Rockwell Automation 1756-xxxx ControlLogix Chassis and Power Supplies Installation Instructions - Manual (Page 47)

Rockwell Automation Publication 1756-IN005C-EN-P - March 2014 47
Install Chassis and Redundant Power Supplies Chapter 2
Connect the Protective Earth Ground on the Chassis
and Redundant Power Supply
Use 2.1 mm2 (14 AWG) solid or stranded-copper wire rated at 90 °C (194 °F) or
greater to connect the protective earth ground. Tighten the nuts on the
protective earth ground terminal stud to a torque of 16.27 N•m (12 lb•in).
Connect the functional earth ground as shown in Figure 32 .
Figure 32 - Protective Earth Ground Connection
45837
5
2
4
3a
1
3b
45836
To Ground Bus
To Ground Bus
IMPORTANT Some chassis can have a second earth ground terminal stud. Either of these
terminal studs can be used to connect the chassis to the ground bus.
Item Description
1 Star washer
2 Nut with captive star washer
3a Equipment grounding conductor (ground lug with 2.1 mm² [14 AWG] solid or stranded-
copper wire rated at 90 °C [194 °F] or greater)
3b Equipment grounding conductor (2.1 mm² [14 AWG] solid or stranded-copper wire rated
at 90 °C [194 °F] or greater)
4 Protective earth-ground terminal stud
5 Wiring terminal block (bottom terminal is protective earth ground)