[RE-wrenches] Sunlight Resistant THWN-2

[Andrew Truitt]

Thanks guys.  Good info.  I think this gets to the notion that Sunlight
Resistant is not Sunlight Proof.  That's why I've always advocated for
keeping outdoor conductors covered wherever possible.  In this case the
cable trays will have covers on them so I think we are good to go.

A follow up Q: can anyone point me to a code section (NEC or otherwise)
that prohibits installing conduit in physical contact with existing
equipment, such as where it crosses an existing conduit on a rooftop?



For a brighter energy future,


Andrew Truitt

Principal
Truitt Renewable Energy Consulting, LLC

(202) 486-7507

LinkedIn Profile <http://www.linkedin.com/pub/andrew-truitt/8/622/713>

Company Website <http://truittreconsulting.weebly.com/>

NABCEP Certified PV Installation Professional ID: 032407-66

Colorado Journeyman Electrician License No.: 600132

 <%28202%29%20486-7507>

[image: 24 copy.jpg]

"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

~William McDonough








On Tue, Nov 26, 2013 at 10:10 AM, Ray Walters <ray at solarray.com> wrote:

>  I'd be super sure: I just pulled some wire out of a weatherhead that was
> probably 20 years old.  All the out door exposed conductors had the
> insulation cracked completely through showing several feet of bare copper.
> I wish I had taken a picture, it was NOT just the outer clear covering, it
> was a complete insulation breakdown.
> This has passed Denver City Electrical inspection BTW.
>
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer,
> Licensed Master Electrician
> Solar Design Engineer303 505-8760
>
> On 11/26/2013 6:55 AM, Dave Click wrote:
>
> Andrew, that looks legit to me. I think that a lot of the larger THWN-2 is
> sunlight resistant, but the outer clear layer will probably start peeling
> off within a few months of the installation (see attached). I imagine the
> same issues we see with colored USE-2 fading over time would also apply to
> THWN-2.
>
> Caveats would be 690.31(A) requiring readily-accessible output circuit
> wiring be installed in a raceway, and 690.35(D) requiring ungrounded dc
> wiring (source or output circuit) be installed as either PV WIRE or within
> a raceway or TC.
>
> DKC
>
>
>  On 2013/11/25, 14:13, Andrew Truitt wrote:
>
> Wrenches - Is anyone familiar with sunlight resistant THWN-2?  I'm
> inspecting a groundmount on a Landfill where all PV Output Circuit wiring
> is in exposed cable tray (since they can't dig) and they are using
> SouthWire SIMpull sunlight resistant THWN-2 conductors.  NEC2011 690.31(B)
> specifies USE-2 or PV Wire for Source Circuit wiring and module
> interconnection, but doesn't address Output Circuit wiring.  Here are the
> specs for the wire types used:
>
>  http://www.southwire.com/products/SIMpullAluminumT90.htm
>
>  http://www.southwire.com/products/SIMpullTHHNCableAlumflexConductors.htm
>
>
>  Is this legit?
>
>
>
>   For a brighter energy future,
>
>
> Andrew Truitt
>
> Principal
> Truitt Renewable Energy Consulting, LLC
>
> (202) 486-7507
>
> LinkedIn Profile <http://www.linkedin.com/pub/andrew-truitt/8/622/713>
>
> Company Website <http://truittreconsulting.weebly.com/>
>
> NABCEP Certified PV Installation Professional ID: 032407-66
>
> Colorado Journeyman Electrician License No.: 600132
>
>  <%28202%29%20486-7507>
>
> [image: 24 copy.jpg]
>
> "Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
> to fission. And it just so happens that there's an enormous fusion reactor
> safely banked a few million miles from us. It delivers more than we could
> ever use in just about 8 minutes. And it's wireless!"
>
> ~William McDonough
>
>
>
>
>
>
>
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