Surplus aux lights

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Tub
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Surplus aux lights

Post by Tub » Mon Sep 22, 2014 9:03 pm

Scored some sweet surplus lights for the burban. They are (military) 24v. I've wired vehicles before, but only as in rewiring an old 6v system to 12v. I've never had any expierience doing the opposite. I realize I could try to find replacement 12v bulbs. But, just for shits and gigs, what kind of process is it to bump the volts, and run an inline fuse in front of the switch?
"GET TO DA CHOPPAHHHHH!!!"

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raptor
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Re: Surplus aux lights

Post by raptor » Mon Sep 22, 2014 9:31 pm

It is easy just get a dc to dc step up transformer.

Like this:
http://www.ebay.com/itm/12A-250W-DC-Tra ... 232a7b79ea

Still the easiest thing to do is change the light bulbs. The only issue is the size of the wire connecting the light bulbs. By halving the voltage you will require double the amps to achieve the same brightness. Just make sure the wiring is sized sufficiently to take the voltage load.

That said a 55 watt quartz bulb is pretty bright. They require only 5 amps per light @ 12 volts whihc means 14 gauge wiring if the run is less than 20 feet. 12 gauge if you want to be able to run 100 watt bulbs.

http://www.engineeringtoolbox.com/amps- ... -d_730.htm
Last edited by raptor on Mon Sep 22, 2014 9:41 pm, edited 1 time in total.

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Tub
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Favorite Zombie Movies: Night of the Living Dead, Shaun of the Dead, World War Z, Dawn of the Dead...the usual supects.
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Re: Surplus aux lights

Post by Tub » Mon Sep 22, 2014 9:38 pm

That's pretty nifty. Does the wiring gauge have to then also double? From the step up to the light that is. It would run switch, fuse, light?
"GET TO DA CHOPPAHHHHH!!!"

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raptor
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Re: Surplus aux lights

Post by raptor » Mon Sep 22, 2014 9:42 pm

Tub wrote:That's pretty nifty. Does the wiring gauge have to then also double? From the step up to the light that is. It would run switch, fuse, light?
A nifty table

12 volt
http://www.engineeringtoolbox.com/amps- ... -d_730.htm

24 volt
http://www.sunforceproducts.com/Support ... nTable.pdf

Yes it is wired like that but you will have a large selection of 12 volt bulbs vs. fewer choices in 24 volt. Also you will want to mount the transformer as close to the battery as possible and run wiring sufficient to operate the transformer at capacity. The output will be in 24 volt so you use appropriate sized wire for that voltage.

With low voltage DC a larger wire is generally better since any voltage drop is quite evident.

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Tub
Posts: 11
Joined: Sun Jun 01, 2014 10:37 pm
Favorite Zombie Movies: Night of the Living Dead, Shaun of the Dead, World War Z, Dawn of the Dead...the usual supects.
Location: Mid-Michigan
Contact:

Re: Surplus aux lights

Post by Tub » Mon Sep 22, 2014 10:26 pm

Thanks! The only reason I'm asking, is because of the selection of surplus equipment available for vehicles. I'm confident I'm going to run into more of this.
"GET TO DA CHOPPAHHHHH!!!"

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