ABB ACQ580-07, Hardware Manual

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•
use a second protective earth conductor of the same cross-sectional area as the original protective earth
conductor,
or
•
use a device that automatically disconnects the supply if the protective earth conductor is damaged.
If the protective earth conductor is separate (that is, it does not form part of the input power cable or the input
power cable enclosure), the minimum cross-sectional area must be:
•
2.5 mm2 when the conductor is mechanically protected,
or
•
4 mm2 when the conductor is not mechanically protected.
￭
Typical power cable sizes
See the technical data.
￭
Power cable types
Preferred power cable types
This section presents the preferred cable types. Make sure that the selected cable type
also complies with local/state/country electrical codes.
Use as motor cabling Use as input power cabling Cable type
Yes Yes
„
„
PE
Symmetrical shielded (or ar-
mored) cable with three phase
conductors and concentric PE
conductor as shield (or armor)
Yes Yes
„
„
PE
Symmetrical shielded (or ar-
mored) cable with three phase
conductors and symmetrically
constructed PE conductor and
a shield (or armor)
Yes Yes
„
„
PE
Symmetrical shielded (or ar-
mored) cable with three phase
conductors and a shield (or ar-
mor), and separate PE conduct-
or/cable
1)
1) A separate PE conductor is required if the conductivity of the shield (or armor) is not sufficient for the PE use.
88 Guidelines for planning the electrical installation