Planning the electrical installation 55
Routing the cables
General rules
Route the motor cable away from other cables. The motor cables of several drives
can be put in parallel next to each other. Install the motor cable, input power cable
and control cables on separate trays. Avoid long parallel runs of motor cables with
other cables 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 run extra cables through the drive.
The cable trays must have good electrical bonding with each other and with the
grounding electrodes. Aluminum tray systems can be used to improve local
equalizing of potential.
A diagram of the cable routing is shown below.
min 500 mm (20”)
Control cables
min 200 mm (8”)
min 300 mm (12”)
Supply cable
Motor cable
Drive
Braking resistor cable
min 500 mm (20”)
Motor cable
90°
90°
Supply cable
90°
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