blew up 2 250amp circuit breakers....

[TrlcKed_OuT 10+ year member]

ok ive been to 2 shows in the last month and the first show i blew up a 250amp cb so i thought my grounds werent good enough so i redid them so i know they were good so i goto a show last night and the same thing happend another 250amp cb blew up..and i mean not just tripped they broke inside and are junk...when the go the wire both to the cb and from it is really really hot....i am running the setup in my sig with stock battery and nothing else i no for sure my amps are hooked up properly and ive even checked my gains and the loads and everything seems right any ideaS?????

btw im running 1 run of 1/0 gau. wire to the amps then through a distorblock to 2 4ga.

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[fo0manchu 10+ year member]

check power wires, make sure that they are not hitting ground and that none of your (+) wires are hitting a ground also. Or if something sharp on the chassis cut into your power wire? just a thought.

 

[TrlcKed_OuT 10+ year member]

well the thing that gets me is i play music just as loud all day everyday and it never blows...only when im running sweeps or test tones... i know those are much louder but if it was a short..it would happen even when its turned on...

 

[TrlcKed_OuT 10+ year member]

no one has any ideas?!?! cmon guys im getting a lil tired of buyin circuit breakers...

 

[jrz126 10+ year member]

maybe the circuit breakers are junk...how many amps do you think you are pulling through them?

 

[TrlcKed_OuT 10+ year member]

i wouldnt have thought 250.....

 

[jrz126 10+ year member]

how long does it take before the breaker breaks? If you think of the power disipated by the circuit breaker...assume the amps do put out 1200W each, at 13.4V they will be drawing 180 amps total. Now we assume resistance of the breaker is pretty high (about .01 ohms), P=I^2*R so 180^2 *0.01 = 32.4W Thats quite a bit of power for it to handle.

Do you have any other spec's on the circuit breaker?

 

[TrlcKed_OuT 10+ year member]

no...when i run test tones or sweeps it only last 15 seconds max...normal music all day everyday....just its a scorpion 250amp circuit breaker....i know the amps put out 1200 if not more at only 12 volts....