Appendix A
A–2
2. 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 Length – 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 the following tables for the
maximum length cable allowed for various installation techniques.
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