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Ground

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=10321
Printed Date: May 09, 2025 at 8:47 PM


Topic: Ground

Posted By: bizzy818
Subject: Ground
Date Posted: March 02, 2003 at 6:25 PM

Why do they say its not good to give ground to sometihng directly from the battery? Why does the battery has 2 wires going from ground one goes to a bolt and the other one to the alternator i guess. thnx



Replies:

Posted By: bberman1
Date Posted: March 02, 2003 at 8:05 PM

When current flows through any device / wire with resistance, there will be a voltage drop from one end of the wire to the other. So you want the shortest length possible. The rule of thumb is to keep the ground under 18 inches.




Posted By: bberman1
Date Posted: March 02, 2003 at 8:09 PM

Also in a lot of high end charging system upgrades for car audio. The ground goes directly from the alternator to the chassis then to the battery.





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