Big 3 Alternator to Batt?

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t0mmyr

Copper - Posts: 55

Joined: March 26, 2006

Location: United States

Posted: April 23, 2006 at 5:40 PM / IP Logged

I'm doing the big 3 right now, my question is, should I fuse the extra cable i'm running from my alternator direct to my battery? the positive output on my alternator shows B, is that correct? or should i run a thick wire with no fuse to the + battery?

supradude

Silver - Posts: 915

Joined: September 21, 2004

Location: South Carolina, United States

Posted: April 23, 2006 at 8:45 PM / IP Logged

Fuse it close to the battery.

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stevdart

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Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: April 23, 2006 at 8:47 PM / IP Logged

The consideration for this is the location of the wire. Of course, being a power wire means it should have a fuse near the battery just like the power wire that runs into and through the car. But the location in the front of the car, not being hidden under seats and passing through firewalls, allows the option of leaving it unfused. There will be some who fuse it and some who don't.

EDIT: I agree with supradude and would fuse it as well.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

t0mmyr

Copper - Posts: 55

Joined: March 26, 2006

Location: United States

Posted: April 23, 2006 at 11:20 PM / IP Logged

i ended up putting a 140amp breaker right near the alternator, then about a 3 foot run of cable to the battery, i feel safe, all electrical turned out nicely, now i just have to install the 4 components, 2 amps, rcas, headunit...and 1/0 cable to the trunk...sigh...looks like ill be busy next couple days off in the coming weeks

stevdart

Platinum - Posts: 5,816

Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: April 23, 2006 at 11:27 PM / IP Logged

Battery. The battery is the power source because it stores. If the wire is shorted it's the battery that will unload its store of amperage. The length of wire between the battery and the breaker is unprotected.

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

t0mmyr

Copper - Posts: 55

Joined: March 26, 2006

Location: United States

Posted: April 24, 2006 at 1:38 PM / IP Logged

so should i put an additional fuse on the battery side of the compartment? i don't have another 140 fuse or breaker, i think all i have is an 80 agu

audiocableguy

Copper - Posts: 630

Joined: January 27, 2003

Location: Idaho, United States

Posted: April 24, 2006 at 2:55 PM / IP Logged

If you were to fuse the lead between the Alternator and the Battery, wouldn't damage result to the Alternator if the circuit opened with the vehicle running? I'm sure a direct short isn't good either.

t0mmyr

Copper - Posts: 55

Joined: March 26, 2006

Location: United States

Posted: April 27, 2006 at 1:32 AM / IP Logged

well i have the fuse open right now, because it's actually an added wire to the alternator to battery, i left the stock wiring in place and just added on top of it

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Big 3 Alternator to Batt?

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