Xantrex Technology PV225S-480-P - Manual (Page 60)

Installation
3–12 152606
Wire Gauge and Torque Requirements
Table 3-1 provides acceptable wire gauges, bolt sizes, and torque values for AC
terminal connections.
Table 3-2 provides acceptable wire gauges, bolt sizes, and torque values for DC
terminal connections.
Grounding
System Grounding Install a copper ground rod within three feet of the PV225S enclosures per the
National Electric Code ANSI/NFPA 70. The single-point ground for the system is
to be made at the AC ground bar (TB12) in the AC Interface Enclosure.
Table 3-1 AC Terminal Wire Gauge, Bolt Size, and Torque Values
AC Terminal
Connections
Acceptable Wire Size Range
(both models)
Bolt (Hardware)
Size
Torque
Requirements
TB1
(Chassis Ground) 500MCM to #4 AWG (1 stud per pole) 3/8-16 420 in-lb (47.5 Nm)
TB12
(System Ground) 500MCM to #4 AWG (1 stud per pole) 3/8-16 420 in-lb (47.5 Nm)
TB11 (Neutral) 500MCM to #4 AWG (1 stud per pole) 3/8-16 228 in-lb (25.7 Nm)
S1-2T1, S1-4T2,
S1-6T3 350MCM to #6 AWG (1 stud per phase) M10 (See Caution
on page 3–18) 310 in-lb (35.0 Nm)
T6-X1, T6-X2,
T6-X3 350MCM to #6 AWG (2 studs per phase) 3/8-16 420 in-lb (47.5 Nm)
TB5, TB6, TB7 350MCM to #4 AWG (6 openings per phase) 3/8 Hex 375 in-lb (42.4 Nm)
Table 3-2 DC Terminal Wire Gauge, Bolt Size, and Torque Values
DC Terminal
Connections
Acceptable Wire Size Range
(both models)
Bolt (Hardware)
Size
Torque
Requirements
S2-6, K2-6T3, TB4 600MCM to #4 AWG (2 openings per pole) 1/2 Hex 600 in-lb (67.8 Nm)
Figure 3-10 Single-point Ground (TB12) Ground Bar
AC Ground Bar
(TB12) to be used
for the Single Point
Ground
AC Interface Enclosure