Open circuit is infinity (∞) or maximum resistance. 0.01 ohms (probably using a digital multimeter) would be a short.
You used a "30 amp circuit breaker inline" rather than a 30 amp fuse? If so, the breaker has a time delay to open to protect the circuit.
Unfortunately it can give more time for other parts to fail as well.
Usually the fan manufacturer provides a recommendation of fuse type and amperage rating.
Last edited by buoymaker; 07/10/2021 4:11 PM.
