strippin4livvin
Member
- Location
- Montana
- Occupation
- Electrical Contractor
Hello,
I am bidding on a commercial marina project and have some concerns about functionality as well as unnecessary hazards within the current design. I'm also pretty good at overthinking things at times, so would love to hear some other opinions. Any insight is greatly appreciated. The system is 120/208V 3 phase.
The current design is calling for 125A feeders, feeding through 4 shore power pedestals per circuit (2 shore power receps per pedestal). There are quite a few of these circuits. My concerns are:
-Will nuisance tripping be a problem with 8 boats on the required 100ma GFCE feeder protection?
-Would it be ideal to keep feeders as small as possible to reduce fault hazards on the docks themselves?
It seems it would be ideal to see one 4 wire 30A 120/208V circuit per pedestal thinking this would mitigate fault potential as well as concern of nuisance tripping. Also, for the "bonding of non-current carrying metal parts" portion of 555 should I be looking at sizing up from a #8 to account for the 125A feeders?
Another note the docks are constructed of tubular aluminum, sitting on top of large floating ballasts and topped with wood decking.
Thank you!
I am bidding on a commercial marina project and have some concerns about functionality as well as unnecessary hazards within the current design. I'm also pretty good at overthinking things at times, so would love to hear some other opinions. Any insight is greatly appreciated. The system is 120/208V 3 phase.
The current design is calling for 125A feeders, feeding through 4 shore power pedestals per circuit (2 shore power receps per pedestal). There are quite a few of these circuits. My concerns are:
-Will nuisance tripping be a problem with 8 boats on the required 100ma GFCE feeder protection?
-Would it be ideal to keep feeders as small as possible to reduce fault hazards on the docks themselves?
It seems it would be ideal to see one 4 wire 30A 120/208V circuit per pedestal thinking this would mitigate fault potential as well as concern of nuisance tripping. Also, for the "bonding of non-current carrying metal parts" portion of 555 should I be looking at sizing up from a #8 to account for the 125A feeders?
Another note the docks are constructed of tubular aluminum, sitting on top of large floating ballasts and topped with wood decking.
Thank you!
