Rockwell Automation 1756-xxxx ControlLogix Chassis and Power Supplies Installation Instructions - Manual (Page 48)

48 Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
Chapter 2 Install Chassis and Redundant Power Supplies
Connect the Grounding Conductors to the Ground Bus
Connect the equipment grounding conductors (functional and protective
earth ground) directly from each chassis to an individual bolt on the ground bus.
Figure 33 - Ground Bus Connection
Connect Ground Bus to Grounding-electrode System
Use a grounding-electrode conductor to connect the ground bus to the
grounding-electrode system.
At minimum, use 8.3 mm2 [8 AWG] solid or stranded-copper wire rated at 90 °C
[194 °F] or greater for the grounding-electrode conductor to guard against EMI.
The National Electrical Code specifies safety requirements for the grounding-
electrode conductor.
Figure 34 - Grounding-electrode System Connection
Item Description
1 Flat or star washer
2 Bolt
3 Equipment grounding conductor (from protective and functional earth ground connections)
4 Ground bus
5 Ground bus mounting
Item Description
1 Flat or star washer
2 Bolt
3 Equipment grounding conductor (ground lug with minimum 8.3 mm² [8 AWG] solid or stranded-
copper wire rated at 90 °C [194 °F] or greater)
2
3
4
1
5
45803
2
3
1
45803