3 phase GFI

[wireday]

If I feed 120/208 to a piece of equipment that has a 3 phase motor and also take off one leg to neutral for a small circulator., will that trip the GFI?

 

[kwired]

If I feed 120/208 to a piece of equipment that has a 3 phase motor and also take off one leg to neutral for a small circulator., will that trip the GFI?

Depends if the GFCI has a "load neutral" and if it does you must use it for the 120 volt load. If it does not have a "load neutral" you can not supply any line to neutral loads from it, or it will trip.

 

[LarryFine]

If I feed 120/208 to a piece of equipment that has a 3 phase motor and also take off one leg to neutral for a small circulator., will that trip the GFI?

No, as long as the neutral current passes through the GFCI device, too. The line currents need not match.