Additional Grounding Requirements - Ul (Nec) - ABB ACS880 Manual

or
• a device that automatically disconnects the supply if the protective earth
conductor is damaged.
2. a connection with an industrial connector according to IEC 60309 and a
minimum protective earth conductor cross-section of 2.5 mm
multi-conductor power cable. Sufficient strain relief must be provided.
If the protective earth conductor is routed through a plug and socket, or similar means
of disconnection, it must not be possible to disconnect it unless power is
simultaneously removed.
Note: You can use power cable shields as grounding conductors only when their
conductivity is sufficient.
Additional grounding requirements – UL (NEC)
￭
This section gives grounding requirements according to standard UL 61800-5-1.
The protective earth conductor must be sized as specified in Article 250.122 and table
250.122 of the National Electric Code, ANSI/NFPA 70.
For cord-connected equipment, it must not be possible to disconnect the protective
earth conductor before power is removed.
Electrical planning guidelines 33
2
as part of a