equipment grounding conductors [RE-wrenches]
Drake Chamberlin
Drake.Chamberlin at redwoodalliance.org
Wed Oct 24 12:53:15 PDT 2007
Hi Larry,
This is the issue of the size of the equipment grounding conductor, and
if we can use EMT conduit for an equipment ground as permitted by
250.118. The equipment grounding conductor size for PV is covered in
690.45.
Thanks,
Drake
Larry Crutcher, Starlight Solar wrote:
>
>
> Drake Chamberlin wrote:
> >
> > Correction:
> >
> > We size the wire for 125% short circuit current.
> >
> > Drake
> >
>
> Drake,
>
> The 125% rule is correct for determining the ampacity of your source
> circuit current. However, you must add an additional 125% to size the
> conductors and the overcurrent protection. This means you need 156% of
> the Isc for all PV wire runs and the fuses or breakers protecting each
> string. Also, do not forget to derate for temperature.
>
> Larry Crutcher
> Starlight Solar
> Yuma, AZ
> Renewable Energy Products Powered by STARLIGHT
- - - -
Hosted by Home Power magazine
To send a message: RE-wrenches at topica.com
Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read
List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php
Check out participant bios: www.mrsharkey.com/wrenches/
Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at re-wrenches.org
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com
For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------
More information about the RE-wrenches
mailing list