gfci

[ELKSPARKS]

what are the ramifacations of installing ground fault receptacles on a branch circuit protected by a gfci circuit breaker

 

[bphgravity]

None.............

 

[Jim W in Tampa]

what are the ramifacations of installing ground fault receptacles on a branch circuit protected by a gfci circuit breaker

You will agrivate the homeowner.No danger but no need to protect twice. One or both might trip.
Should add there is more safety with the breaker as it protect the line too and not just the load

 

[tallgirl]

If you get lucky and the outlet GFCI trips first the HO doesn't have to walk as far. If you get unlucky and the breaker trips first the HO is confused ...

 

[NoVA Comms Power]

And if by some lucky chance they BOTH trip ... the homeowner will have to understand to reset the breaker first, then the outlet.

 

[petersonra]

what are the ramifacations of installing ground fault receptacles on a branch circuit protected by a gfci circuit breaker

Extra cost.
Confusion when one or both trip. If both trip and the HO resets the outlet and power does not come back on, how is he to know there is a CB that might also need resetting.

 

[al hildenbrand]

Bryan and Jim make two good electrical points.

To say it a slightly different way, the GFCI circuit breaker will see the "bleed current" of the branch circuit and that will "use up" part of the 3 to 4 milliamp current "buffer" that is required to flow before the GFCI will trip.

This means, that a tool, say, that has a high impedance connection to ground resulting in a ground fault of 2 milliamps whenever energized, will trip the GFCI circuit breaker that already has a 3 to 4 milliamp leak.

The same tool, with 2 milliamp ground fault, will not trip the GFCI receptacle that it is plugged into because the leak in the branch circuit happens on the line side of the GFCI.

What I have just described is electrical behavior as designed. There is nothing in the Code about this.