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IEC 60335-2-70 Ed. 2.0 b:2002
Household and similar electrical appliances - Safety - Part 2-70: Particular requirements for milking machines
"Deals with milking machines for milking farm animals, for use in stalls or in the open. Examples are bucket and direct-to-can milking machines, milking pipeline machines, recorder milking machines. The rated voltage is less than 250 V for single-phase operation and 480 V for other operations."
International Electrotechnical Commission [iec]