Rockwell Automation 1336Z SPIDER - FRN 2.xxx-5.xxx - Manual (Page 17)

General Installation for All Drives 2–7
Motor Cable
The ground conductor of the motor cable (drive end) must be
connected directly to the drive ground (PE) terminal (see General
Grounding on page 2–8), not to the enclosure bus bar. Grounding
directly to the drive (and filter, if installed) can provide a direct route
for high frequency current returning from the motor frame and ground
conductor. At the motor end, the ground conductor should also be
connected to the motor case ground.
If shielded or armored cables are used, the shield/armor should also
be grounded at both ends as described above.
Discrete Control and Signal Wiring
The control and signal wiring must be grounded at the drive (see
General Grounding on page 2–8). If shielded control and signal wires
are used, the shield must also be grounded at the drive end only.
If the control and signal wires are short, and contained within a
cabinet which has no sensitive circuits, the use of shielded control and
signal wiring may not be necessary, but is always recommended.
Safety Ground - PE (Potential Earth)
This is the safety ground required by code. This point must be
connected to adjacent building steel (girder, joist) or a floor ground
rod, provided grounding points comply with national or local electric
code regulations. The line input PE wire must be connected to the
bottom PE terminal (see General Grounding on page 2–8). If a
cabinet ground bus is used, refer to Grounding on page 2–6.
RFI Filter
Important: Using the integral RFI filter may result in relatively high
ground leakage currents. Surge suppression devices are
incorporated in the drive. The filter must be solidly
grounded. Grounding must not rely on flexible cables and
should not include any form of plug or socket that would
permit inadvertent disconnection. The integrity of this
connection should be periodically checked.