This came up on the list a couple of weeks ago, and we ordered some
label kits (Alt E Store) that supposedly had everything needed to
meet NEC requirements for signage.
I then double checked it against articles 690, 700, 702, and 705. I
found some interesting things, specifically 702.8 (B) covering
standby systems (we do mostly grid tie with battery backup, so I
think this applies)
It says we need to have a plaque at the grounding location?!
Also, 700.8A, 702.8A, and 705.10, 705.12D4, 705.70(4) all require a
plaque or directory at the Service Entrance that lists the type and
LOCATION of all power sources. An example photo is in the 08 Handbook
under 700.8. Its a big plaque with a lot of verbage. Is anyone doing
this? We always put a sticker (that comes with the inverter) warning
that the system has a DC to AC inverter, and to disconnect all
sources, but no info on location.
Considering I found found 5 places (so far) in the NEC that require
this, I'm thinking about doing it.
Also, back to the sticker collection from Alt E, it also doesn't
include stickers for the following:
690.5 C labeling DCGFI
690.10C labeling single 120 vac no branch circuits....
690.35 F ungrounded DC......
Finally, do we really need to label disconnects with the 690.17 (4)
both sides energized....blah,blah....
if the inverter is going to cut its output in milliseconds after the
switch is opened?
I know I'm always asking for trouble, (like what is the difference
between a sign, a plaque, a directory, a label, and marking??)
Thanks in advance,
R. Walters
[EMAIL PROTECTED]
Solar Engineer
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