Rockwell Automation 1336S Plus FRN 1.xx-5.xx - Manual (Page 25)

2–15 Installation/Wiring
Conduit
If metal conduit is preferred for cable distribution, the following
guidelines must be followed.
•
Drives are normally mounted in cabinets and ground connections
are made at a common ground point in the cabinet. Normal
installation of conduit provides grounded connections to both the
motor frame ground (junction box) and drive cabinet ground.
These ground connections help minimize interference. This is a
noise reduction recommendation only, and does not affect the
requirements for safety grounding (refer to pages 2–8 and
2–9).
•
No more than three sets of motor leads can be routed through a
single conduit. This will minimize “cross talk” that could reduce
the effectiveness of the noise reduction methods described. If
more than three drive/motor connections per conduit are required,
shielded cable as described above must be used. If practical, each
conduit should contain only one set of motor leads.
!
ATTENTION: To avoid a possible shock hazard
caused by induced voltages, unused wires in the
conduit must be grounded at both ends. For the same
reason, if a drive sharing a conduit is being serviced or
installed, all drives using this conduit should be
disabled. This will eliminate the possible shock hazard
from “cross coupled” drive motor leads.
Motor Lead Lengths
Installations with long cables to the motor may require the addition
of output reactors or cable terminators to limit voltage reflections at
the motor. Refer to Tables 2.E and 2.F for the maximum length cable
allowed for various installation techniques.
For installations that exceed the recommended maximum lengths
listed, contact the factory.