[RE-wrenches] 2008 690.31

[David Palumbo]

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 <http://millersolar.com/> 
License No. C-10-773985

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