Originally Posted by DeepFrz
So you have an AC ground plate under water
. Guess where the current
goes if you have a break in the AC ground wire anywhere in your cct.? I didn't see any mention of an ELCI.
Sorry too many unfamiliar acronyms so I don't understand you. What is cct and ELCI I presume these are US terms?
As far as I am aware if there is a fault in the shorepower cable or inlet box before the onboard RCD the earth route
is via the 'green wire' in the shorepower cable to the marina ground.
If there is a short in the A/C side of the charger
that could go to ground via the immersed ships ground plate, and yes through the water
. BUT only for a fraction of a second until it trips the shorepower RCD (30ma). This is the one on the boat my end of the shorepower lead not anything in the marina wiring
. This also means that if there is both hot fault and
the ground wire from shorepower has a fault I still have protection because more power is coming onboard that leaving.
If there is a fault in the onboard A/C from the inverter
the ground path is back to the Inverter
ground via internal earth circuits same as any onboard genorator. The immersed ground plate is connected to the on-board ground circuit but again any current
flow above 30ma will be shut off immediatly by the RCD for the onboard circuits.
If you think I have missed something please let me know, improvements are always possible!