| Charles Perry 2006-04-15, 12:21 pm |
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"SQLit" <sqlit@qwest.net> wrote in message
news:zzV%f.32$r04.1782@news.uswest.net...
>
> "Beachcomber" <invalid@notreal.none> wrote in message
> news:443f42f8.386640@news.verizon.net...
> http://www.mikeholt.com/documents/s...Final5-3-03.pdf
>
> I have not worked on distribution in a few years. I do not remember ANY
> medium voltage system ( less than 69kv) that has a neutral. 3 hots and a
> ground but not a neutral.
>
>
??
The system you see hanging on most three phase poles in the US had three
phase conductors and a neutral (grounded conductor). Each piece of medium
voltage equipment, along with many poles (often every third one) in areas
without a lot of medium voltage equipment, will have a ground (grounding
conductor).
As for Mike Holts support of a 5 wire system, he has gone overboard with his
stray voltage tirades. He often equates stray voltage (very low voltages
that are annoying but do not kill) with unintended energized metal objects
(which can and do kill). One has NOTHING to do with the other. An
unintended energized metal object is energized by a power source (such as a
street light circuit) and has the capability of killing someone who comes in
contact, such as the woman walking her dog in New York City recently. Stray
voltage, on the other hand, is usually on the order of a few volts and can
cause an unsettling shock, but not a damaging one.
I have a lot of respect for Mike's knowledge of the code and the reasons for
things in the code, but on this issue he has missed the boat completely.
Charles Perry P.E.
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