Quote:
Originally Posted by Alan Anderson
Excess current is not a failure. It is the result of a failure.
It is also the cause of additional failures, most notably burned wires, and it is those secondary failures which a fuse protects against. But the original fault which led to too much current in the first place won't be affected one way or the other by the presence of a fuse.
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Well the fuse would protect against a device failure. So it would make a difference by protecting the router.
http://en.wikipedia.org/wiki/Fuse_(electrical)