Pond areator

[yetiman]

I have a old existing 240v 3 wire uf feeder to a pump house that is about 3 feet from a natural pond. The customer wants to add a 240v 20a outlet on the outside of the pumphouse to feed a new aerator. The aerator would be on a 24hr timer inside the pumphouse. The way I interpret 682 is that only equip. installed outside would require an equipotential plane. If all the equip. were inside except the receptacle the pump would plug into then an equipotential plane is not required. Then the only req. would be a GFI breaker for the pump?
The other rabbit snare is that now we would be changing the panel for the pumphouse and the pumphouse is right next to the pond. This new panel will be wired to service only line to line loads. According to 682.11 it needs to be 5' from the shoreline, do you think that means the building or the actual equipment inside? To me it may be a AHJ call seeing as it is an existing building. Any comments?

 

[ceb58]

I have a old existing 240v 3 wire uf feeder to a pump house that is about 3 feet from a natural pond. The customer wants to add a 240v 20a outlet on the outside of the pumphouse to feed a new aerator. The aerator would be on a 24hr timer inside the pumphouse. The way I interpret 682 is that only equip. installed outside would require an equipotential plane. If all the equip. were inside except the receptacle the pump would plug into then an equipotential plane is not required. Then the only req. would be a GFI breaker for the pump?
The other rabbit snare is that now we would be changing the panel for the pumphouse and the pumphouse is right next to the pond. This new panel will be wired to service only line to line loads. According to 682.11 it needs to be 5' from the shoreline, do you think that means the building or the actual equipment inside? To me it may be a AHJ call seeing as it is an existing building. Any comments?

That may be a tough call. Are you changing the feeder to the building? It looks as if 682.14 (B) will be the catch. The receptacle would be the disconnecting means for the pump. "not closer than 5ft horizontally from the shore line"
Ether way replacing the feeder or reusing the existing one you may be able to back away from the pond and use R3 equipment on a pole or frame.

 

[Smart $]

Why not install the aerator inside the pumphouse and just run an aeration tube(s) to the pond?

It appears there is no relaxation on the distance requirements for walls and other types of barriers. Is or can the electrical equipment be installed on the away side of the pumphouse.