Tutorial: car battery kill switch (cutoff negative side better?, read below) no dead car DIY cutoff

Many sources suggest cutting off the negative to eliminate a short of the switch cables but with a sealed plastic case shorting will be tough. The NHRA mandates cutting off the positive side. I have the positive cut off on 2 motorcycles with no problems over 10 years. Even so, post 28 in the link below convinces me to cutoff the negative cable.
www.v8buick.co...
/ is_this_safe_installed...
s.click.aliexp...
s.click.aliexp...
#car #battery #killswitch

[@farerse]

what is the NHRA's reason for cutting of the positive side when doing this?

[@SOLDOZER]

Battery cutoff switches always go on the negative

[@donibintangk.9537]

You should cut off the negative wire, not positive.
Its too Dangerous if the positive cable or kill switch post short to body

[@smallmodelcollector]

Thanks, that's good info. My concern was if someone tries to start the car it will blow a fuse. The way it is now that can't happen. The switch is in a bolted together plastic box so unless the box shatters it can't short. Still; after more research I switched to the negative. I'll do a follow up vid and take this down later so no one catches their car on fire.

[@JohnnyPerth]

Won’t that box rattle on bumpy roads ?

[@smallmodelcollector]

Possible; I might have to pad it and strap it tight to something.

[@chakra2guru]