Recommended Power Cable Types; Power Cable Types For Limited Use; Not Allowed Power Cable Types; Motor Cable Shield - ABB ACS560 Hardware Manual

52 Planning the electrical installation

Recommended power cable types

PE
Symmetrical shielded cable with three phase conductors and a concentric PE conductor
as the shield. The shield must meet the requirements of IEC 61439-1, see
rules (page
Symmetrical shielded cable with three phase conductors and a concentric PE conductor
as the shield. A separate PE conductor is required if the shield does not meet the re-
quirements of IEC 61439-1, see
PE
PE
Symmetrical shielded cable with three phase conductors and symmetrically constructed
PE conductor, and a shield. The PE conductor must meet the requirements of IEC
61439-1, see

Power cable types for limited use

PE
A four-conductor system (three phase conductors and a protective conductor on a cable
tray) is not allowed for motor cabling (it is allowed for input cabling).
A four-conductor system (three phase conductors and a PE conductor in a PVC conduit)
is allowed for input cabling with phase conductor cross-section less than 10 mm
PVC
(8 AWG) or motors ≤ 30 kW (40 hp). Not allowed in the USA.
Corrugated or EMT cable with three phase conductors and a protective conductor is
allowed for motor cabling with phase conductor cross section less than 10 mm
EMT
or motors ≤ 30 kW (40 hp).

Not allowed power cable types

Symmetrical shielded cable with individual shields for each phase conductor is not allowed
PE
on any cable size for input or motor cabling.
￭

Motor cable shield

If the motor cable shield is used as the sole protective earth conductor of the motor, make
sure that the conductivity of the shield is sufficient. See section
above, or IEC 61439-1.
To effectively suppress radiated and conducted radio-frequency emissions, the cable shield
conductivity must be at least 1/10 of the phase conductor conductivity. The requirements
are easily met with a copper or aluminum shield. The minimum requirement of the motor
cable shield of the drive is shown below. It consists of a concentric layer of copper wires
with an open helix of copper tape or copper wire. The better and tighter the shield, the lower
the emission level and bearing currents.
50). Check with local/state/country electrical codes for allowance.
General rules (page
General rules (page 50).
General
50).
2
General rules (page 50)
2
(8 AWG)