Carflex revisited [RE-wrenches]

[Bill Brooks]

Lynne,

Go back and read the message again. I am not suggesting that we use those
products. I am suggesting that the PV module manufacturers could use those
products in a listed package.

All this emotion over flexible conduit. I still believe Tray Cable or USE-2
is cheaper and better. Why is everyone so intent on using conduit in the
array? I will follow with a response to Drake and Bob-O concerns later.

Bill.

> -----Original Message-----
> From: Lynne A Carter [mailto:solarvil at netpath.net]
> Sent: Friday, May 25, 2001 4:03 PM
> To: RE-wrenches at topica.com
> Subject: Re: Carflex revisited [RE-wrenches]
>
>
> 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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