I just read where someone paid $200.00 for a 200 Amp fuse between their battery and their inverter.  Look on E Bay under car amplifier circuit breakers.  They can be reset instead of a one time thing and they are listed at under $10.00.  At that price it would be prudent to use them at all battery feeds!

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Comment by John "T" Nordhoff on December 8, 2012 at 10:13am

I have the SAME question as Richard. What some people loosely call "fuses" most items Ive seen advertised for car stereo system protection are actually re settable circuit breakers. As long as they trip out (open) at the amperage indicated and do so within a reasonable nearly instantaneous time (i.e. they are NOT slow blow or delay type devices) I see no reason they wont suffice BUT I DONT HAVE THEIR SPECS IN FRONT OF ME SO I CAN NOTTTTT SAY, so dont anyone have a calf if this isnt correct!!!!

One advantage of a re settable circuit breaker versus a one time mechanical fuse is that once the fuse blows its done for and needs replaced after the problem is cured while you simply re set the breaker.

Another thing some lay persons dont understand is that the fuze or breaker, if used to protect the downstream wiring from conducting current beyond its ampacity (overheat and start a fire), needs to be located at the SOURCE NOTTTTTTT way down the line where the load is. Sure, the load is still protected from excess available ampacity if placed there and the source is likewise protected BUT the feed wires from source to load are NOT protected unless the fuze/breaker is located at the source as it should be....

As a retired electrical distribution design engineer I can tell you the way things are done is to FIRST compute the load,,,,,size the wiring to feed that load such that its ampacity isnt exceeded,,,,,,,size the overcurrent protection device (fuze or breaker) to PROTECT THE FEED WIRES

I i were designing a battery and inverter system and wished to protect the battery and feed wiring and inverter, Id compute the load out of the battery,,,,,,,,,size the feed wires from battery to inverter,,,,,,place an overcurrent protection device AT the battery so the wiring from battery to inverter input is protected,,,,,,,Compute the loads OUT OF the inverter,,,,,,,,size the feed wires for those circuits,,,,,protect those wires (each circuit) with an overcurrent protection device.

AGAIN BEFORE ANYONE HAS A CALF This may well be overkill and Im NOT saying it allllllllll has to be done, IM ONLY describing the process and engineering reasons of proper overcurrent protection....

Hope this helps, yall take care n keep safe now

Ol John T in Indiana

Comment by john nancy on December 1, 2012 at 10:27pm

I have Trace fuse and the are pretty expensive,I'm thinking using less expensive one for rest my rig ,I'm going to use all my circuits on my rig on the same circuits for my inverter,I don't want all my circiuts getting fried

I'm going look into that 



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