[UK-CONTEST] 12v down a long run of cable

[Paul_group]

James Thresher wrote:
> I bit off topic, but hopefully someone can assist.
> 
> I need to run 12V (no more than a couple of amps) approx 40-45 meters, I am currently using some spare CAT-5 cable I had (Not ideal i know), but i am seeing too much voltage drop at the other end.
> 
> Options are using larger conductor cable or splitting it down multiple runs (I've tried using 4 of the Cat-5 conductors per side of the 12v and that hasn't helped) does anyone have any suggestions? Or am i fighting a losing battle and should just look at running mains AC and put in a local PSU.
> 


It rather depends what you are operating at the end of this cable run, 
what regulation do you need? if you are operating relays  etc you might 
be able to raise the voltage a bit to accommodate the volts drop, you 
might want to send 24v down the cable and regulate at the far end..

Measure the loop resistance of a pair of conductors and can you supply 
more detail of what you are trying to do?

-- 
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com