Manual

GROUND MOUNT INSTALLATION MANUAL - 6© 2021 IRONRIDGE, INC. VERSION 2.9
3. PLACE RAILS
A. ATTACH HARDWARE
On the ground, attach Rail Connector brackets to rail by
sliding 3/8”-16 bonding bolts into side slot. Space out to

tighten Flange Nuts onto bolts.
➢ Tape ends of rail, to keep bolts from sliding out while moving.
B. FASTEN CONNECTORS
Center Rails on horizontal beams, leaving equal distance
on ends. Secure with Rail Connector hardware: 3/8”-16
U-bolts, Flange Nuts, Flat Washers and Lock Washers.
Torque U-bolt nuts to 60 in-lbs and bracket to 21 ft-lbs.
➢ Spacing between rails should align with module manufacturer
recommended clamping locations.
4. SECURE LUGS
A
U-Bolt
60 in-lbs
Bracket
21 ft-lbs
Hex Nut
(84 in-lbs)
Terminal Screw
(20 in-lbs)
Hex Nut
(80 in-lbs)
B
FLANGE NUT
GROUNDING LUG
BOLT
STAR WASHER
Terminal Screw
(20 in-lbs)
Hex Head
(60 in-lbs)
Module Grounding Lug
Rail Grounding Lug
Grounding Lugs
Only one Grounding Lug (Rail or Module) required per continuous
subarray, regardless of subarray size (Unless frameless modules are
used, see Page 13).
➢ Grounding Lugs are intended to for use with one solid or
stranded copper wire, conductor size 10-4 AWG.
Rail Grounding Lug
Insert T-bolt in Top Rail slot and torque Hex Nut to 80 in-lbs. Install
a minimum 10 AWG solid copper or stranded grounding wire. Torque
terminal screw to 20 in-lbs.
➢ Rail Grounding Lugs can be installed anywhere along the Rail and
in either orientation shown.
Module Grounding Lug
Insert Bolt through Module Manufacturer approved grounding location
and torque Hex nut to 60 in-lbs. One Module Grounding Lug may be
installed to one module per continious array. Install a minimum 10 AWG
solid copper or stranded grounding wire. Torque terminal screw to 20
in-lbs.
➢ If using Enphase microinverters or Sunpower AC modules,
Grounding Lugs may not be needed. See Page 12 for more info.
➢ Refer to module manufacturer manual for grounding instructions.