Winch installation with battery on/off switch (1 Viewer)

[Enigma]

After probably too much reading, I ordered a Blue Sea Systems 3000, HD-Series Heavy Duty On-Off Battery Switch to shut off power from the battery to the new winch. The instructions for the switch describe running two cables from the load to the switch, and two again from the battery to the switch. Any idea why it would need this, what seems like, redundant wiring?

HD-Series Heavy Duty On-Off Battery Switch - Blue Sea Systems

Up to 600 Amps continuous rating for large diesel engines.

www.bluesea.com

http://assets.bluesea.com/files/resources/instructions/6364.pdf

 

[Enigma]

Well they answered half the question..

 

[Enigma]

and fully answered. So was it just me or are those weird and counter intuitive instructions?

 

[Randy88FJ62]

I have an older battery switch OFF, Batt1, Batt2, or both. I use a single wire to the terminals. The wires are huge so I am confident they can handle the load. The switch has held up well for years and sometimes I'm pulling 8 trucks up a snowy hill in succession.

 

[LS13]

and fully answered. So was it just me or are those weird and counter intuitive instructions? View attachment 2457989

Can you use 2AWG battery cable with 3/8" battery terminal with the Blue Sea 3000 ?

 

[Randy88FJ62]

@LS13
Calculate the max load of the winch. Verify the battery switch can handle that load.

Then measure how long the 2 AWG run will be. There are charts showing you the max amps allowed over a length of wire. You need to make sure you won't melt the wire and start a fire.

Only you can calculate this.

 

[LS13]

@LS13
Calculate the max load of the winch. Verify the battery switch can handle that load.

Then measure how long the 2 AWG run will be. There are charts showing you the max amps allowed over a length of wire. You need to make sure you won't melt the wire and start a fire.

Only you can calculate this.

Thank you for the info, the winch manufacturer recommend a 500amp switch and the Blue Sea 3000 can handle 600amp, would this be adequate ?

 

[Randy88FJ62]

I went with zero gauge welding pliable wire from one battery to the other. I think, don't quote me, that I ran 2 gauge from winch to the manual switch since it was such a short run.