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Battery Fuses
09-JAN-2011

Battery Fuses

I am a strong believer in over current protection or fusing of battery banks, even start banks on smaller axillary engines, despite this not being a requirement to meet in ABYC E-11.


This product is called a battery terminal fuse.. These fuses are meant to protect the wiring from dead shorts and are easy to install. I use the double version for the bank and the alternator wire. As always choose your fuses based on the wire gauge you are protecting.


Every positive wire connected to a batter should be fused within 7" of the battery or as close as you can get. This includes inverters, alternators, battery chargers, bilge pumps or stereo memory wires.


Interestingly enough the black fuse holder for this Victron battery monitor is 7" from the ring terminal for the battery post.

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Dan 27-Jan-2017 11:42
Greetings,

I am about to pull the trigger on a dual terminal fuse block because I would like to wire the alternator to the house bank as well. Your photo above shows both a 300a and a 150a fuse on the same block which is rated for 300a total. In reading the Blue Sea literature on this dual block, they are clear to point out that the total of the fuses should not exceed 300a. Am I reading this incorrectly?
Also, do you have a DIY page detailing the wiring of the alternator to the house bank?

Thanks in advance, I absolutely love your instructions!


Dan
s/v Gypsy Soul
Pasadena, MD