Quote:
Originally Posted by Rich Sandor
It's not about overloading the circuit by having too many electrics on. It's the fact that any single component can fail internally and overheat the circuit and start a fire.
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Another reason is protection of the wiring itself. When I was doing car audio, the one thing we always did with amp installs, where a separate power wire was run to the battery, was put a fuse right at the battery, despite there also being one on the amp... why? Because if the wire's insulation gets worn through or otherwise damaged anywhere along its route, and grounds to the body, the entire section from there to the battery will get very hot, very fast.