Photovoltaic System
LABELING
REQUIREMENTS
NEC 2014 ARTICLE 690 AND IFC 2012
Breaker Panel / Pull Boxes Main Service Disconnect
Main Service Disconnect
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NEC 690.5(C)
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Part No. 596-00498
NEC 690.33(E)(2)
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Part No. 596-00244
NEC 690.17(E)
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Part No. 596-00497
NEC 110.27(C) & OSHA 1910.145(f)(7)
Part No. 596-00499
Labeling Requirements
for Article 690
NEC 690.13(B) Each photovoltaic system disconnecting
means shall be permanently marked to identify it as a
photovoltaic system disconnect.
NEC 690.15, IFC 605.11.3 If the equipment is energized
from more than one source, the disconnecting means must
be grouped and identified.
NEC 690.16(B) Non-load break rated disconnect means
shall be marked.
NEC 690.17(E) Where all terminals of the disconnecting
means may be energized in the open position, a warning
label shall be mounted on or adjacent to the disconnecting
means.
NEC 690.31(B) Identification and Grouping Photovoltaic
system conductors shall be identified and grouped. The
means of identification shall be permitted by separate color
coding, marking tape, tagging or other approved means.
NEC 690.31(G)(3)(4), IFC 605.11.1.2 Labels shall
appear at every section of the wiring system that is
separated by enclosures, walls, partitions, ceilings or floors.
Spacing between labels not to exceed 10 feet (3 m).
NEC 690.33(E)(2) Interruption Current: be a type that
requires the use of a tool to open will be marked "Do Not
Disconnect Under Load."
NEC 690.35(F) A PV power source shall be labeled at
each junction box, combiner box or disconnect, and device
where energized, ungrounded circuits may be exposed
during service.
NEC 690.31(G)(1) Where circuits are embedded in build
up, laminate or membrane roofing materials not covered by
PV modules and associated equipment, the location of the
circuits shall be clearly marked.
NEC 690.31(I) Bipolar photovoltaic systems shall be clearly
marked with a permanent, legible warning notice indicating
that the disconnection of the grounded conductor(s) may
result in overvoltage on the equipment.
NEC 690.5(C) A label shall appear on the utility interactive
inverter or be applied by the installer near the ground fault
indicator at a visible location.
NEC 690.52 AC modules shall be marked with
identification terminals or leads with the ratings as shown
on the label.
NEC 690.53 A permanent label for the direct-current PV
power source shall be provided by the installer at the PV
disconnecting means.
NEC 690.54 All interactive system points of interconnection
with other sources shall be marked at an accessible location
at the disconnecting means as the power source and with
the rated AC output current and the nominal operating AC
voltage.
NEC 690.55 PV power systems employing energy storage
shall also be marked with the maximum operating voltage,
including any equalization voltage and polarity of the
grounded circuit conductor.
NEC 690.56(C) Each Rapid Shutdown Switch shall be
permanently marked to identify it as a Photovoltaic Rapid
Shutdown. The sign or placard shall be marked as
"PHOTOVOLTAIC SYSTEM EQUIPPED WITH RAPID
SHUTDOWN" using white letters that are 3/8" tall on a red
background and shall be reflective.
NEC 690.64 Points of connection shall be in accordance
with NEC 705.12.
Adhesive Fastened Signs
ANSI Z535.4 – 2011 Product
Safety Signs and Labels, provides
guidelines for the design and
durability of safety signs and
labels for application to electrical
equipment. NEC 110.21(B)(1)
The label shall be suitable for the
environment where it is installed.
NEC 110.21(B)(3)
Where required elsewhere in
this code, all field applied labels,
warnings and markings should
comply with ANSI Z535.4.
NEC 110.21(B) FIELD MARKING
Adhesive fastened signs may be
acceptable if properly adhered. Vinyl
signs shall be weather resistant.
IFC 605.11.1.3
NEC 690.17(E)
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Part No. 596-00497
NEC 690.35(F)
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Part No. 596-00588
NEC 690.15 & NEC 690.13(B)
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Part No. 596-00613
NEC 705.12(D)(3) & NEC 690.64
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Part No. 596-00495
WARNING
DUAL POWER SOURCE
SECOND SOURCE IS PHOTOVOLTAIC SYSTEM
NEC 690.54
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Part No. 596-00239
PHOTOVOLTAIC AC DISCONNECT
MAXIMUM AC OPERATING CURRENT:
MAXIMUM AC OPERATING VOLTAGE:
NEC 110.27(C) and OSHA 1910.145(f)(7)
Part No. 596-00499
NEC 705.12(D)(3-4) & NEC 690.64
Part No. 596-00587
NEC 690.10(C)
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Part No. 596-00591
NEC 690.15 & NEC 690.13(B)
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Part No. 596-00243
NEC 690.15 & NEC 690.13(B)
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Part No. 596-00243
NEC 705.12(D)(2)(3b)
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Part No. 596-00589
NEC 705.12(D)(2)(3b) Where two
sources, one a utility and the other
an inverter, are located at opposite
ends of a busbar that contains loads,
a permanent warning label shall be
applied to the distribution equipment
adjacent to the back-fed breaker from
the inverter that displays the text on
Part No. 596-00589, or equivalent
wording.
NEC 705.12(D)(3-4)
Equipment containing
overcurrent devices in
circuits supplying power
to a busbar or conductor
supplied from multiple
sources shall be marked to
indicate the presence of all
sources.
NFPA 2012 130.5(C)
Same as NEC110.16 but includes
additional label information that was
required after 9/30/2011. Check latest
2012 NFPA Arc Flash requirements.
OSHA 1910.145(f)(7)
Warning tags are used to represent a
hazard level between "Caution" and
"Danger."
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