Guidelines for planning the electrical installation 57
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).
Continuous motor cable shield or enclosure for equipment on the
motor cable
To minimize the emission level when safety switches, contactors, connection boxes or
similar equipment are installed on the motor cable between the drive and the motor:
• European Union: Install the equipment in a metal enclosure with 360 degree
grounding for the shields of both the incoming and outgoing cable, or connect the
shields of the cables otherwise together.
90 °
min 500 mm (20 in.)
min 200 mm (8 in.)
min 300 mm (12 in.)
Drive
Motor cable
Power cable
Motor cable
Input power cable
Control cables
24 V
24 V
230 V
(120 V)
230 V
(120 V)
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