wiring a second battery

[atlninja82 10+ year member]

hey guys,

i have an optima red top and a kinetic hc2400. optima being my front batt and kinetic in the cab on my truck. well im not sure if i have it wired properly. i just have one wire of 1/0 going from the red top on the positive terminal to the kinetics positive and have them grounded separately. i read somewhere that i have to run a run of 1/0 from negative on one battery to the other one too. whats the difference if i just grounded them separately or is this ok? also ive seen people say they have 2 runs or 3 runs of 1/0. what does that mean? now that i ordered my iraggi 260 amp alt should i run another run of 1/0 on top of it? sorry for the dumb questions.

thanks guys,

-eric

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[rmzsuzuki89 10+ year member]

Multiple runs are for high power draw. And a negetive is not necessarily needed, but won't hurt. But grounding in the back is fine as well as long as it's grounded in a good spot.

 

[Buck 5,000+ posts]

I would run a ground 1/0 to the neg on your battery in the rear.

 

[ahole-ic]

I would run a ground 1/0 to the neg on your battery in the rear.

There's really no reason for this. If you've made sure your amp ground is basically directly connected to the chassis and your big 3 is directly connected to the chassis, your ground is ROBUST. These guys on here think that since the competitors do it with their 10,000 watts drawing 800 amps that their little system that doesn't even come close to half of that needs it too. You will benefit more from a second power run that you will a run of ground all the way back to the batt. The chassis has far less resistance than 1 run of 1/0 or even two for that matter depending on vehicle.

 

[atlninja82 10+ year member]

Multiple runs are for high power draw. And a negetive is not necessarily needed, but won't hurt. But grounding in the back is fine as well as long as it's grounded in a good spot.

ok so should i run another run? im only running a sundown saz 1500.

I would run a ground 1/0 to the neg on your battery in the rear.

alright guess ill do it. drillin those huge holes are a pita.

 

[rmzsuzuki89 10+ year member]

ok so should i run another run? im only running a sundown saz 1500.

It's not absolutely necessary, but it won't hurt.

 

[atlninja82 10+ year member]

so i just run another run of 1/0 on top of the 1/0 already run to my battery? on both terminals im guessing

 

[audiolife 5,000+ posts]

I would run 0 ga pos to pos and another neg to neg with propper fusing. Just makes it more simple than having to check all your grounds.

 

[blabo219 10+ year member]

does it matter if you ground your amp on the 2nd batt neg? or does it have to be a seperate ground on the chasis?

 

[audiolife 5,000+ posts]

I say K.I.S.S. simple complete the circuit.

 

[benzmansl65amg 10+ year member]

1/0 to negative is not needed just good frame ground grind paint and drill down run bolt through and tighten nut on other side.

 

[______ 10+ year member]

Dont run the neg. to the sec. batt there is no point.... I have 2 red tops with diff. grounds no issue. with big 3 done your golden, just make sure that both grounds are clean and solid

 

[atlninja82 10+ year member]

thanks for the quick replies guys.