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Installation
3–12 152315 Rev C
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 to be
connected to the PV100S DC terminal connections.
Grounding
System Grounding Install a copper ground rod within three feet of the PV100S 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 (TB2) 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
PV100S-208 PV100S-480 PV100S-208 PV100S-480
TB1
(Chassis Ground)
500MCM to #4 AWG
(1 stud per pole)
3/8-16 3/8-16 420 in-lb
(47.5 Nm)
420 in-lb
(47.5 Nm)
TB2
(System Ground)
500MCM to #4 AWG
(1 stud per pole)
3/8-16 3/8-16 420 in-lb
(47.5 Nm)
420 in-lb
(47.5 Nm)
TB6 (Neutral) 500MCM to #4 AWG
(1 stud per pole)
3/8-16 3/8-16 228 in-lb
(25.7 Nm)
228 in-lb
(25.7 Nm)
S1-2T1, S1-4T2,
S1-6T3
350MCM to #6 AWG
(1 stud per pole)
M10
(See Caution
on page 3–17)
M8 (See Caution
on page 3–17)
310 in-lb
(35.0 Nm)
115 in-lb
(13.0 Nm)
T6-X1, T6-X2,
T6-X3
350MCM to #6 AWG
(1 stud per pole)
3/8-16 3/8-16 420 in-lb
(47.5 Nm)
420 in-lb
(47.5 Nm)
TB4-A, TB4-B,
TB4-C
350MCM to #4 AWG
(2 openings per pole)
5/16 Hex 5/16 Hex 275 in-lb
(31 Nm)
275 in-lb
(31 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
PV100S-208 PV100S-480 PV100S-208 PV100S-480
TB3-1, TB3-2,
TB3-3
500MCM to #4 AWG
(2 openings per pole)
7/16 Hex 7/16 Hex 500 in-lb
(56.5 Nm)
500 in-lb
(56.5 Nm)
Figure 3-10
Single-point Ground (TB2) Ground Bar
AC Ground Bar
(TB2) to be used
for the Single Point
Ground
AC Interface Enclosure