compressor question

im runnin 2 viar 450s, no pressure switch im using a regualr switch, whats the best way to wire it up without burnin shit, soleniod, relay? any help would be appriciated

i use a s-55 solenoid i used to run no pressure switch but have one now and still using the s-55. or are you asking for wiring

i know how to wire it i just wanna whats the best way to protect the compressors