Polar Bear III HD 5 Degree Installation Manual
9910034 Rev F
16
Step
5
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Electrical Grounding
Please consult with national and local building code(s) for complete grounding requirements for your
installation. The Polar Bear grounding method conforms to UL 2703 and is certified by UL for use with
approved photovoltaic modules listed under UL 1703. Installers can quickly and easily establish UL-
certified electric bonds between all connected array components, including modules and mounting
system components, without the use of additional grounding devices, e.g. ground lugs and copper wire.
At least one ground lug must be used to ground all strings within a physical sub-array provided the fuse
rating for each string does not exceed 30 amps. Installers may opt to use multiple lugs per sub-array for
redundancy. When grounding devices are installed according with the approved methodology and
capacity below, the connections described above meet all the requirements outlined in NEC 690.43.
Grounding Instructions
For modules that have been evaluated for use with Polar Bear III HD 10 Degree, please follow the
instructions below in
Appendix C: UL 2703 Electrical Grounding.
Additional information regarding UL
2703 and the specific list of evaluated modules included in PanelC
law’s UL listing can be found in the
“PB3 HD UL Overview and Module Listing”
document (available at
For modules that have not been evaluated for use with Polar Bear III HD 10 Degree, please follow the
instructions below in
Appendix D: Electrical Grounding (UL 2703 not applicable).
Note: During grounding and bonding ensure that there is separation between bare copper and
aluminum or galvanized steel components.
