area of the protective grounding conductor shall be determined in a manner which produces
a conductance equivalent to that which results from the application of this table.
Minimum cross-sectional area of the corresponding
protective conductor
S
p
(mm
2
)
Cross-sectional area of the phase conductors
S (mm
2
)
S
1)
S ≤ 16
1616 < S ≤ 35
S/235 < S
1)
To comply with standard IEC/EN 61800-5-1 (UL 61800-5-1)
• use a protective earth conductor with a minimum cross-sectional area of 10 mm
2
Cu or 16 mm
2
Al (as an alternative
when aluminum cables are permitted),
or
• use a second protective earth conductor of the same cross-sectional area as the original protective earth conductor,
or
• use a device that automatically disconnects the supply if the protective earth conductor is damaged.
If the protective earth conductor is separate (that is, it does not form part of the input power cable or the input power cable
enclosure), the minimum cross-sectional area must be:
• 2.5 mm
2
when the conductor is mechanically protected,
or
• 4 mm
2
when the conductor is not mechanically protected.
￭ Typical power cable sizes
See the technical data.
￭ Power cable types
Preferred power cable types
This section presents the preferred cable types. Make sure that the selected cable type also
complies with local/state/country electrical codes.
Use as motor cablingUse as input power cablingCable type
YesYes
Symmetrical shielded (or armored)
cable with three phase conductors
and concentric PE conductor as
shield (or armor)
YesYes
Symmetrical shielded (or armored)
cable with three phase conductors
and symmetrically constructed PE
conductor and a shield (or armor)
Electrical planning guidelines 27
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