[Al Skierkiewicz]

It is hard to tell from the posts but it appears the fuse on the Spike is blowing. If you replaced it with a 40 amp fuse and it still blows, you have other issues. There is a short in the compressor or your wiring. Often teams get the compressor wiring under the compressor or wrap it around the "head". Under means the wiring gets clamped during compressor run since the compressor is vibration prone especially if not mounted properly. Around the head, the compressor gets really hot and likely can melt through the wiring.

If you are simply blowing 20 amp fuses in this application then that is normal. The 20 amp fuse in the Spike is guaranteed to blow when running the compressor. Start current is 25 amps while run current is 10-12 amps. Replace with a 20 amp breaker.