which starter contacter

[brightspark]

The amount of current required to hold a contactor coil in isn’t going to be anywhere near the contact rating of the pressure switch so shouldn’t be an issue

we know that but someone allways points these things out someone will come along and state the pressure switch is only 240 v not 415 . you can also wire the motor through just the contactor without the overloads there not realy needed unless a motor is running for long periods unatended