"splitting" a 120v circuit into two.....ground rod required?

I’d consider that a structure over a post in the ground-

On another note, just since you know about that, why would you use a 30 mA trip versus the standard GFCI breakers for a boat dock? It would seem like if you’re getting that much leakage current I’d rather have a trip at 5 mA if I’m in the water.

I’ve never actually designed or took on liability for a boat dock so I don’t know. I’m just wired them up from my previous jobs and always wondered
 
AC\DC said:
On another note, just since you know about that, why would you use a 30 mA trip versus the standard GFCI breakers for a boat dock? It would seem like if you’re getting that much leakage current I’d rather have a trip at 5 mA if I’m in the water.
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The 30ma is only for the feeder, then each of the dock branch circuits have 5ma GFCI. As I understand if a boat tripps a GFCI branch circuit you then don't loose the entire feeder.
All the ones I have seen use a 2-pole GFPE breaker on the feeder.
 
Do any of the details of where the feeder lands(location-wise) matter? In this case the feeder stops at eh very top of dock, basically on land. It then supplies out to the equipment down the dock.

Does that feeder still need GFEP?
 
tortuga said:
The 30ma is only for the feeder, then each of the dock branch circuits have 5ma GFCI. As I understand if a boat tripps a GFCI branch circuit you then don't loose the entire feeder.
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If the fault doesn't exceed the 30 mA threshold of the GFPE on the feeder.
 
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