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Connecting
4.1 Permissible line supplies
The minimum cross-section of the protective conductor
section of the line or motor feeder cable:
● Line or motor feeder cable ≤ 16 mm
⇒ Minimum cross-section of the protective conductor = cross-section of the line or motor
feeder cable
● 16 mm² < line or motor feeder cable ≤ 35 mm
⇒ Minimum cross-section of the protective conductor = 16 mm
● Line or motor feeder cable > 35 mm
⇒ Minimum cross-section of the protective conductor = ½ cross-section of the line or
motor feeder cable
Additional requirements placed on the protective conductor
● For permanent connection, the protective conductor must fulfill at least one of the
following conditions:
– The protective conductor is routed so that it is protected against damage along its
– As a conductor of a multi-conductor cable, the protective conductor has a cross-
– For an individual conductor, the protective conductor has a cross-section ≥ 10 mm²
– The protective conductor consists of 2 individual conductors with the same cross-
● When connecting a multi-core cable using an industrial plug connector according to
EN 60309, the protective conductor must have a cross-section of ≥ 2.5 mm² Cu.
● Observe the local regulations for protective conductors subject to a high leakage current
at the installation site.
40
complete length.
Cables routed inside switch cabinets or enclosed machine housings are considered to
be adequately protected against mechanical damage.
section ≥ 2.5 mm² Cu.
Cu.
section.
①
④
...
2
2
2
①
Hardware Installation Manual, 06/2020, A5E37800827C AD
depends on the cross-
2
according to IEC 60204-1:
Power Module PM240P-2
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