Installing battery disconnect

I work on all types of large trucks, all I've seen have the shutoff on the positive side, near battery as mentioned.
Me personally, I would put it on the ground side, just always been taught ground off first and on last.
 
itslow said:
Install on the hot side as close to the battery as possible. You want to minimize the length of the hot lead between the battery and switch to limit the potential length of wire that can short when the switch is in the "off" position.

Not that anyone here is racing their old Fords, but NHRA rules require the master disconnect switch to be on the positive lead, as well as kill all electrical functions. The 2nd part requires some additional wiring beyond just sticking a big honkin' switch in the battery cable.
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That's the stupidest thing I have heard lately. I'm not really surprised though from the NHRA.
I have raced both of my cars (one national champ) under rules that are a lot stiffer than the NHRA and the ground lead is specified for both the manual and the inertia switch.
 
Pete said:
That's the stupidest thing I have heard lately. I'm not really surprised though from the NHRA.
I have raced both of my cars (one national champ) under rules that are a lot stiffer than the NHRA and the ground lead is specified for both the manual and the inertia switch.
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I see we've found the Ford Barn ******* of the day. Congrats to you!

How about actually contributing to the thread and provide an explanation as to why that's the stupidest thing you've heard lately?

Which racing associations are you running in that require the disconnect be in the ground lead?
 
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