Viair 550 ???

I have a Viair 550 running into a 5 gallon tank. I have 8 gague wire running to a pressure switch and then 8 gague to my compressor. the compressor is grounded straight to the body, grinded then bolted. I have an in-line switch to cut power (leaks a little and compressor turns on in the missle of the night and sets off alarm) I also have a small Buss 30 amp fuse in the power wire. This is my problem, There are times when my compressor turns off (pressure switch) and it will blow the fuse. Sometimes I think the pressure switch turns my compressor off but it really just blew a fuse. I have gone through 15 or so fuses and can't find the problem. I tried regrounding the compressor.

I don't know if its my power wire, does it need to be bigger???? IS my fuse too small???Could it be my compressor filter??Is my in line switch causing this problem???Any one had this problem or know how to fix???