William,
It is interesting that the 2008 code also has the "utility-interactive"
typo. None the less, it is appropriate to put photovoltaic circuits in
metal conduit for off grid systems. The risk to fire fighters is
nearly the same in both cases.
Kent Osterberg
Blue Mountain Solar
William Miller wrote:
Dick, colleagues:
I was at a seminar in which John Wiles lectured building officials and
installing contractors. At one point I asked about 690.31(E)
(2005). Mr. Wiles glibly commented that the restriction of that
section to utility-interactive systems was a "typo" in the 2005
edition. There were many officials present that inspect and
plan-check my work. Based on Mr. Wiles remark, several inspectors
have been trying to apply 690.31(E) to off-grid systems. This has
cost me time, money and aggravation.
Mr. Wiles apparently does not know the responsibility he has when he
makes off-hand remarks. His opinion that a given passage in the
code is not correct does not negate what is in black and white.
With all due respect, I wish he would be a bit more temperate in his
remarks.
Sincerely,
William Miller
PS: Mr. Wiles showed slides of his home installation. It may
be a code complaint installation, but there is nothing pretty about the
workmanship. I think a thorough familiarity with the code does not
alone comprise a complete education on PV installation.
Wm
At 10:07 AM 6/7/2009, you wrote:
According
to John Wiles, the code
making panel for 2008 Article 690 was
disbanded
by the NFPA because it, "violated NEC code developement procedures
and because
of other issues." Doesn't leave one with much confidence in their
work.
Dick Ratico
Solarwind Electric
Bradford, VT
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