If my alts 200 amps... fuse size?

[silenkiller 10+ year member]

What size fuses should I be using? I originally was figuring 150 amps for my inline fuse from battery to trunk battery, but that was before the HO alt upgrade. So do I go to 200 then? My distribution blocks can only take a max size of 150 amp fuses, sigh that will be an issue.

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[jrwalte 10+ year member]

I'd go 250 or 300. Your amp (Edit:Alt not amp) could go above the rated amperage of 200.

 

[missinglink 10+ year member]

With a bigger alt you will allow more current to your amps. Although the power will be cleaner with the bigger alt your amp will draw the same. I would go ;

(My rule of thumb)

100amp =1000watts

200amp= 2000 watts

300amp =4000 watts

If your voltage is dropping below 12v these may pop any how.