ABB ACH180-04S - Not Allowed Power Cable Types; Additional Guidelines - North America

1/10 of the phase conductor conductivity. The effectiveness of the shield can be evaluated based on
the shield inductance, which must be low and only slightly dependent on frequency. The requirements
are easily met with a copper or aluminum shield/armor. The cross-section of a steel shield must be
ample and the shield helix must have a low gradient. A galvanized steel shield has a better high-frequency
conductivity than a non-galvanized steel shield.
Not allowed power cable types
Use as motor cabling and as
brake resistor cabling
Use as input power cablingCable type
NoNo


PE
Symmetrical shielded cable
with individual shields for
each phase conductor
￭
Additional guidelines – North America
ABB recommends the use of metallic conduit for power wiring. ABB also
recommends the use of symmetrical shielded VFD cable between drive and
motor(s).
This table shows examples of methods for wiring the drive. Refer to NFPA 70 (NEC)
along with state and local codes for the appropriate methods for your application.
NotesWiring method
Conduit - Metallic
1) 2)
Prefer symmetrical shielded VFD cable.
Electrical metallic tubing: Type EMT
Use separate conduit run for each motor.Rigid metal conduit: Type RMC
Do not run input power wiring and motor
wiring in the same conduit.
Liquid-tight flexible metal electrical conduit:
Type LFMC
Conduit - Non-metallic
2) 3)
Prefer symmetrical shielded VFD cable.
Liquid-tight flexible non-metallic conduit:
Type LFNC
Use separate conduit run for each motor.
Do not run input power wiring and motor
wiring in the same conduit.
Guidelines for planning the electrical installation 47