On 04/11/18 06:45, Paul Allen wrote:
On Sat, Nov 3, 2018 at 7:34 PM Mateusz Konieczny
<matkoni...@tutanota.com <mailto:matkoni...@tutanota.com>> wrote:
Thanks! It was intended to be about insulation.
It now makes a lot more sense. However, the word "isolated" is
present twice in the rationale.
You probably ought to mention something that was brought up on this
list: that some power
lines have a cladding which is not considered to be an electrical
insulator. It is unlikely most
mappers could tell the difference.
Yes, there are insulated cables. They're present on minor power lines
for local distribution (they
run along streets with feeds to houses along the street) near me. At
some points the line
between poles is a single insulated cable and at other points along
the same street it switches
to four, physically-separated, uninsulated conductors. It appears to
me that the uninsulated
stretches are older than the insulated ones and that as repairs become
necessary they change
to insulated cable. I suspect that on anything other than this type
of local distribution any covering
around the wire is cladding rather than insulation.
This may be true for local low voltage distribution in your area.
In my residential area low voltage distribution runs insulated from the
power pole to the residences, but uninsulated from power pole to power
pole.
-----------------
High voltage (10s if not 100s of kilo volts) run uninsulated here and
I'd think that would be true anywhere.
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