3" Top Caps Manual
Table Of Contents
GROUND MOUNT INSTALLATION MANUAL - 6© 2019 IRONRIDGE, INC. VERSION 2.8
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
➢ Tape ends of rail, to keep bolts from sliding out while moving.
B. FASTEN CONNECTORS
Center rails on cross pipes, leaving equal distance on
ends. Secure with Rail Connector hardware: 3/8”-16
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.
GROUNDING LUGS
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.
➢ Only one Grounding Lug required per continuous subarray,
regardless of subarray size (Unless frameless modules are used,
see Page 10).
➢ If using Enphase microinverters or Sunpower AC modules,
Grounding Lugs may not be needed. See Page 11 for more info.
➢ Grounding Lugs can be installed anywhere along the rail and in
either orientation shown.
➢ Grounding Lugs are intended to for use with one solid or
stranded copper wire, conductor size 10-4AWG.
4. SECURE LUGS
A
B
U-Bolt
60 in-lbs
Bracket
21 ft-lbs
Hex Nut
(84 in-lbs)
Terminal Screw
(20 in-lbs)
Hex Nut
(80 in-lbs)