Carflex revisited [RE-wrenches]

[Lynne A Carter]

Bill,
All this talk of flexible conduit I am confused are you saying that the "I
believe if you look at the "Heyco-Flex II it should have a backwards "UR"
which stands for UL-recognized" or "The Corrlok/KOPEX System" is this what
your recommending we should be using on all our PV Installations? Starting
yesterday?

When I asked my local Electric supply he said that's says if I have to use
that it is "horse shit". He can not get it here in NC, they have agreements
with territories and suppliers that only let them sell carflex.  He said
"besides they used carflex in the nuclear power plant inspection systems
here in NC,  if it good enough for the nukes its good enough for roofs".
Gives me a lot of faith in the nukes.
Lyn

Lyn at solarvillage.com
Solar Village Institute inc.
PO Box 14
Saxapahaw, NC  27340
Tel. 336-376-9530
Fax. 336-376-1809
www.solarvillage.com

----- Original Message -----
From: Bill Brooks <billbrooks7 at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Thursday, May 24, 2001 7:55 PM
Subject: RE: Carflex revisited [RE-wrenches]


> Pat and other flexible wrenches,
>
> Thanks for the info. I believe if you look at the Heyco-Flex II it should
> have a backwards "UR" which stands for UL-recognized. This means that
> Solarex can install it in a UL-list package, but many inspectors may not
> allow it in a field installed situation. That is the same issue with the
> Corrflex that I presented in my email.
>
> Ambient temperature for wiring or conduit is the highest temperature it
will
> see in the application. On the back of a module connected to a junction
box
> on  a roof-mounted (stand-off) installation, the conduit will get about 30
> degrees  C hotter than the outdoor temperature. If you have days that get
to
> 40 degrees C (just over 100F) you will see 70C temperatures on your flex.
> This is not referring to back of module temperature which is typically 5C
> hotter.
>
> You can see that 60C is clearly not hot enough. I spoke with a rep today
> that was in touch with the engineers at Electriflex (makers of Liquatight)
> and he said that they make an "All-Temperature Liquatight" ATLA that is
105C
> dry rated but the UL does not have a listing category any more for 80C.
> Sounds like we need to connect with UL and get them on board with this
> issue. Let's hear back from Bob-O now.
>
> Bill.
>
>
> > -----Original Message-----
> > From: Pat Kiernan, Eco Electric, Inc. [mailto:ecoelec at rof.net]
> > Sent: Thursday, May 24, 2001 7:14 PM
> > To: RE-wrenches at topica.com
> > Subject: RE: Carflex revisited [RE-wrenches]
> >
> >
> > Wrenches,
> >
> > From my posting of 4/23/01...
> > I have used Carlon Carflex for years with no problems. In the Colorado
> > mountains we do not see the hot days that would drive back of module to
75
> > C. Recently tried Heyco Heyco-Flex II on a few projects. It has a
> > temperature rating of 70 C (no wet/dry distinction in the catalog). It
is
> > more flexible than the Carflex so hopefully will reduce strain on
> > the j-box.
> > Standard color is black. Somewhat more expensive than Carflex.
> >
> > I neglected to mention in April that the Solarex MSX-120 comes from the
> > factory with Heyco-Flex II connecting the two module j-boxes (one for
each
> > 60 watt section). Since the MSX-120 is UL approved, I assume that
> > this flex
> > is suitable for module wiring.
> >
> > I would like to  see some clarification between  module back surface
> > temperature and the flex conduit ambient temperature in this
application.
> > Bill Brooks, others ... any info?
> >
> >
> >
> > Pat Kiernan
> >
> > Eco Electric, Inc.
> > PO Box 550
> > Carbondale, CO 81623
> > tel/fax (970) 963-3132
> > e-mail: ecoelec at rof.net
> >
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