...current-limiting devices....
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.
