[RE-wrenches] 690.31 pics

[R Ray Walters]

Very nice looking work, Dave. We do enough pole mounts that we started  
making our own racks. Similar to DP&W, but we weld the head directly  
to the pole, and incorporate a screw jack that makes tilt adjustments  
easier.
Our inspector hasn't given us any trouble about the exposed wiring,  
but we keep it pretty clean and secure, and mount the combiner box  
just below the head, to limit the unprotected wiring.
We're protected to below 6 ft, but not 8 ft. Where does it say 8 ft?
398.15 C covers 'open wiring methods' and says conductors above 7 ft  
are considered protected from physical damage. Bill Brooks said 8 ft  
in his excellent presentation, but I never found the code reference to  
that exact height.
110.27 A 4 : 'Guarding of Live Parts' says 8 ft height, but this is  
for protection from exposed bare conductors or exposed live parts. All  
of our gear is insulated, no exposed live parts, so I think 398.15C is  
closer to being applicable. 690.31A says all wiring methods included  
in the code shall be permitted, so again 398.15C with 7 ft height  
seems to work.


Thanks,

R. Walters
ray at solarray.com
Solar Engineer




On Nov 10, 2009, at 7:10 PM, David Palumbo wrote:

> Ray,
>
> Here you go. If the 2MB is too big let me know and I’ll split it up.
>
> David Palumbo
> President, Independent Power LLC
> 462 Solar Way Drive, Hyde Park, VT 05655
> NABCEP Certified
> www.independentpowerllc.com
> (802) 888-7194
>
> <690.31 TPM .zip>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20091110/d9f62f9b/attachment-0002.html>