I had a nice little minor electrical fire today. The 20 amp fuse on the hot lead to my flexalite fan not only failed, it melted and burned a little. I checked, and this was the fuse holder that the PO said came with the install hit. It was a 12AWG wired fuse holder that was crimped to 10AWG wire connecting to the fan. I checked with the MFG and the running amperage of the fan is 15-25 amps. I measured 17 amp load with the fan running.I assume that there would be a spike in amperage on startup, but I do not know how high. I replaced the 20 amp fuse that burned up with a 40 amp fuse with new 10awg wire throughout, including the ground, all connections soldered and heat shrinked. I left the smaller wire on the low amperage AC relay. (that turns the fan on when the ac is turned on.) I checked everything with the meter and did not find any shorts or ground problems. My questions are, what could cause a fuse like this to fail in this way? Is my 40 amp fuse the right one? Should I consider a self resetting circuit breaker or a fusable link? What about a slow acting fuse? I am not an electrical expert, but I want this to be correct and safe
Kevin
Kevin