Re: Moving battery: cable sizing, grounding ?'s
- From: dnoyeB <Fake@xxxxxxxxxxxxxxxxx>
- Date: Fri, 10 Feb 2006 08:57:57 -0500
Jim wrote:
I have a typical nose heavy compact wagon and want to move the battery from the engine compartment, to the rear of the vehicle. I have two tech details to work out.
1. What size of batt cable to use. I will be using tinned marine grade wire, from Ancor Marine. The run will be no more than 15' long. Engine size is 2.5 litre, alternator is 60 amp.
Your best bet will be running multiple wires. 1 to the starter, 1 to the fuse panel under the hood. depends on the year of your vehicle. Also you will need a good strong wire to the alternator since that is very very important for charging your battery without loosing volts and efficiency. Of course if you ave room, run the 1-2 jumbo wires back to the former battery location, thats simplest.
The best is to move the whole fuse panel when you move the battery, but I don't know the car to say how well/easy this will be.
Without fusing you increase the fire hazard of your vehicle. Will you run these wires under the carpet in the car? I don't think there is any inobtrusive place to run these wires.
2. Whether to run the ground from the battery post all the way back to the front of the car, or just ground to the body somewhere near the battery, or ground to body near battery and also run a smaller gage ground all the way forward.
Didnt tell us the car type or if its truck, unibody, etc. I would say look at the rear lights and see if they are grounded to frame or to wire runnign back to front of car. I really need to know the grounding strategy of the car to give a solid easy answer. without that i have to recommend treating the ground just like the B+ sans the fuses. Do not ground the battery at the rear. It could work or you could end up with ground loop issues in different systems. Safest way is to stick to existing architecture and simply compensate for voltage drop by using multiple wires.
In case anyone is concerned about fumes from the battery, I will be using a battery that has provisions for adding a vent hose.
Battery should not be in passenger compartment. Maybe you want to give more reasons why your doing this and we can give more options.
Jim
--
Thank you,
"Then said I, Wisdom [is] better than strength: nevertheless the poor man's wisdom [is] despised, and his words are not heard." Ecclesiastes 9:16
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