60 Guidelines for planning the electrical installation
Routing the cables
Route the motor cable away from other cable routes. Motor cables of several drives can be
run in parallel when installed next to each other. The motor cable, input power cable and
control cables should be installed on separate trays. Avoid long parallel runs of motor
cables with other cables in order to decrease electromagnetic interference caused by the
rapid changes in the drive output voltage.
Where control cables must cross power cables, make sure they are arranged at an angle
as near to 90 degrees as possible. Do not install extra cables through the drive.
The cable trays must have good electrical bonding to each other and to the grounding
electrodes. Aluminum tray systems can be used to improve local equalizing of potential
A diagram of the cable routing is shown below.
Separate control cable ducts
Lead 24 V and 230 V (120 V) control cables in separate ducts unless the 24 V cable is
insulated for 230 V (120 V) or insulated with an insulation sleeving for 230 V (120 V).
Drive
Motor cable
Power cable
Motor cable
Control cables
Control cables
Input power cable
min 200 mm (8 in.)
min 300 mm (12 in.)
min 500 mm (20 in.)
90 °
24 V
24 V
230 V
(120 V)
230 V
(120 V)
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