I bought the 12volt puma air compressor from e-bay. It comes with the pressure and on/off switches already. I have temporarily installed it with wires running straight to the battery but want to add some protection. It has a max current draw of 30 amps. Would it be best to install a circuit breaker to it? And would it need to be 30 amps or greater? One of the off-road mags gave me the idea of mounting it in my toolbox and they installed a 100 amp breaker, but i dont think that compressor draws that much. Also, if I am using the switch on the compressor for onoff, do I need a relay? Thanks for any help.