Wiring of pressure switch and adjusting psi/cut off rate.
 

To follow up on my previous post, I will give a overview of how the pressure switch is wired

There are 4 terminals and are numbered from left to right from 1-4

I have wired my pressure switch where by the left of the pressure switch allow the entrance of the wires that send electricity to the motor. The right had side represents electricity coming into the pressure switch, on both ends of cable, it is important to identify the ground wire.

The ground wire is placed at the bottom of the pressure switch on both ends.

Terminals 1 and 3 represent wires from one conduit (motor)

Terminals 2 and 4 represent wires from another  (power)