Power Distribution Center Step 2 - Inside the PDC are many heavy and light duty fuses which protect various circuits which demand a specific amperage.
Heavy w/Light Duty Fuses Step 3 - All fuses are designed with an element which will melt if the circuit amperage exceeds the fuse rating.
80 Amp Fuse Element
30 Amp Fuse Step 5 - Fuse power is supplied by the positive battery cable which is attached to the positive side of the battery.
Fuse Power Feed