Wait exactly what fuse size for power wire?

[luis_88 10+ year member]

running 17ft of 0g to my aq1200d and 17ft 4g to my sax125.2, been told that the fuse size for the power wire must match how many amps your amps have ( aq1200d;3x40a fuses = 120) but have been also told to divide your rms by 12, so 100a?

Recommended Power and Ground Cable Sizes & Speaker Wire Size and Length

^^^^according to this chart it says 170a fuse.

Click to read more...

 

[jrdnhsnbrg 10+ year member]

If you're doing seperate runs of power wire for each amp they will have to be fused at different amperages due to the size difference. Fuse the 0ga at 200a and the 4ga at 100a and call it a day

 

[luis_88 10+ year member]

If you're doing seperate runs of power wire for each amp they will have to be fused at different amperages due to the size difference. Fuse the 0ga at 200a and the 4ga at 100a and call it a day

how were you able to calculate the fuse size ? just for future reference. I have had it run on 150a fuse but the wire that goes to the battery up until the fuse is very burnt and part of the fuse seems to be almost melted, not sure if its heat or not but it still plays soooo //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

 

[Full Tilt 10+ year member]

No, the proper thing to do would be to fuse by the rating of the wire. For example, my runs of 1/0 CCA are rated at 250A. So, the proper fusing would be 250A. OP, you'll need to find out the ratings of your wire and fuse accordingly.

 

[jrdnhsnbrg 10+ year member]

how were you able to calculate the fuse size ? just for future reference. I have had it run on 150a fuse but the wire that goes to the battery up until the fuse is very burnt and part of the fuse seems to be almost melted, not sure if its heat or not but it still plays soooo //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

That's just a personal rule of thumb, I prefer to fuse lower than the wire can technically carry but more than the amp is rated to pull that way it should only blow if something has gone wrong, like a short. I'd rather burn out a fuse than a wire.

 

[luis_88 10+ year member]

so your saying use the amp that comes with the amp kit? have the audio technical 0g ofc and 4g ofc kit.

 

[jrdnhsnbrg 10+ year member]

so your saying use the amp that comes with the amp kit? have the audio technical 0g ofc and 4g ofc kit.

Yeah just use the fuses that come with it then

 

[luis_88 10+ year member]

That's just a personal rule of thumb, I prefer to fuse lower than the wire can technically carry but more than the amp is rated to pull that way it should only blow if something has gone wrong, like a short. I'd rather burn out a fuse than a wire.

could this be the reason my wire from battery to the fuse is burnt?

 

[jrdnhsnbrg 10+ year member]

could this be the reason my wire from battery to the fuse is burnt?

Possibly?

 

[luis_88 10+ year member]

I think its because I have the 4g to the aq1200d //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[jrdnhsnbrg 10+ year member]

I think its because I have the 4g to the aq1200d //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

Yeah you need much bigger wire than that.