

They are new circuits. I have tryed plugging in a couple different things. within a couple seconds it will trip.

k_buz 04-07-2012 11:38 PM

How are the circuits run from the panel? Each with its own neutral, or are they sharing a neutral?

Kenny101 04-07-2012 11:38 PM

Its pretty basic thats why im confused. It is two 2 wire circuits. they just hit a few receptacles in each room.

k_buz 04-07-2012 11:39 PM

Where did you land the neutrals from those circuits in the panel?

Kenny101 04-07-2012 11:41 PM

each circuit has its own neutral. I pigtailed each plug...

jbfan 04-07-2012 11:41 PM

Disconnect the wires after the first receptacle and test.

Some of the basics are
Neutral/ground touching somewhere.
Over driven staples.
Neutral wires not connected to the breakers.
Crossed neutrals in the panel.

k_buz 04-07-2012 11:42 PM


Originally Posted by Kenny101 (Post 894178)
each circuit has its own neutral. I pigtailed each plug...

Did you terminate the neutral from those branch circuits to the breaker or the neutral bar?

Kenny101 04-07-2012 11:42 PM

neutral bus...witch is maxed out by the way. but nothing is doubled up.

Kenny101 04-07-2012 11:42 PM

neutral bus...

k_buz 04-07-2012 11:43 PM

There's your problem.

The neutral from the branch circuit needs to be landed to the breaker then the white coiled wire off the breaker goes to the neutral bar.

k_buz 04-07-2012 11:45 PM

I think I should be more specific...there are two different terminals on the breaker (unlike a normal breaker) the front one is for the hot and the back one is for the neutral.

Check the instructions that came with the breaker.

Kenny101 04-07-2012 11:46 PM

ok thanks. i will swap them over. This is my first time dealing with these breakers. Thanks for the help.

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