Installation manual

Wiring - General
152936 3–9
This manual is for use by qualified personnel only.
Grounding
System Grounding Install a copper ground rod within 3 ft. (1 m) of the Xantrex GT250 E Enclosures
per the National Electric Code ANSI/NFPA 70. The single-point ground for the
system is to be made at the ground bar in the AC Interface Enclosure.
Chassis Ground The chassis ground is a copper bus bar in the Main Inverter Enclosure and has a
12 mm bolt for terminating the DC ground. The ground conductor size depends
on the size of the main circuit breaker. NEC Table 250.122 (Ninth Edition) requires
that the ground conductor be at least #3 AWG for a 400 A circuit breaker and #6
AWG for a 200 A circuit breaker.
The equipment ground on the Xantrex GT250 E is marked with PE.
Figure 3-7 Single-point Ground; Ground Bar
Ground Bar to be
used for the Single
Point Ground
Figure 3-8 Chassis Ground Bar (TB1)
Ground Bar to be
used for the
Chassis Ground