Search results

yes a gfi works on an ungrounded system. all the ground fault protection is a measure of current coming in and current leaving. when there is an imbalance then it will trip. so on a three phase three wire system plus ground you put the ct's around the b phase. Granted it is not a corner grounded...

Can you plug a HID Ballast into a GFCI protected circuit, one that trips between 4-6mA not the GFI type that trips at 30mA. Because the winding in the ballast will take a few mS to return on the current carrying neutral thus leaving in imbalance in the startup only which would trip the GFCI. I...