Q CELLS Q.PEAK DUO XL-G10.c Installation And Operation Manual Download

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INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO XL-G10.2 / G10.c – Q CELLS

5 GROUNDING

Protective Grounding

In order to prevent electrical shock or fire, the frame of the module
as well as any non-current-carrying metal parts of the system must
be grounded. While this section provides some information about
grounding the Q CELLS frames and modules, reference should be
made to local statutes and regulations for specific requirements
on grounding. The U.S. National Electrical Code addresses these
issues in Article 250. A module with exposed conductive parts is
considered to be in compliance with this standard only when it is
either electrically grounded in accordance with the manufacturer’s
instructions and the requirements of the National Electrical Code,
ANSI/NFPA 70 (2014-2017), or when the bonding means has been
evaluated with this module to UL 2703.

Proper grounding is achieved by bonding all exposed non-current-
carrying metal equipment to the appropriately sized equipment
grounding conductor (EGC) or racking system that can be used
for integrated grounding.

Q CELLS frames are protected from corrosion with an anodized
coating, which has to be penetrated in order to ensure proper
bonding. The different methods listed below are suggested methods
for an appropriate bond between the frame and the EGC or racking
system (that will have to be properly grounded). The method appro-
priate for any individual installation will depend on multiple factors.

Option A: Use of a grounding lug

A listed grounding lug can be bonded to the frame using the grounding
holes pre-drilled in the frame. These holes are marked with a ground
symbol, as shown below on the frame section drawing: To install the
grounding lug, follow the specified instructions of the manufacturer.
The grounding lug should be made of stainless steel or tin plated
metals such as aluminum to avoid corrosion.

The grounding lug should be attached to the frame grounding hole
using a stainless steel screw, toothed lock washer or KEPS nut (in
order to penetrate the anodized layer) and backing nut. Care should
be taken to avoid the use of grounding hardware of dissimilar metals,
which may lead to corrosion.

Option B: Integrated grounding methods

The Q CELLS modules can be bonded with the racking system
using UL1703 or UL2703 certified integrated grounding methods.
The racking system will then have to be grounded so that the overall
system is properly grounded. The listed racking system and grounding
device should be installed in accordance with the manufacturers’
instructions. An example of such integrated grounding method is
the use of a WEEB clip or Schletter plate between the module and
the racking system, when mounting the module.

The WEEB washers are generally compatible with Q CELLS modules,
however each combination module / racking system requires a specific
WEEB washer size. Note that WEEB clips are intended for single use
only; they must not be reused after removal or loosening. Refer to
Wiley’s installation instructions for the specific use of WEEB washers.

An example of such integrated grounding method is the use of a
washer recognized as meeting UL2703 requirements between the
module and the racking system, when mounting the module. For
example, WEEB washers are generally compatible with Q CELLS
modules, however each combination module / racking system
requires a specific WEEB washer size. Note that WEEB washers are
intended for single use only; they must not be reused after removal
or loosening. Refer to Wiley’s installation instructions for the specific
use of WEEB washers.

•

Dimensions shown are in inches.

0.177” (+0.008/-0)

±0.08

0.79”

0.47”

0.08

PV Laminate

Backing Nut (Stainless Steel)

Toothed Lock Washer (Stainless
Steel)

Grounding Lug (Stainless Steel
or tin-plated metal)

Equipment
Grounding
Conductor