Sunmodo UL2703 User manual

Self-grounding
Hardware System
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Self-grounding Hardware
UL2703 Compliant
Pub. D10010-V001 Copyright 2016

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Hardware System
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Please read carefully before installing
Product is tested to and recognized to UL 2703 standards for safety grounding and
bonding equipment and meets UL1703 fire standards.
SunModo Self-grounding hardware system can be used to mount photovoltaic (PV)
panels in a wide variety of locations. All installations shall be in accordance with NEC
requirements in the USA. The self-grounding and bonding system is for use with PV
modules that have a maximum series fuse rating of less than 15A.
TABLE OF CONTENTS
Installer Responsibility.......................................................................................................................3
Safety................................................................................................................................................3
SunModo Self-grounding system.......................................................................................................4
Self-grounding Components..............................................................................................................5
Torque Values for Self-grounding Components.................................................................................6
Installation Instructions:.....................................................................................................................7
Clamp Installation –Portrait Orientation ............................................................................................7
End Clamp Installation ............................................................................................................................ 7
Clamp Installation –Landscape Orientation ......................................................................................8
Landscape End Clamp Installation.......................................................................................................... 8
Mid Clamp Installation............................................................................................................................. 8
Ground Wire Attachment...................................................................................................................9
Ground Lug Installation........................................................................................................................... 9
Rail End Covers ................................................................................................................................9
Table of Clamp Bolt Lengths and Part Numbers..............................................................................10

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Installer Responsibility
Before ordering and installing materials, all system layout dimensions should be confirmed by field
measurements. SunModo reserves the right to alter, without notice, any details, proposals or plans.
Any inquiries that you may have concerning installation of the PV system should be directed to your
SunModo Sales representative. Consult SunModo Sales for any information not contained in this
manual. This manual is intended to be used as a guide when installing SunModo Self-grounding
hardware system. It is the responsibility of the installer to ensure the safe installation of this product
as outline herein.
Installer shall employ only SunModo products detail herein. The use of non SunModo
components can void the warranty and cancel the letters of UL compliance.
Installer shall guarantee that screws and anchors have adequate pullout strength and
shear capacities.
Installer shall adhere to all relevant local or national building codes. This takes account of
those that supplant this document’s requirements.
Installer shall guarantee the safe placement of all electrical details of the PV array.
Installer shall comply with all applicable local, state and national building codes, including
periodic re-inspection of the installation for loose components, loose fasteners and any
corrosion, such that if found, the affected components are to be immediately replaced.
Installer to ensure the structural support members or footings for mounting the array can
withstand all code loading conditions. Consult with licensed professional engineer for the
appropriate loading conditions.
Installer to follow all regional safety requirements during installation.
This racking system may be used to ground and/or mount a PV module complying with UL
2703 only when the specific module has been evaluated for grounding and/or mounting in
compliance with the included instructions.
Safety
Review relevant OSHA and other safety standards before following these instructions. The
installation of solar PV systems is a dangerous procedure and should be supervised by trained
and experienced personnel.
It is not possible for SunModo to be aware of all the possible job site situations that could cause an
unsafe condition to exist. The installer of the ground system is responsible for reading these
instructions and determining the safest way to install the ground system. These instructions are
provided only as a guide to show a knowledgeable, trained erector the correct part placement one
to another. If following any of the installation steps would endanger a worker, the erector should
stop work and decide upon a corrective action.

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SunModo Self-grounding system
SunModo developed a proprietary grounding and bonding system that is built into the
mounting hardware for the rails, clamps and splices. We provide further grounding
through all of the SunBeam racking components including the Pipe Caps, I-Beams, Posts
and Post Base Plates. All hardware meet UL2703 Grounding and Fire Standards.
The basis of the system is our patented stainless steel floating grounding pin which is
designed to be captive in the mounting components and provides a bonding path from the
PV panel frames to the rails and rail splices, and finally to the ground lug.
Mid Clamp with Ground Pins

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Self-grounding Components
Portrait End Clamp Kit, fits panel
height from 31 to 50 mm. For last
3 digits, see table on last page.
K10224-XXX
Portrait Mid Clamp Kit with integral
grounding, fits panel height from
31 to 50 mm. For last 3 digits, see
table on last page. May be
repositioned until torqued to
final value.
K10180-XXX
For single-use only
Landscape End Clamp Kit with
adaptor for standard rail and
integral grounding, fits panel
height from 31 to 50 mm. For last
3 digits, see table on last page.
May be repositioned until
torqued to final value.
K10183-XXX
For single-use only
Landscape Mid Clamp Kit with
adaptor for standard rail and
integral grounding, fits panel
height from 31 to 50 mm. For last
3 digits, see table on last page.
May be repositioned until
torqued to final value.
K10182-XXX
For single-use only
Grounding Lug Kit with Grounding
Spacer and 1/4-20 T-Bolt. May be
repositioned until torqued to
final value.
K10179-001
For single-use only

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Torque Values for Self-grounding Components
These maximum torque values must be adhered to, both for mechanical strength and to
insure the performance of the integral grounding and bonding features. It is
recommended that anti-seize compound be applied to the screw threads and a torque
wrench be used to measure the bolt torque during final assembly.
Hardware
Torque lbs.
1/4-20 Bolts and Hex Flange Nut
7.5 ft. lbs.
1/4-20 Ground Lug, Flange Nut with 7/16 Hex Head
7.5 ft. lbs.
1/4-20 Ground Lug, Setscrew with 1/8 Allen drive.
4.2 ft. lbs. (50 in. lbs.)
1/4-20 Mid or End Clamp, Female Standoff with 7/16”
Hex Head Collar Nut
7.5 ft. lbs.
3/8-16 Bolts and Hex Flange Nuts
15 ft. lbs.
3/8-16 T-Bolts and Hex Flange Nuts
15 ft. lbs.
3/8-16 Setscrew with 3/16” Allen
10 ft. lbs.

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Installation Instructions:
Clamp Installation –Portrait Orientation
End Clamp Installation
Mid Clamp Attachment
There must be a minimum of 1.5 inches of Rail
extending beyond the PV panel frame.
Clamp the PV panel frame by inserting the T-Bolt
into the Rail slot. Position the End Clamp firmly
against the PV panel frame and secure using the
1/4-20 Collar Bolt. Using a 7/16” socket, torque to
7.5 ft. lbs.
Note: When two or more PV panels are installed
grounding via the End Clamp is optional. For a
single panel configuration (shown), insert the T-
Bolt into a T-Bolt Holder for grounding the panel to
the Rails.
Insert the T-Bolt in the Rail slot and turn
clockwise 90° to engage the head into the slot.
Insert Grounding T-Bolt Holder to lock T-Bolt in
place.
Thread the 1/4-20 Collar Bolt onto the top of the
T-Bolt as shown. After positioning the Mid
Clamp firmly against the PV panel frame, using
a 7/16” socket, tighten to 7.5 ft. lbs.
Proceed with the mounting of the PV panels
using the mid and end clamps. Specific
mounting instructions are shown in the following
sections for Portrait and Landscape mounting.
Installing Mid Clamps: A mid clamp is used
between PV panels. It will produce 1/2” spacing
between PV panel frames.
An End Clamp is used to secure PV panels at
the ends of a row.

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Clamp Installation –Landscape Orientation
Landscape End Clamp Installation
Mid Clamp Installation
End Clamps are used at the ends of a row of PV
panels.
Insert the T-Bolt in the Rail slot and turn
clockwise 90° to engage the head into the slot.
Insert Grounding T-Bolt Holder to lock T-Bolt in
place.
Thread the 1/4” Collar Bolt onto the top of the T-
Bolt as shown. After positioning the End Clamp
firmly against the PV panel frame, using a 7/16”
socket, tighten to 7.5 ft. lbs.
Insert the T-Bolt in the Rail slot and turn
clockwise 90° to engage the head into the slot.
Insert Grounding T-Bolt Holder to lock T-Bolt in
place.
Thread the 1/4” Collar Bolt onto the top of the T-
Bolt as shown. After positioning the Mid Clamp
firmly against the PV panel frame, using a 7/16”
socket, tighten to 7.5 ft. lbs.
Proceed with the mounting of the PV panels
using the mid and end clamps. Specific
mounting instructions are shown in the following
sections for Portrait and Landscape mounting.
Installing Mid Clamps: A mid clamp is used
between PV panels. It will produce 1/2” spacing
between PV panel frames.
An End Clamp is used to secure PV panels at
the ends of a row.

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Ground Wire Attachment
Ground Lug Installation
Rail End Covers
The picture shows a grounding lug mounted on
each Rail and a #6 solid copper grounding wire
connecting the Ground Lugs to the building
ground per NEC 690.43.
Each Rail should have a Ground Lug for
fastening the ground conductor to the array. The
Ground Lug is mounted on the top or side of the
Rail using a special 1/4” T-Bolt, Grounding
Spacer, and Flange Nut. Grounding Lugs
K10179-001, and detailed installation document
D10003 are available from SunModo separately.
Rail End Covers can be attached to the
mounting rails as shown.
Rail End Covers are also available for the
SunBeam Rail not shown.

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Table of Clamp Bolt Lengths and Part Numbers
Clamps
Part # End
Part # Mid
Size
"T" Bolt in.
"T" Bolt PN
Portrait
K10224-031
K10180-125
31 mm
1.25
B20015-011
Portrait
K10224-033
K10180-125
33 mm
1.25
B20015-011
Portrait
K10224-040
K10180-157
40 mm
1.57
B20015-013
Portrait
K10224-042
K10180-157
42 mm
1.57
B20015-013
Portrait
K10224-044
K10180-157
44 mm
1.57
B20015-013
Portrait
K10224-046
K10180-157
46 mm
1.57
B20015-013
Portrait
K10224-050
K10180-210
50 mm
2.10
B20015-002
Clamps
Part # End
Part # Mid
Size
"T" Bolt in.
"T" Bolt PN
Landscape
K10183-031
K10182-157
31 mm
1.57
B20015-013
Landscape
K10183-033
K10182-157
33 mm
1.57
B20015-013
Landscape
K10183-040
K10182-157
40 mm
1.57
B20015-013
Landscape
K10183-042
K10182-210
42 mm
2.10
B20015-002
Landscape
K10183-044
K10182-210
44 mm
2.10
B20015-002
Landscape
K10183-046
K10182-210
46 mm
2.10
B20015-002
Landscape
K10183-050
K10182-210
50 mm
2.10
B20015-002
Collar Nut
B20025-001
This table shows the nominal T-Bolt lengths for various PV Panels commonly used in the
industry.
See www.sunmodo.com for current warranty documents and information.
SunModo Corporation
1905 E 5th St., Suite A
Vancouver, WA 98661
Ph: 360-844-0048