Polar Bear East/West 10 Degree Installation Manual
9910022 Rev A
15
All PanelClaw module mounting attachments (“Claws”) are certified as recognized components under UL
2703 for module-to-module and module-to-mounting system electric bonding. For projects using
modules not currently included in PanelClaw’s UL 2703 listings, additional approvals from the module
manufacturer and the relevant permitting authority may be necessary to utilize the UL 2703 electric
bonding and grounding method below.
Additional information regarding UL 2703 and the specific modules included in PanelClaw’s UL and ETL
listings can be found in the PanelClaw UL & ETL Overview (UL 2703) document (available at
). For modules that are listed, please follow the instructions. For unlisted and
unapproved modules follow the grounding instructions in Appendix E.
Electrical Grounding Instructions – UL2703 Compliant
Supports within the array are required to be electrically bonded to other DC grounding paths via the use
of a compatible UL 467 listed grounding device acting as a GEC and either #8 or #6 AWG Cu bonding
jumpers.
1.
First determine the quantity of strings that a single bonding jumper connection can
accommodate based on the module series fuse rating and bonding jumper size (
).
Note:
Verify that all devices used in connecting this bonding jumper can accommodate the
conductor being used.
Table 1 Strings per Bonding Jumper
2.
Once the quantity of strings per bonding jumper has been determined, a UL 467 listed
grounding device must be attached to one Support within that group of strings. PanelClaw
provides Supports with a multi-purpose tab to which a grounding device/lug can be attached
(
). The multi-purpose tab has a hole that is .198” - .208” in diameter.
Module Series Fuse
Rating / DC String Fuse
Rating (A)
Size of Bare Cu Bonding Jumper (AWG)
#8
#6
Allowable Ampacity of Conductor (A)
90
125
Number of Strings per Bonding Jumper
10
9
12
15
6
8
20
4
6
25
3
5
30
3
4
