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UL 2703
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UL 2703 1st Edition, January 28, 2015 UL Standard for Safety Mounting Systems, Mounting Devices, Clamping/Retention Devices, And Ground Lugs For Use With Flat-Plate Photovoltaic Modules And Panels
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Description / Abstract:
These requirements cover rack mounting systems, mounting
grounding/bonding components, and clamping/retention devices for
specific (manufacturer/model designation) flat-plate photovoltaic
modules and panels that comply with the Standard for Flat-Plate
Photovoltaic Modules and Panels, UL 1703, intended for installation
on or integral with buildings, or to be freestanding (i.e., not
attached to buildings), in accordance with the National Electrical
Code, ANSI/NFPA 70 and Model Building Codes. Systems, components
and/or devices evaluated under this standard may be used to ground
and/or mount a PV module complying with UL 1703 when the specific
module or frame has been evaluated for bonding/grounding or the
module has been evaluated for mounting with the evaluated system,
component or device.
These requirements cover rack mounting systems and clamping devices intended for use with photovoltaic module systems with a maximum system voltage of 1000 V.
These requirements cover rack mounting systems, clamping, retention devices pertaining to ground/bonding paths, mechanical strength, and suitability of materials only.
These requirements do not cover:
a) Equipment intended to accept the electrical output from the array, such as power conditioning units (inverters) and batteries.
b) Solar trackers or tracker mechanisms (except as specifically directed as to be utilized by the Outline of Investigation for Solar Trackers, UL 3703 and in combination with UL 3703).
c) Cell assemblies intended to operate under concentrated sunlight.
d) Optical concentrators.
e) Combination photovoltaic-thermal modules or panels.
f) Equipment intended to carry current as a normal function of that component, such as combiner boxes, connection boxes (other than connection box for grounding), wireways and enclosures housing live parts. See the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703 or the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741.
g) Ground rods and ground rod accessories.
h) The mechanical and structural requirements of the international building code.
Note: The IBC and other model codes may have additional requirements. As an example, compliance with the IBC will require development load combinations which include dead, snow, wind and seismic forces using ASCE 7. These loads will need to be applied in three orthogonal directions and the load resisting elements of the system will be required to adequately support the applied loads.
These requirements cover rack mounting systems and clamping devices intended for use with photovoltaic module systems with a maximum system voltage of 1000 V.
These requirements cover rack mounting systems, clamping, retention devices pertaining to ground/bonding paths, mechanical strength, and suitability of materials only.
These requirements do not cover:
a) Equipment intended to accept the electrical output from the array, such as power conditioning units (inverters) and batteries.
b) Solar trackers or tracker mechanisms (except as specifically directed as to be utilized by the Outline of Investigation for Solar Trackers, UL 3703 and in combination with UL 3703).
c) Cell assemblies intended to operate under concentrated sunlight.
d) Optical concentrators.
e) Combination photovoltaic-thermal modules or panels.
f) Equipment intended to carry current as a normal function of that component, such as combiner boxes, connection boxes (other than connection box for grounding), wireways and enclosures housing live parts. See the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703 or the Standard for Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources, UL 1741.
g) Ground rods and ground rod accessories.
h) The mechanical and structural requirements of the international building code.
Note: The IBC and other model codes may have additional requirements. As an example, compliance with the IBC will require development load combinations which include dead, snow, wind and seismic forces using ASCE 7. These loads will need to be applied in three orthogonal directions and the load resisting elements of the system will be required to adequately support the applied loads.