Dave, Only GEC's are subject to the "continuous" rule (250.64C). It sounds like your are talking about an EGC tapped from the GEC.
When splicing PV GEC's required under 690.47D, either together (from separated arrays) or to the existing AC GEC (if close enough), we have been allowed to use split bolts instead of irreversible splices, per 250.64D1, "Grounding Electrode Conductor Taps" (at end of paragraph). I.E., the "continuous" rule is only being applied to the main GEC. I agree with Kurt on the LTNMF being used only as extra (not required) wire protection for the USE-2. We often do this when running PV conductors between short separations in modules or rails. I would think that only temperature and fill corrections would apply - and only if the length requires. -Kelly Kelly Keilwitz, P.E. Whidbey Sun & Wind, LLC Renewable Energy Systems NABCEP Certified PV Installer 987 Wanamaker Rd, Coupeville, WA 98239 PH & FAX 360-678-7131 [email protected] On 8/19/09 2:41 PM, "Dave Click" <[email protected]> wrote: > For the grounding electrode wiring, it seems that it's fine to me since > they ran the continuous #6 to each rail and then to the rod, qualifying > as the 690.47(D) supplemental electrode. But the split bolts tapping > that GEC to "ground the disconnect," these are required to be > irreversible connections to the ground bus in that disconnect, right? _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
