Thread: Big fuses
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Old 10-13-2017, 06:36 PM   #13
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,385
Originally Posted by DHeckrotte View Post
............... Current Code/practice is to fuse the battery wiring close to the battery, both positive and negative(!?).
If that is code, I would like to see it in writing.

Fusing the negative lead is bad practice. If a fuse in the negative side of the circuit blows, the circuit will not operate but the entire circuit (including the negative portion on the "hot" side of the blown fuse) will still be hot.

The ABYC requires circuit protection within seven inches of the source with a few exceptions (distance, not protection). It does not require overcurrent protection in engine starting circuits.
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