How to wire a 4 pin heavy-duty relaystraightforward wiring for 80 amp electrical control
This 4 pin make & break relay acts as an ON/OFF switch that is normally OFF when no current is passing through terminal 85.
When current is allowed to pass through terminal 85 by means of a low-current switch, the relay turns ON and feeds power from terminal 30 to the high-current accessory on terminal 87.
Requires two 0.375″ yellow female disconnects for power circuit (terminals 30, 87) and two standard 0.250″ female disconnects (red or blue) for control circuit connections (terminals 85, 86).
MGI recommends sizing your relay / fuse at 1.25 x rated current for resistive loads and 2.5 x rated current for motor loads (fans & pumps)