[RE-wrenches] MC Cable for DC runs

[William Miller]

Bill:

Thank you very much for this reply.  Mr. Wiles came to our town a few years
ago to lecture to installers and building officials.  I mean no disrespect
to Mr. Wiles, but when he spoke he did not make a clear distinction between
his opinion and the official language of the code.  It took a few weeks to
repair the damage done.  

I appreciate that you understand that your public stature gives your words
authority and that you must be careful what you say.

Sincerely,

William Miller

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Bill Brooks
Sent: Monday, October 21, 2013 12:17 PM
To: Howie at CatamountSolar.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] MC Cable for DC runs

Howie,

I think your electrician friend either misheard John or John was wrong. I
believe the truth is that AC cable (aluminum clad) would have to be listed
for dc. The NEC is specific about the grounding capabilities of the MC. I am
unaware of any specific dc or ac requirements that MC has. There is a
possibility that MC may be sold with an aluminum sheath. I'm not sure why
aluminum sheathing would have anything to do with how it works, but since AC
cable has that concern, this may be what John is referring to.

Overall--it is bad form to say that anything is not allowed without specific
references regardless of the source. I have made a few false statements in
the past and I greatly regret those mistakes. I now try to back up my
statements with as much information as possible so that the source of the
information is clear. Sometimes (often) I have opinions and I try to make it
clear when I am stating my opinions.

John has been known to make mistakes. Unfortunately some of his recent
articles in IAEI journal have several mistakes which is really bad since
AHJs read his articles carefully. Hopefully we can get new articles in IAEI
journal that set the record straight.

Bill.