Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 72)

Publication 8720MC-IN001D-EN-P — December 2002
3-10 Connecting Your 8720MC
Connecting the Drive to the System Ground
Connect the drive to earth ground via the power ground (PE) terminal
provided on the power terminal block (TB1) as shown in Figure 3.4.
You should inspect and test the ground impedance at appropriate and
regular intervals.
Note: Even if you have a floating secondary, the building must have a
safety (earth) ground.
In any cabinet, you should use a single, low-impedance ground point
or ground bus bar. You should:
• Ground all circuits independently and directly to this ground point
or bus bar.
• Directly connect the AC supply ground conductor to this ground
point or bus bar.
ATTENTION
!
The National Electrical Code contains grounding
requirements, conventions, and definitions. Follow
all applicable local codes and regulations to safely
ground your system. Refer to Appendix B for the
8720MC interconnect diagrams.