This is interesting, because we were considering cable trays, too. My
guess is that both requirements would apply. Picky, but I don't see
that 690 exempts the requirements of 392. One is for PV, one is for over
600 v. Some code iteration in the future might have combined language
for PV over 600 v " Danger - High Voltage Photovoltaic Source - Keep
Away" and of course that's so verbose that the average Joe is just
going to stick his paws in there anyway.....
Ray Walters
Remote Solar
303 505-8760
On 9/2/20 7:54 PM, Corey Shalanski wrote:
Wrenches,
I am curious about the marking requirements for cable trays containing
PV source/output circuits rated over 600 volts, installed on a building:
NEC 392.18(H) requires a permanent, legible warning notice
carrying the wording “DANGER — HIGH VOLTAGE — KEEP AWAY” at least
once every 10 ft.
NEC 690.31(G)(3) requires a label or marking with the wording
"WARNING: PHOTOVOLTAIC POWER SOURCE" at least once every 10 ft.
Does the 690.31 label take precedence? Are there any situations where
both labels would be required (or recommended)?
--
Corey Shalanski
Jah Light Solar
Portland, Jamaica
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