We have a 240/120V 3-phase diesel generator rated at 60kW/75kVA (stand-by) and 55kW/68kVA (prime). The rated standby amps is listed at 180A, and the output breaker is 200A. The generator is mounted inside a trailer.
We need to be able to connect this to an equipment shed for back-up power in the event of a power outage. The shed has 240V 3-phase 200A service. There is a transfer switch for the 3 phase lines; the neutral is NOT switched (so the generator is not separately derived). Inside the generator, there is a label stating: "NEUTRAL bonded to FRAME."
I have an Appleton 200A 4W/4P Powertite pin & sleeve receptacle and mating plug. Both of these have a small internal tab (with threaded hole) that is mounted inside and screwed to the aluminum housing of the plug/receptacle. Presumably, this is a bonding lug, but it is very small compared to the size of the terminal lugs for the primary conductors.
I need to source some flexible cable for making the power cable between the generator and the equipment shed service. I am planning to use Type W Portable Power Cable. I think I only need 4 conductor cable: one for each of the 3 phases + one neutral. Is that correct, or do I also need a separate ground conductor?
We need to be able to connect this to an equipment shed for back-up power in the event of a power outage. The shed has 240V 3-phase 200A service. There is a transfer switch for the 3 phase lines; the neutral is NOT switched (so the generator is not separately derived). Inside the generator, there is a label stating: "NEUTRAL bonded to FRAME."
I have an Appleton 200A 4W/4P Powertite pin & sleeve receptacle and mating plug. Both of these have a small internal tab (with threaded hole) that is mounted inside and screwed to the aluminum housing of the plug/receptacle. Presumably, this is a bonding lug, but it is very small compared to the size of the terminal lugs for the primary conductors.
I need to source some flexible cable for making the power cable between the generator and the equipment shed service. I am planning to use Type W Portable Power Cable. I think I only need 4 conductor cable: one for each of the 3 phases + one neutral. Is that correct, or do I also need a separate ground conductor?