Preparing for installation 29
ACH550-01 User's Manual
The figure below shows non-recommended motor cable types.
Figures courtesy of Draka NK Cables. Copyright © 2003 Draka
NK Cables.
The figure below shows the recommended conductor layout.
Symmetrical shielded cable: three-
phase conductors and a concentric or
otherwise symmetrically constructed PE
conductor, and a shield
Recommended (CE & C-Tick)
PE
conductor
and shield
A separate PE conductor is
required if the conductivity of the
cable shield is < 50% of the
conductivity of the phase
conductor.
Not allowed for motor cables
(CE & C-Tick)
Shield
PE
PE
Allowed for motor cables with
phase conductor cross section up
to 10 mm
2
.
A four-conductor system: three-phase
conductors and a protective conductor,
without a shield.
Allowed (CE & C-Tick)
Shield
Shield
To Next Page
Loading...
