The original owner of this OP2 system had installed a heat tape circuit (for his gutters) and controlled it with an HPFM module connected to a 20Amp single-pole Siemens GPFE breaker. I measured 68-70 volts when testing this circuit and at first thought it was miswired or that the breaker had failed somehow. However, when I rewired it with another HPFM module, I observed the following:
Any thoughts on what my cause such behavior?
- When the HPFM was switched ON, I measured 110V on the blue (load) wire.
- When the HPFM was switched OFF, I measured 68V on the blue wire (instead of the 0V I was hoping for...).
Any thoughts on what my cause such behavior?