64 Planning the electrical installation
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.
• Make sure the cable trays have good electrical bonding to each other and to the
grounding electrodes. Aluminum tray systems can be used to improve local
equalizing of potential.
Cable routing diagram
90°
min. 200 mm (8 in)
Control cable
Motor cable
Input power or
brake resistor cable
min. 300 mm (12 in)
min. 500 mm (20 in)
Control cable
Input power cable
Drive
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