FD Battery Relocation

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Oct 30, 2011 | 02:43 AM

#26

dblboinger

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From: DeSoto IL

Quote:

Originally Posted by XLR8

^Because components can still be energized through an alternate ground. However, there is only one positive source while the engine is off.

What????

Oct 30, 2011 | 01:47 PM

#27

FD3S2005

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From: Davie, Florida

i really need to get me one.. i havent had any issues running without it for about almost 2 years. but to be safe thats going to the top of my list.

Oct 30, 2011 | 05:44 PM

#28

XLR8

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From: NJ

Quote:

Originally Posted by TwinCharged RX7

Also, most racing rules require it to be on the power side, does anyone know why?

My response made sense... at least to me.

Oct 30, 2011 | 06:16 PM

#29

TwinCharged RX7

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Sure did, thanks man.

Oct 31, 2011 | 07:49 PM

#30

moconnor

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From: Bay Area, CA

Quote:

Originally Posted by dblboinger

This fuse box is where I am having issues. moconnor - I read your write-up and looked at the photos, but I can't tell out how you secured the fusebox you removed from the battery post. Where/how did you mount it? I have several ideas, but none looks very pleasing to me.

I just used Zip ties on the attached wires. There really is no place to mount a bracket - and the thick wires going into the fuse box are practically 'molded' into their shape, so the box is not really going anywhere.

Mounting the breaker to the positive end in a circuit (as near as possible to the battery terminal) is standard electrical practice in a common ground system - and is, for example, required by racing and marine regulations (at least - my guess is that it is required by many more similar regulations). That is reason enough not to adopt an unusual solution.

Aug 8, 2012 | 03:11 PM

#31

jkstill

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From: Portland OR

Quote:

Originally Posted by TwinCharged RX7

Why did you put it on the ground side, I don't see why there'd be more risk of a short one way vs. the other. Also, most racing rules require it to be on the power side, does anyone know why?

The purposes are different.

Most of us probably install a breaker on the negative side to act as a battery disconnect feature - much simpler than disconnecting the negative battery cable when working on the car.

The power cutoff switch is different, as it's purpose is to cut off all power with the switch. It has to be on the positive side to do this.

If you pull the negative battery cable while the car is running, it will continue running.