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cost -- why insulate wires when air is good enuff.
here (PG&E land) the 220 lines (to the houses) are wrapped around the
uninsulated ground (return when load is unbalanced). The ground (steel,
I think) serves also as the support for the low strength Cu or Al.
bc
p.s. if your referring to my story, they were multi-kV. lines. I doubt,
except in inclement weather, 440 V. lines would electrocute a bird
"Carl E. Mungan" wrote:
Okay, time for what's probably a really dumb question. Why would a
bird touching two lines get electrocuted: Isn't there any plastic
insulation on ordinary electrical power lines? (I'm not talking about