50 amp shore power

[jsmithelectric44]

Do I need GFI or gfpe protection on a 50 amp Hubble shore power receptacle on a dock, I'm located in Soutwest Florida and the problem I am having is that it is becoming a continuous tripping problem when the customer plugs in...

 

[augie47]

Shore power receptacles need GFPE (30 amp)
If they are tripping, they are doing their job.
Most common problem I found is neutral-ground mix.

 

[jsmithelectric44]

So a 50 amp shore power Hubble receptacle needs a 230 amp GFPE breaker instead of a 250 amp GFI breaker?

 

[hillbilly1]

So a 50 amp shore power Hubble receptacle needs a 230 amp GFPE breaker instead of a 250 amp GFI breaker?

No, @augie47 mistyped, or autocorrect got him, he ment it’s 30 ma (milliamp).

 

[augie47]

Thanks hilbilly... no sure if it's typo or old age.. definitely 30 ma....

 

[kwired]

30 mA is GFPE protection

5 mA is GFCI protection

Either could theoretically be at any branch circuit rating - 20, 30, 50...amps of overcurrent protection

5 mA can be subject to capacitive leakage causing undesired tripping and is better limited to specific items or at least an individual branch circuit and not a feeder where there can be multiple branches connected to that will add to the possible capacitive leakage. 5mA protection can even have too much capacitive leakage on a single branch circuit but with long circuit length. In that sort of case it is best to place the protection closer to the load instead of at the beginning of the run.