Planning the electrical installation 41
When more than 4 motors need to be controlled by one drive, contact your local ABB
representative.
Selecting the power cables
General rules
Dimension the input power and motor cables according to local regulations.
• The input power and the motor cables must be able to carry the corresponding
load currents. See section Ratings on page 374 for the rated currents.
• The cable must be rated for at least 70 °C (158 °F) maximum permissible
temperature of the conductor in continuous use. For US, see section Additional
US requirements on page 43.
• The conductivity of the PE conductor must be equal to that of the phase
conductor (same cross-sectional area).
• 600 V AC cable is accepted for up to 500 V AC.
• Refer to chapter Technical data on page 373 for the EMC requirements.
A symmetrical shielded motor cable (see the figure below) must be used to meet the
EMC requirements of the CE and C-Tick marks.
A four-conductor system is allowed for input cabling, but a shielded symmetrical
cable is recommended.
Compared to a four-conductor system, the use of a symmetrical shielded cable
reduces electromagnetic emission of the whole drive system as well as motor bearing
currents and wear.
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