[RE-wrenches] DC positive and negative in same conduit, other inspection issues

[Kelly Keilwitz, Whidbey Sun & Wind]

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
sunwind at whidbeysunwind.com

On 8/19/09 2:41 PM, "Dave Click" <daveclick at fsec.ucf.edu> 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?