sk 2500.1 Dual Input Fusing

[SMZ2]

I will be using tool maker dual 1/0 inputs on this amp. I see it said in the manual 250 amp fuse but if I was running the dual inputs would I split that number or do 2 250 amp fuses. Please help!

[Swordlordboy1234]

I did 2 250amp fuses. Because your fusing to protect the wire. Say one wire shorts out... My wire is good for 250+. SHCA 1/0 CCA. Your not fusing to protect from power (splitting the amp rating) your fusing to protect the wire from carrying too much or shorting

[skaraudio]

It wouldn't hurt to fuse both power inputs, I would recommend using (2) 250 Amp Fuses

[SMZ2]

Would it be any different if it was strapping two 2500?

[audiofanaticz]

Want to fuse it correctly? Then DO NOT fuse an amp that requires 250 amps of fusing at 500 amps!!!

Since your using dual input adapters fuse each wire.

However since the max amperage draw of the amp is rated at 250 amps, you only need to put a 125amp fuse on each wire holder.

Fuses are for protecting the power wire, If an amp is going to blow, its going to blow with or without a fuse.

No since you are fusing per the wire requirements, and the amps requirements are 250amps, fusing it at 500 amps is just plan stupid.

Why you maybe wondering?

Well like i said, the fuse protects the wiring, nothing more. So if an issue was to arise and a short in your power wire happended, that short is going to be happening for a much longer time, since it takes longer to blow a 250amp fuse versus 150 amp fuse. That amount in delay between the fuse sizes can save your car from having a fire, to possibly your rubber protective casing on your wire melting and making that piece of wire garbage.

I also want to mention that all fuses are not created equal, even so 2 fuses from the same manufacture are not equal.

You may end up having 1 250amp fuse that will blow after it has had 275amps of current feed threw it for 10seconds.

While your other 250amp fuse may not blow until after it has had 305amps of current feed threw it for 40 seconds.

Basically meaning, if your fuse is 250 amps, and you put 251 amps threw it for 20 hours, that fuse WILL NOT blow.

They are a slow blow type of fuse, so over fusing is VERY DANGERIOUS.

For example from BCAE1.com

A 20 amp fuse may pass 40 amps of current for as long as 5 minutes before blowing although it probably wouldn't take a full 5 minutes to blow.

For more information: http://www.bcae1.com/fuses.htm

Edit, as for it being any different then strapping 2 2500 amps, yes its different.

Those 2 2500 amps would need 500amps of fusing to safely satisfy their current draw.

A single 2500 amp would stilll ony need 250 amps of fusing to safely satisfy its current draw. You could have adapters made for Four 1/0 power wires, but then you would only want to put a 62.5amp fuse on each power wire.

Also many people think that if they use a 500amp fusing, the amp will get more power because its double the size of fusing, but that is not true and 500 amps of fusing will not give the amp more power then a single 250 amp fuse.

Same can go for dual inputs. Unless your strictly going for numbers, and your car is setup to run off 1 battery with the car off during its burps, that amp is not going to gain much if any performance having a 2nd power wire stuck inside the terminal. But they look cool and that right there is a selling point to me and many others

The average 1/0 can carry 300amps of current for 17-20 feet saftly, you cut that wire in half, it can now handle almost double the rating, and the shorter the wire is that rating just keeps getting larger and larger.

Edited July 16, 2013 by Audiofanaticz

[VomitUrSoul]

Want to fuse it correctly? Then DO NOT fuse an amp that requires 250 amps of fusing at 500 amps!!!

Since your using dual input adapters fuse each wire.

However since the max amperage draw of the amp is rated at 250 amps, you only need to put a 125amp fuse on each wire holder.

Fuses are for protecting the power wire, If an amp is going to blow, its going to blow with or without a fuse.

No since you are fusing per the wire requirements, and the amps requirements are 250amps, fusing it at 500 amps is just plan stupid.

Why you maybe wondering?

Well like i said, the fuse protects the wiring, nothing more. So if an issue was to arise and a short in your power wire happended, that short is going to be happening for a much longer time, since it takes longer to blow a 250amp fuse versus 150 amp fuse. That amount in delay between the fuse sizes can save your car from having a fire, to possibly your rubber protective casing on your wire melting and making that piece of wire garbage.

I also want to mention that all fuses are not created equal, even so 2 fuses from the same manufacture are not equal.

You may end up having 1 250amp fuse that will blow after it has had 275amps of current feed threw it for 10seconds.

While your other 250amp fuse may not blow until after it has had 305amps of current feed threw it for 40 seconds.

Basically meaning, if your fuse is 250 amps, and you put 251 amps threw it for 20 hours, that fuse WILL NOT blow.

They are a slow blow type of fuse, so over fusing is VERY DANGERIOUS.

For example from BCAE1.com

A 20 amp fuse may pass 40 amps of current for as long as 5 minutes before blowing although it probably wouldn't take a full 5 minutes to blow.a 20 amp fuse may pass 40 amps of current for as long as 5 minutes before blowing although it probably wouldn't take a full 5 minutes to blow.

For more information: http://www.bcae1.com/fuses.htm

Thanks, this is some useful information. I'm going to quote this for the thread I made the other day asking a similar question: http://www.stevemeadedesigns.com/board/topic/172097-dual-inputs-for-a-t2500bd/

[SnowDrifter]

If the amp requires 250a of fusing, then use 250a worth of fuses.

Get a pair of 125a fuses and you should be good to go