The Point of Fuses

Pauljdav wrote:
No fuse and the worst thing that will happen?
Fire, The battery would put out enough amps to cause a fire if the wire shorted to the trailer frame.

While working on my steps this winter I kept blowing 15 amp fuses to my ignition wire. After much searching using long wires and alligator clips I traced wire from the fuse box to the point of origin I never saw the problem until I opened my slide and found the wire had been caught by the slide mechanism and grounded to the frame. The mechanism was also rubbing on my house battery cable which could have had the same fate. I never would have thought about this as a problem until it happened to me.