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That Guy · 05-21-2003, 10:25 AM

It's to prevent the hydrogen cloud from exploding when jumping the dead battery. The cables on the end of the live battery need to contact both posts, but the dead end needs to contact the positive post and a ground of the car (engine block, frame, etc) to prevent arcing.

05-21-2003, 10:25 AM	#3
That Guy He who reads, sometimes writes. Join Date: Sep 2001 Location: at the keyboard Posts: 791	It's to prevent the hydrogen cloud from exploding when jumping the dead battery. The cables on the end of the live battery need to contact both posts, but the dead end needs to contact the positive post and a ground of the car (engine block, frame, etc) to prevent arcing.