Rockwell Automation Publication 750-IN001P-EN-P - April 2017 153
Chapter 4
Power Wiring
Most start-up difficulties are the result of incorrect wiring. Verify that all
wiring is done as instructed. Read and understand all items in this chapter
before you begin the installation.
Grounding Requirements
Ground impedance must conform to the requirements of national and local
industrial safety regulations and/or electrical codes. Periodically check the
integrity of all ground connections.
Recommended Grounding Scheme
Use one point (PE only) grounding scheme. Some applications can require
alternate grounding schemes, see Wiring and Grounding Guidelines for Pulse-
width Modulated (PWM) AC Drives, publication DRIVES-IN001
, for more
information. These applications include installations with long distances
between drives or drive line-ups, which could cause large potential differences
between the drive or line-up grounds.
For installations within a cabinet, use one safety ground point or ground bus
bar connected directly to building steel. All circuits including the AC input
ground conductor can be grounded independently and directly to this point/
bar.
ATTENTION: The following information is a guide for proper installation.
Rockwell Automation does not assume responsibility for the compliance or
the noncompliance to any code, national, local or otherwise for the proper
installation of this drive or associated equipment. A hazard of personal injury
and/or equipment damage exists if codes are ignored during installation.
IMPORTANT The drive Safety Ground-PE must be connected to system ground.
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