[RE-wrenches] 2008 690.31
R Ray Walters
ray at solarray.com
Tue Nov 10 17:56:17 PST 2009
Sounds like a very nice install Dave, I'd like to see pictures if you
could.
Thanks,
R. Walters
ray at solarray.com
Solar Engineer
On Nov 10, 2009, at 6:51 PM, David Palumbo wrote:
> William,
>
> From 2008 Handbook (actual codebook is not at my desk at this time).
> IV. Wiring Methods
> 690.31 Methods Permitted
> (A) Wiring Systems. All raceway and cable wiring Methods included
> in this Code and other wiring systems and fittings specifically
> intended and identified for use on photovoltaic arrays shall be
> permitted. Where wiring devices with integral enclosures are used,
> sufficient length of cable shall be provided to facilitate
> replacement.
> Where photovoltaic source and output circuits operating at maximum
> system voltages greater than 30 volts are installed in readily
> accessible locations, circuit conductors shall be installed in a
> raceway.
>
> Highlighted note in Handbook: Most PV modules do not have provisions
> for attaching raceways. These circuits may have to be made “not
> readily accessible” by use of physical barriers such as wire
> screening.
>
> It goes on with a FPN on temperatures and then continues with
> sections (B) thru (F); which someone with the CD could paste for us.
>
> I assumed you were interested primarily in (A) William. We are using
> a screening method on DPW TPM that works well for us. We are using
> an outdoor plastic lattice, white in color, that we buy at Lowes and
> custom cut for our specific needs. We use it to screen any MC cables
> that are within 8 feet of ground level. I could send anyone
> interested a picture if they e-mail and request. To bring our wiring
> down from the PV modules we enter the DPW gimbal thru a Hubbell ¾”
> 90 degree cord grip (DPW has a knock out for such) and then we exit
> the steel pipe mast directly into the back of a PVC j-box thru a
> 2-1/2” hole we make in the pipe, we weld a 6x6 plate onto the hole
> for the j-box and protect the wiring coming out of the pipe mast
> with a short piece of PVC that is bushed on both ends. After the j-
> box we are all SCHD 80 PVC before transitioning to schedule 40 under
> ground.
>
> Dave
>
>
> From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-
> bounces at lists.re-wrenches.org] On Behalf Of William Miller
> Sent: Tuesday, November 10, 2009 6:14 PM
> To: RE-wrenches
> Subject: [RE-wrenches] 2008 690.31
>
> Friends:
>
> I have not received my 2008 NEC on CD. Pending it's arrival, could
> one of you good folks please post 690.31 to the wrenches as a
> personal favor to me?
>
> Thanks in advance.
>
> William Miller
>
>
> Please note new e-mail address and domain:
>
> William Miller
> Miller Solar
> Voice :805-438-5600 Fax: 805-438-4607
> email: william at millersolar.com
> http://millersolar.com
> License No. C-10-773985
>
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