ABB ACH550-01 User Manual page 42

The figure below shows non-recommended motor cable types.
Figures courtesy of NK cables. Copyright © 2003 NK cables.
The figure below shows the recommended conductor layout.
Recommended (CE & C-Tick)
Symmetrical shielded cable: three-
phase conductors and a concentric or
otherwise symmetrically constructed PE
conductor, and a shield
PE
conductor
and shield
Not allowed for motor cables
(CE & C-Tick)
A four-conductor system: three-phase
conductors and a protective conductor,
without a shield.
PE
30
ACH550 User's Manual
Allowed (CE & C-Tick)
A separate PE conductor is
required if the conductivity of the
cable shield is < 50% of the
conductivity of the phase
conductor.
Shield
Allowed for motor cables with
phase conductor cross section up
2
to 10 mm
Preparing for installation
Shield
PE
Shield
.