Melted Fuse?!?!

[notoriousroc1 10+ year member]

Problem is I noticed that the fuse on my 1/0 gauge going towards my battery has half of the plastic melted (but only on the side of the fuse facing the battery). My setup is as follows:

Stockish battery

200A EA Alt

Rockford T20001bd on Kicker 1/0 gauge (100A fuse on wire)

Rockford P400.4 on Rockford 8 gauge (60A fuse on wire)

T20001bd running to Audioque HDC312 at 1ohm

BIG2 done (need to do Alt + to Batt +)

I know my fuse on 1/0 gauge is way too small (the T20001bd has an internal fuse of 250A), but why would one half of my 100A fuse be melted? Doesn't make any sense. Again, its specifically the side of the fuse facing the battery, the other leg of the fuse (facing the amp) is just fine.

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[Bob Saget]

Maybe it's pulling more amperage than the fuse is rated for? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[SicAudio 5,000+ posts]

Problem is I noticed that the fuse on my 1/0 gauge going towards my battery has half of the plastic melted (but only on the side of the fuse facing the battery). My setup is as follows:
Stockish battery

200A EA Alt

Rockford T20001bd on Kicker 1/0 gauge (100A fuse on wire)Rockford P400.4 on Rockford 8 gauge (60A fuse on wire)

T20001bd running to Audioque HDC312 at 1ohm

BIG2 done (need to do Alt + to Batt +)

I know my fuse on 1/0 gauge is way too small (the T20001bd has an internal fuse of 250A), but why would one half of my 100A fuse be melted? Doesn't make any sense. Again, its specifically the side of the fuse facing the battery, the other leg of the fuse (facing the amp) is just fine.

how does it not make sense? you are trying to draw 250 amps thru a 100 amp device.....

 

[whitedragon551 5,000+ posts]

Problem is I noticed that the fuse on my 1/0 gauge going towards my battery has half of the plastic melted (but only on the side of the fuse facing the battery). My setup is as follows:
Stockish battery

200A EA Alt

Rockford T20001bd on Kicker 1/0 gauge (100A fuse on wire)

Rockford P400.4 on Rockford 8 gauge (60A fuse on wire)

T20001bd running to Audioque HDC312 at 1ohm

BIG2 done (need to do Alt + to Batt +)

I know my fuse on 1/0 gauge is way too small (the T20001bd has an internal fuse of 250A), but why would one half of my 100A fuse be melted? Doesn't make any sense. Again, its specifically the side of the fuse facing the battery, the other leg of the fuse (facing the amp) is just fine.

Makes perfect sense.

 

[kraudio12 10+ year member]

In otherwords your amp is pulling to much power from your alt and due to the heat from the electircity traveling thru your 0g to your fuse it melted

 

[SicAudio 5,000+ posts]

In otherwords your amp is pulling to much power from your alt and due to the heat from the electircity traveling thru your 0g to your fuse it melted

not quite...

the alt is irrelevant here... it is the fuse and only the fuse that is the issue here...

250A of current trying to pass thru a 100a fuse...do the math //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif...

 

[bubbagumper6 5,000+ posts]

lulz ITT

 

[notoriousroc1 10+ year member]

Understood. I don't have the amp turned up all the way, and I didn't have this problem running it at 3ohms on my W7...thats the reason why I asked.

 

[benzmansl65amg 10+ year member]

Heat

 

[dragnix 5,000+ posts]

Understood. I don't have the amp turned up all the way, and I didn't have this problem running it at 3ohms on my W7...thats the reason why I asked.

possibly because the the higher ohm load meant less power produced by the amp, therefore less amp draw. If you actually ran the same amount of power then as you are now, I'm sure that w7 would've melted along with the fuse.

 

[notoriousroc1 10+ year member]

possibly because the the higher ohm load meant less power produced by the amp, therefore less amp draw. If you actually ran the same amount of power then as you are now, I'm sure that w7 would've melted along with the fuse.

Melted due to.....clipping??? Would an amp clip early due to low voltage?

 

[SicAudio 5,000+ posts]

because you woulda been pushing 2500 rms to a sub that can only take 1500 on a good day...

 

[rrob69ewf 10+ year member]

I am truly surprised the fuse has not blown. i would suggest buying better fuses. if your pulling that kind of amperage through that fuse it should have blown before the plastic melted. the fuse is designed to handle up too 100amps not until the plastic melts off either side. The fuses job is too protect your wire from point a to point b. it doesn't sound like its doing its job.

 

[SicAudio 5,000+ posts]

I am betting it is a MAXI fuse and they are horrible to begin with as mainline fuses because of the cheap holders ( prolly a Scoche from walmart.... )

 

[rrob69ewf 10+ year member]

ok now this has been bugging me lol. sicaudio is probably correct in the cheap holder. the only other thing i could think of was a loose fitting fuse on the battery side arcing in the fuse holder creating a crap load of heat. This could explain why the fuse never blew. You might not be pulling your 100 amps. a loose connection could easily do this. check the fuse holder