combination of activities including work activities necessary to permit an electrical installation to function Note 1 to entry: The operation includes such matters as switching, controlling, monitoring and maintenance as well as both electrical work and non-electrical work. Note 2 to entry: This entry was numbered 651-01-05 in IEC 60050-651:1999. It has been modified as follows: the reference to IEC 60050-151 has been added.
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