I keep on with my little project concerning very low cost power distribution.
I think some simple overhead cable is the best distribution to each house. Bare wires seem rather unsafe and are exposed to theft of electricity.
The cheapeast type of cable I can think if would be something similar to an American zip-cord with alumin(i)um conductors. Has anyone seen something like #14 or 2.5 mm2 Al for outdoor use? I can't find anything on the net.
(Someone is likely to bring up the possible fire hazard: I think that can be avoided by using stranded wires, suitable terminations and a trained workforce. The wiring inside the house will still have to be Cu, of course.)
Yup. I just read about 20W services somewhere in south east Asia. Yes, twenty watts! Enough to run one short flourescent tube.
The difference in cost between copper and aluminium is probably small and with copper I could go one size smaller. However I wonder what happens to it mechanically when the wind gets hold of the cable. A steel cable would be great from a mechanical perspective, but it's that voltage drop thing... I suppose I have to suspend the cable with a steel wire.
#139357 - 11/04/0302:39 PMRe: Cheapest possible cable?
Hey, that's what our NYIF looks like, only it's light grey! And of course copper. Wouldn't the voltage drop be a problem anyway with such thin wires? How long do you plan on making those runs? Steel wire definitely isn't a good idea. I read somewhere about a trolley bus service in Vienna (1940ies), they fed 750V into the wire and on the other end they had about 300... with only 1 bus... the service never opened to the public.
#139359 - 11/04/0305:22 PMRe: Cheapest possible cable?