fuse size battery to alt

[Lets Get It 10+ year member]

What is the max size fuse to use for battery pos to alt in the big 3 using 4 guage? the alt is 100a

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[Skip01 5,000+ posts]

I never used one in any of my cars....but i guess a 150a outta do

 

[Lets Get It 10+ year member]

i was told it was very important to fuse that wire. is that true?

 

[SPL Blazer 10+ year member]

You don't have to, but it's up to you. If you want to spend the money on a fuse and holder make sure you use the largest fuse for that size wire.

 

[18inchjeepin 10+ year member]

125-150 amps max for 4 awg

 

[Ignatowski 5,000+ posts]

I never used one in any of my cars....but i guess a 150a outta do

x2