Electric Fan Fuse Size

Select fuse or breaker size from column 3 or 4.

Electric fan fuse size.

Go vertically to the head of that column for the recommended wire size. A single 10 inch fan can draw anywhere from 5 20amps. Add it all up. 700 2 80 5 80 1 1880ma in total.

The important part to keep in mind is how much current your fan system will draw. If you want to put all of these on a single circuit you ll need to know the current. Although 12 gauge will carry 20 amps you should not exceed 75 of a wires capacity for extended period of time so for fans that will draw a constant 20 amps you should use 10 awg stranded copper wire. In the painless performance electric fan relay kit we got from speedway motors a circuit breaker is.

Left most relay standard automotive bosch style relay. If the fans draw a total of 20 amps i would probably fuse them at 25 with a slow blow fuse. You either need the constant 12 volt power to be run through a circuit breaker or a fuse. Select motor size from horsepower column making certain you are in the correct voltage.

The brown wire to pin 86 is the one i need help with on fuse size. As you can see from the diagrams above and below it s really a simple circuit that not only provides the proper connections to control the cooling fans but unlike the switch under the dash method you won t ever have to worry about forgetting to turn the fans on. 12 awg wire is marginal for a 20 amp circuit that will draw 20 amps. Once the key has been turned to the on position but for it to get power it needs a fuse plugged in but i would have no idea what amperage fuse to use.

If you are using 2 fans watching the fuse size relay and wiring capacity is even more important. Here is a picture of the wiring diagram the circuit breaker i believe is a 35 amp. Shoot for good quality 40 amp version not the cheap 20 amp as shown in the picture. Thanks for any offered help.