Copyright © 2011, PHONO SOLAR
Page 26 of 29
NOTE!
We recommend you periodically check all PV mounting and
grounding hardware for tightness and integrity.
GROUNDING OF MULTIPLE AC RACKING SYTEMS
Required: 12 AWG (or larger) copper ground wire.
After installing a second or subsequent PV rack, install one PV rack ground lug in the existing
PV rack as shown in Figure 3.
Install one PV rack grounding lug on the newly installed PV mounting rack. Cut a length of
ground wire of sufficient length to span the distance between the old and new ground lugs,
plus three inches to allow for contraction of the ground wire in cold weather.
Insert an end of the ground wire in one PV rack ground lug. Insert the remaining end of the
ground wire in the other lug. Tighten both ground lug compression screws to 12 inch-lbs.
Repeat the above steps for subsequent PV rack mounts.
NOTE!
All hardware supplied with your PV mounting rack is stainless steel.
Do not replace this hardware with plated or non-stainless materials.
NOTE!
AC Modules are equipped with an internal ground approved to UL
safety standards. The internal ground connects the AC Module chassis to a
safety earth ground through the utility ground.
No other grounds to the AC Module are necessary or required.
Only the AC module frames and rack system require ground
connections.
MOUNTING THE HELIOSENTRY
®
:
Follow instructions in the HelioSentry® Installation Manual.
WIRING THE HELIOSENTRY® TO YOUR AC PANEL (BREAKER BOX)
Follow instructions in the HelioSentry
®
Installation Manual.