Negative wire question.

[J31Rob 5,000+ posts]

You do not need to fuse one wire more than once. Current flow is the same throughout the wire. The only reason to use two fuses is if you doubt one will blow, which should not be a major concern.

Ehh..

To be completely honest, you should always fuse between up front, to protect the wire.. & fuse between the battery bank & amp to protect the amp.

 

[mile098 10+ year member]

fuse at EVERY single battery....competitors dont do it cuz thats a cross change and they lose precious volts on that(more resistance) in the cable...but thats not their daily setup, as they take out tha batteries...put a fuse on the positive wire at every battery, imagine if smthg was to cause a short circuit on lets say the mid one or that piece of cable connecting it to the other two in the trunk...and no fuse to burn out..one at the battery in front wont prevent that as the power comes from the batteries in the trunk....hope i didnt tangle this too much

 

[PSturmer 10+ year member]

fuse at EVERY single battery....competitors dont do it cuz thats a cross change and they lose precious volts on that(more resistance) in the cable...but thats not their daily setup, as they take out tha batteries...put a fuse on the positive wire at every battery, imagine if smthg was to cause a short circuit on lets say the mid one or that piece of cable connecting it to the other two in the trunk...and no fuse to burn out..one at the battery in front wont prevent that as the power comes from the batteries in the trunk....hope i didnt tangle this too much

umm no. most of people who run street class drive there comp car daily. my car has 4 runs of unprotected positive wire which is not uncommon. only fusing i have is 2'' from each amp

 

[DarkFox 10+ year member]

You do not need to fuse one wire more than once. Current flow is the same throughout the wire. The only reason to use two fuses is if you doubt one will blow, which should not be a major concern.

Sorry to say but your wrong.

Say you only fuse near the front battery in a system like this, and the + grounds out somewhere in the middle for whatever reason. The battery's in the back will still pump power through the chassis until 1 of 3 things happens:

1. Your car burns down

2. Your rear batteries boil out there acid and/or explode with no fire

3. Your rear batteries some how don't explode, or set your wire on fire, but drain theme self till they are completely dead and worthless

With multiple batteries you NEED to fuse both ends of the cable, as power has potential to come from either side.

 

[Lakota 5,000+ posts]

umm no. most of people who run street class drive there comp car daily. my car has 4 runs of unprotected positive wire which is not uncommon. only fusing i have is 2'' from each amp

Somewhat of the same thing here. I'm only fused at the main battery and at the amp. Didn't even fuse the big 3.

 

[PSturmer 10+ year member]

Somewhat of the same thing here. I'm only fused at the main battery and at the amp. Didn't even fuse the big 3.

my big 2 has no fuse either.

 

[cha0 10+ year member]

wouldnt that be pointless to fuse grounds? i mean there made to be there if theres a big surge of energy and it needs a place to go? i mean this is what happens in retard terms?

 

[PSturmer 10+ year member]

grounds you dont fuse. ever.

 

[ultimate157 5,000+ posts]

You do not need to fuse one wire more than once. Current flow is the same throughout the wire. The only reason to use two fuses is if you doubt one will blow, which should not be a major concern.

Yes you do. If you only fuse under the hood, and the wire somehow shorts in the cabin, then you're going to have a red hot and melting wire under your rug. You will also have your rear batteries heating up real fast and boil/explode.

 

[DarkFox 10+ year member]

Beat you too it, all though it had gotten lost in some other debate they had going on.

You do not need to fuse one wire more than once. Current flow is the same throughout the wire. The only reason to use two fuses is if you doubt one will blow, which should not be a major concern.

Sorry to say but your wrong.

Say you only fuse near the front battery in a system like this, and the + grounds out somewhere in the middle for whatever reason. The battery's in the back will still pump power through the chassis until 1 of 3 things happens:

1. Your car burns down

2. Your rear batteries boil out there acid and/or explode with no fire

3. Your rear batteries some how don't explode, or set your wire on fire, but drain theme self till they are completely dead and worthless

With multiple batteries you NEED to fuse both ends of the cable, as power has potential to come from either side.

 

[fwb_1234 10+ year member]

Yes you do. If you only fuse under the hood, and the wire somehow shorts in the cabin, then you're going to have a red hot and melting wire under your rug. You will also have your rear batteries heating up real fast and boil/explode.

Ah, ok. Sorry, I didn't think of the fact that that the current could run back "up" the wire (forgive my poor vector usage) in a car with a rear battery, if there was a short in the middle.

But I would have fused between the rear batt. bank and the amp for sure, guys.

Thank goodness I have my flame suit with me at all times.

 

[patrick1202 10+ year member]

and running it to the minus on the batt up front calls for the "perfect ground"