ABB ACH580-01 Series, Hardware Manual

Page: 179 / 396

Electrical installation – North America 179
UL
NEC
6 With a conduit: Use a separate grounding cable if the conduit does not meet the
requirements for the PE conductor (see page 89 ) or there is no grounding conductor inside
the conduit.
Note: ABB prefers the use of a symmetrical shielded motor cable (VFD cable), see the
note at the bottom of the table.
With a shielded cable: Use a separate grounding cable if the shield does not meet the
requirements for the PE conductor (see page
89 ) or there is no symmetrically constructed
grounding conductor in the cable (see page 93 ).
7 d u /d t or common mode filter (optional), see page 389 .
Note:
With a shielded cable: If there is a symmetrical grounding conductor in the motor cable in
addition to the conductive shield, connect the grounding conductor to the grounding terminal
at the drive and motor ends.
ABB does not recommend an asymmetrically constructed motor cable or a conduit for motor
cabling for motors above 30 kW (see page
89 ). Connecting its fourth conductor at the motor
end increases bearing currents and causes extra wear.