2020 Installation Guide

BI 7.2.3-46
Feb-2021, Rev 14
7
2.4 System Electrical Bonding
The QRail system, when properly assembled and installed, provides an integrated electrical bonding path, ensuring that
all exposed metal parts and the PV module frames are electrically connected. The QRail employs a number of features to
ensure reliable electrical connectivity.
Images 2.4.1 and 2.4.2 show the available current path(s) in the QRail system for standard (2 or more rails per row of
modules) and shared rail configurations, respectively.
Images 2.4.4 through 2.4.15 provide detail drawings of the labeled connection points.
Bonding and Fault Path
2.4.1 Standard configuration bonding path (two rail system shown)
2.4.2 Shared configuration bonding path
2.4.3 Orphan module configuration bonding path
Bonding mid clamp
Internal bonding splice
Standard end clamp
Copper ground conductor
End clamp w/ WEEB-BMC
QMR-GLQ-A-50 Grounding lug
Alternate module bonding device
NOTE!
The QRail Hidden End
Clamp is not NOT a bonding
solution and therefore
in the case of orphaned
modules, an alternative listed
module grounding device in
conjunction with all rails being
grounded must be utilized. See
Diagram 2.4.3. Alternatively,
use Universal End Clamps
with WEEB-BMC installed per
diagram 2.4.10.
Hidden end clamp