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Author
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Topic: Blowing 150 amp fuse ( battery relocated )
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BayAreaNotch
New Member
Member # 12248
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posted
 
 
I recently did a battery relocation on my notch. I ran a stranded 0/2 awg welding wire from the solenoid to the trunk with an inline 150 amp fuse in between. I went to get the car washed and forgot to turn off my fan. Its a manual fan with toggle switch. (Still need to get into habit) I tried turning the car on. It cranked over a bit and then blew the 150 amp fuse. I replaced the fuse and drove it for a while to charge the battery up a bit. I let it sit for about an hour and when trying to turn it on it cranked over like a low battery and blew the 150 amp fuse again.
I am running a 3G alternator. Will i need a higher rating fuse because of the 3G alternator.? Maybe 200 amp? The car turned on no problem and never blew the fuse until the battery went low. Any suggestions?
Posts: 4 | From: Vallejo | Registered: Aug 2012
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wilit
Mustang Messiah
Member # 3367
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posted
Starters surge at 200A-250A with a constant draw of 125A-150A. Also, you need to use a circuit breaker, not a fuse. You typically want to size a fuse/breaker so that it has a 20% reserve. So in this case, with a 250A surge load, you'd want to probably go with a 300A breaker.
[ 2016-07-09, 10:17 PM: Message edited by: wilit ]
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"If a man hasn't found something worth dying for, he isn't fit to live." - Martin Luther King Jr.
Posts: 4793 | From: 37.78514° North 122.40100° West | Registered: Oct 2003
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BayAreaNotch
New Member
Member # 12248
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posted
quote:
Originally posted by wilit:
Starters surge at 200A-250A with a constant draw of 125A-150A. Also, you need to use a circuit breaker, not a fuse. You typically want to size a fuse/breaker so that it has a 20% reserve. So in this case, with a 250A surge load, you'd want to probably go with a 300A breaker.
Sounds good. I will be on the look out for a 300 amp circuit breaker. Im not quite sure I've seen those before. Do they sell them at any auto store? So a 300 amp breaker will pop if I have a short on the positive wire some where in the body?
Posts: 4 | From: Vallejo | Registered: Aug 2012
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89_Faleen
¯
Member # 10728
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posted
Go to any audio shop they should have them in stock.
Posts: 275 | Registered: Mar 2011
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