5 ms·
Oh, that is completely not true for commercial AC power transmission -- just look up at a big power pylon and see the multiple power conductors per phase. See
by davepage 12y ago
Oh, that is completely not true for commercial AC power transmission -- just look up at a big power pylon and see the multiple power conductors per phase.
See the pretty blue picture:
http://en.wikipedia.org/wiki/Skin_effect http://en.wikipedia.org/wiki/Skin_effect
Skin effect in copper is about 9mm at 60Hz
- coryrc 12y agoThat's part of the reason those power lines are steel-cored with copper jackets; the other reason being strength, of course.
- votingprawn 12y agoThey're Aluminium over a steel core, not copper. A copper over steel version would be significantly heavier.
- coryrc 12y agoheadsmack yes, of course.
- dfox 12y agoI assumed that skin depth at 50/60Hz is on the order of 20mm and that 40mm diameter conductor is not entirely practical to install on pylons (or generally in longer lengths than few meters), obviously I was slightly off in that estimate.