External brake resistor.5
With a conduit: Use a separate grounding PE cable (5a), or a PE conductor (5b) inside the
conduit if the conductivity of the conduit does not meet the requirements for the PE conductor
(see General guidelines (page 96)).
With a shielded cable: Use a separate grounding PE cable (5b) or a cable with a separate
PE conductor (5b) if the conductivity of the shield does not meet the requirements for the
PE conductor (see General guidelines (page 96)).
With a conduit: Use a separate grounding cable if the conduit does not meet the requirements
for the PE conductor (see General guidelines (page 96)) or there is no grounding conductor
inside the conduit.
6
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 re-
quirements for the PE conductor (see General guidelines (page 96)) or there is no symmet-
rically constructed grounding conductor in the cable (see page 98).
du/dt or common mode filter (optional), see chapter Common mode, du/dt and sine fil-
ters (page 391).
7
Note: With a shielded cable: If there is a symmetrically constructed grounding conductor on 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 (40 hp) (see General guidelines (page 96)). Connecting its fourth
conductor at the motor end increases bearing currents and causes extra wear.
For a single phase connection, use terminals L1 and L2.
Electrical installation – North America 173
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