No. Doing so will cause the GFEP circuit on the APS-4C to detect the inductive load of the contactor coil as ground fault and alarm the system every time the contactor is turned on.
The APS-3C is designed without an internal GREP circuit so it will work with external contactors or direct heater loads. In both of these applications you must provide a GFEP breaker to power the heater circuit.
My APS-4C will not reset even when there is no wires hooked up to the unit, it keeps tripping out. Could you tell me why.
While there isn’t quite enough information to answer this adequately, we can attempt some starting discussion points.
ray, assuming that your GFEP is tripping with no load wires attached and assuming that your wiring is 277/3-phase in a WYE configuration with neutrals, you might not have all the neutrals running through the GFEP donut (or none of the neutrals or you might have one run backwards) .
If you’re having GFEP issues, remember: the amount of current going out must equal the amount of current returning in order to have no GFEP fault.