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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Both routers had the symptom of plug it in and nothing happens and I've ruled out polarity as the problem both times and >12V the second time. at this point linksys has accepted router 1 under warranty, so I have no plans of opening router 2 to inspect. The only other thing I can think of is a difference in impedance from power supplies. Worst case a few ohms difference, in which case the router is designed to handle that change in current, but that's my only theory at this point. That is what leads me to fuses. This will also protect against someone using the rig with battery power >12 V in the future. true, I won't be able know for sure what the actual failure is, but at least I won't have to worry about $160 secondary failures.
So, unless anyone can tell me what we're doing wrong, I'm going to be using fuses, and I stand by my suggestion that others do the same.