I have a two wire system and after installing GFCI outlet in kitchen I realized there is a problem with some type of inconsistancy causing the GFCI to trip as soon as power is sent to it. Thinking the problem was in an older GFCI outlet I attemped to reuse I purchased and installed a GFCI breaker. Same problem. I'm thinking there is possibly a shared ground in the wiring as the kitchen, dining room and basement lights are all on this breaker. In previous testing while installing a new light I noticed some low voltage current coming through even when the switch was off. Is it possible to get a GFCI to work under these circumstances? There is one outlet downstream from the GFIC outlet. I installed a new conventional outlet in place of the GFCI after installing the GFCI breaker. Everything appeared to work fine with a 20 amp breaker and no GFCI outlet installed.
Electrical – What could be causing GFCI breakers and receptacles to trip
electricalgfci
Related Solutions
Some surge protectors work by "redirecting" surges to the equipment ground, which is pretty much the definition of a ground fault. In this case, it's definitely possible that surge suppressors could be tripping GFCI receptacles/breakers (given a large enough surge).
As for the AFCIs... When electrical contacts separate, they often create an arc between the contacts. This arc spans the gap until the contacts are too far apart, and the arc can no longer be sustained. It's possible (in theory) that the GFCI tripping could create a large enough arc, for long enough to cause the AFCI to trip. It's not likely that a properly functioning GFCI would do this, but if the GFCI was old and worn it could be opening the contacts slow enough that a detectable arc is being produced.
Determining if the GFCI tripping is causing the AFCI to trip, is a simple test. Simply press the test button on the GFCI. If the AFCI trips, you'll have figured out half the problem. If the ACFI does not trip, you could repeat the test using a receptacle tester with a GFCI test function.
If it's determined that the GFCI is causing the AFCI breaker to trip, replacing the GFCI receptacle may resolve that part of the issue.
Figuring out if the surge suppressor is tripping the GFCI, is a more difficult proposition. It will likely require you to monitor the supply voltage over some time, to identify and document possible surges.
Check for a neutral to ground short somewhere on the load side of the GFCI and downstream outlets. Also, make sure there isn't a shared neutral with any other circuit and that you don't have a connection from the neutral load directly to the line side of the GFCI (in other words, the whites cannot all be pigtailed together, the line and load neutrals must be separated by the GFCI).
Related Topic
- Electrical – Use of combination CAFCI and GFCI breakers instead of recepticles
- Electrical – How to add a GFCI receptacle on a circuit with split receptacles
- Electrical – How to wire a GFCI with 4 white and 4 black wires – see pictures
- GFCI not working. Other receptacles do
- Water Test for Grounded GFCI Outlet did not trip outlet TEST button or actual Circuit Breaker
Best Answer
Sounds like the circuit is sharing a neutral with another circuit.
With your GFCI breaker installed, turn off all other breakers. Reset the GFCI breaker, which should now hold. If it does not hold, then you have a problem with the wiring on that circuit and need to open each box to investigate.
If the GFCI breaker does hold, turn each breaker on one at a time until you find the circuit that trips the GFCI. This is the circuit with a shared neutral.
You then need to open switch boxes, light boxes, on both circuits to figure where the neutrals were wrongly tied together. Suspect anything that looks like a homeowner addition, or fix. A common place this might happen would be in a switch box that controls different lights, with two or more circuits feeding the box. An unknowing DIY-er may have tied all the neutrals together.