I am wiring a single family residence that has a septic system with two pumps - 120 Volt 1/3 HP cord connected. As per the local AHJ we have been installing a PVC box with a receptacle and inuse cover in the riser of the tank. The engineer who designed the system came in and said the receptacles can not be located there and just install a conduit and pull the cord through the conduit to a location outside the tank. NEC 400.8(6) says no cords installed in raceway unless otherwise noted in the code. Can anyone help me find a reference where cord in a conduit in this situation is permitted and also a reference where the receptacle in the tank is not? The engineer says that all wiring in the tank needs to be explosion proof I pointed out that the pumps and floats his company supplied are not explosion proof. I think the answer may be to cut off the cord end and use the PVC box in the riser as a splice box and mount a disconnect on the side of the home. He also wants to install the 120 volt float switch cord in conduit back to their control. Again I feel that the cords need to be spliced in the top of the tank and run back to the control with a more suitible wiring method. Is the inside of the tank a hazardous location?
I can see where it might be but the pumps placed in these tanks do not seem to indicate that they are hazardous. The AHJ's in this region seem to want the receptacles in the tank and barring a hazardous location issue it makes sense. What do you think. Any help would be appreciated
I can see where it might be but the pumps placed in these tanks do not seem to indicate that they are hazardous. The AHJ's in this region seem to want the receptacles in the tank and barring a hazardous location issue it makes sense. What do you think. Any help would be appreciated
