DIY Home Improvement Forum banner

GFCI breaker keeps tripping

3289 Views 10 Replies 4 Participants Last post by  Fix'n it
Hello all,

I have a circuit with a 15 A GFCI breaker that powers a single outdoor receptacle. I have been trying to run a small pump (2.2 A) and the breaker would keep tripping. I elected to replace the receptacle and cover since both looked worn out. The replacement would also allow me to look at the wires. The wires all looked good. With the new receptacle wired in and the pump plugged in, the breaker will trip after a few seconds of being energized.

Testing the receptacle with various loads, I noticed that 2-prong appliances work fine. Even the power-hungry 1875 W blow dryer. As soon as I plug a 3-prong cord, the breaker trips.

Something is not working with the ground? How can the problem be further diagnosed and fixed?

Thanks much.
1 - 1 of 11 Posts
As clarification, and correct me if I am wrong but the OP in the first post mentioned "GFCI Breaker" not receptacle. So in this case if the pump were pulling more than the 15 amps it would trip the breaker (GFCI breaker) or even a regular breakrer and it would also trip it if there were a ground fault any where in the wiring between the breaker and the outlet itself.

Is the OP sure that the breaker is a GFCI breaker or a regular breaker and just mixing terminology as in the rest of the thread the GFCI is now being referred to as a receptacle and not a breaker.

Fix'n it:
could you please explain this in a little more detail ? the leakage part.
A GFCI breaker or GFCI receptacle will trip when it senses a current leakage of between 4 to 6 miliamps. This could be due in this case that the pump (motors cause this) is worn. The GFCI (through its electronics internally) measures the current going out on the hot wire and measures the current going back in on the neutral wire, if there is a current imbalance of between 4 to 6 miliamps it will trip indicating there is a ground fault.
See less See more
  • Like
Reactions: 1
1 - 1 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.