battery cutoff - is 300 amp enough?

[Mike82ndABN]

I installed one of these guys on the back of the battery compartment, 300 amp rated. Is 300 amp enough?

 

[tage]

Is that 300 amp at 12v or 24v.

 

[Mike82ndABN]

good question, it just said 300 amp on the package, i would think that is probably at 12v though.

back of package says it is ideal for farm, marine, and motorsport 12/24v

 

[tage]

Hmm if it's 300 12v then it's half that at 24 volt

 

[Mike82ndABN]

Ok gotcha. Any idea what amp rating would be sufficient? Thanks.

 

[Happyland1410]

I used a lockable switch from Flaming River that is rated for 250 amps continuous and 2500 amps for 5 seconds. It was not cheap but I am confident it can handle anything my Deuce throws at it.

http://www.flamingriver.com/index.php/products/c0015/s0005/FR1005

Here is a post showing how I installed mine:
http://www.steelsoldiers.com/showthread.php?2061-Battery-cutoff-switch&p=940649&viewfull=1#post940649

Here is another thread with a lot of good information:
http://www.steelsoldiers.com/showthread.php?113084-Battery-Disconnect-Type

 

[defenzebrent]

looks like the shutoff my mechanic put on my M925 along with 4 new Interstate 6TL's and it has worked flawlessly for 18 months....hope it is OK
Brent

 

[DatGuyC]

Hmm if it's 300 12v then it's half that at 24 volt

shouldn't it be double?

 

[steelandcanvas]

shouldn't it be double?

No.

 

[Keith_J]

Had one fail at less than 100 amp and 28 volt. Voltage doesn't matter if you don't make or break under full load. Current is Current when made. THere are better switches.

 

[tage]

^^
Yep voltage does not kill them, the amps do.

 

[Mike82ndABN]

Had one fail at less than 100 amp and 28 volt. Voltage doesn't matter if you don't make or break under full load. Current is Current when made. THere are better switches.

If this is the same KeithJ from another popular board, then I know you know your stuff
x87

 

[Keith_J]

Higher voltage will arc contacts if you try to break it under load. I am also using a relay rated for 400 amps at 12 volts AND breaking under the same load which failed the switch. No issues yet. This is for the 28 volt, 80 amp cabin air conditioning system in my 1028. The relay controls the compressor motor. It cycles a bunch.

 

[KansasBobcat]

Check with "Those Military Guys" vendor on SS. Have used their switches on M998 and M151. These are designed for 2 1/2 tons and 5 tons, I believe.

 

[Keith_J]

If this is the same KeithJ from another popular board, then I know you know your stuff
x87

You found me

Yes, in my system using both disconnect switch and relay, the disconnect is the same as pictured (low quality) and the relay a very high quality Trombetta of domestic origin.