generator interlock on resi sub panel

[jmbs]

Is it acceptable to power a swimming pool sub-panel with a portable generator and interlock device?

 

[kwired]

I don't see why not.

 

[hillbilly1]

With the interlock, it’s only switching the hots, so all of the bonding and grounding should still be intact. So shouldn’t be any different than the utility providing the voltage.

 

[Srv52761]

With the interlock, it’s only switching the hots, so all of the bonding and grounding should still be intact. So shouldn’t be any different than the utility providing the voltage.

Should the generator be bonded or not, and have its own ground??

 

[hillbilly1]

Electrically it doesn’t matter, because the utility service bond will do it for you if the generator is not. Now if you were also disconnecting the neutral, then that would be another story......

 

[kwired]

Should the generator be bonded or not, and have its own ground??

If the generator has it's neutral bonded it is a separately derived setup and you must also switch the neutral with your transfer equipment.

If the generator does not have neutral bonded it is a non separately derived setup, you must run separate neutral and EGC to the generator and all your bonding and grounding is already done at the service equipment.

 

[hillbilly1]

Another issue is if the neutral is bonded at the generator, and the generator has built in ground fault protection, the internal ground fault will trip as soon as you put a load on the generator (if you don’t switch the neutral)