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Installation
975-0053-01-01 2–19
Required additional
grounding
If the PV array is located a considerable distance (over 100 feet) from the
Sun Tie XR, then an additional ground rod must be installed close to the
PV array for the most reliable lightning protection, as shown in Figure 2-
13. The grounded frame of the PV array provides a direct route to
dissipate lightning strikes through the closest ground rod. Please
reference NEC 2002 250.53 – “Grounding Electrode System
Installations” and NEC 2002 250.70 – “Methods of Grounding and
Bonding Conductor Connections to Electrodes” for specific grounding
requirements.
Figure 2-12 Typical roof mount installation grounding
Sun Tie Unit
Main Utility
Breaker Panel
Utility
Meter
DC Wiring
(and ground)
AC Wiring
Utility
Ground
Rod
Utility
Ground
Wire
Ground
Bar
Array
Ground
Wire
AC
Wiring
AC
Wiring to
Utility
Solar
Array
Bonded Neutral Wire
Ground
Bar
Connect all
array frames
together and
ground
*
NOTE
: An optional array ground wire
may be required in many states as an
additional permanent ground path in
the event the inverter is removed for
service. Check your local codes for
grounding requirements.
*Optional Array Ground Wire
Sun Tie
Ground
Rod
Note:
Always refer to your local codes for wiring and grounding
requirements, which may differ from the information given in this
manual.