fuse rating

[youdoofus]

im going to be cleaning up my wiring in my trunk and am wanting to make sure that im properly fusing my amps. Currently im running a PPI PC275 and will be running a PC250 and i cant find what they should be fused at. Im thinking 40 amps, but......

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[Lbetts818]

Fuses are wire dependant. Best example 1/0 ofc is rated for 300 amps. 1/0 cca is rated at 250a.

 

[youdoofus]

Fuses are wire dependant. Best example 1/0 ofc is rated for 300 amps. 1/0 cca is rated at 250a.

no, i mean the ones that are like a foot from the amp. the powerclasses are externally fused. i think they draw 3o for the 250 and 40 for the 275, but im not sure

 

[BOOMINGRANDPA 5,000+ posts]

no, i mean the ones that are like a foot from the amp. the powerclasses are externally fused. i think they draw 3o for the 250 and 40 for the 275, but im not sure

just do a fused block with a 30 and 40 in it..

 

[Lbetts818]

Yes the fuses within a foot of the amp are wire dependent. The only thing a fuse is for is to protect your wires from a short or thermal failure. Not to save the amps. I mean it will save your amps but that’s not the purpose.

 

[los33 10+ year member]

no, i mean the ones that are like a foot from the amp. the powerclasses are externally fused. i think they draw 3o for the 250 and 40 for the 275, but im not sure

Lol your post dont make sense..
If you want to fuse for the wire then yes even if its the fuse you put a foot away from the amp or battery it goes by the wire rating.

The 275 is actually 35amps

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[youdoofus]

ok, i was thinking about getting this guy here to have the amps fused from the distro

THIS DUDE

 

[youdoofus]

Yes the fuses within a foot of the amp are wire dependent. The only thing a fuse is for is to protect your wires from a short or thermal failure. Not to save the amps. I mean it will save your amps but that’s not the purpose.

the item i linked in my previous post is what im thinking about getting. the PC250 and PC275 only take 8 gauge, so im going to place this as close as possible to the amps

 

[Lbetts818]

It will not let me see the link. If it’s a fused distro block knukomcepts makes some nice ones for sure. If it were me I’d run a run of 1/0 with 250/300a fuses writhing 12-18 inches of each battery/distro block. Then I’d run the 8ga off the block to the amps. 1/0 is probably overkill but for the cost of 4ga I’d spent the extra 1$ a foot on 1/0.

 

[Louisiana_CRX 5,000+ posts]

Most spl guys don’t run fuses due to resistance loss ...as long as everything is run properly with your wiring and cable you don’t need them ..but if you have any doubts at all it’s better to use fuses ...just add up the fuse value on your amps and use that as your main fuse value