IEC 60309-4 Ed. 2.0 b:2021
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Plugs, socket-outlets and couplers for industrial purposes – Part 4: Switched socket-outlets and connectors with or without interlock
Clause 1 of IEC 60309-1:2021 or of IEC 60309-2:2021 applies as follows:
Replace the first two paragraphs by the following:
This part of IEC 60309 applies to self-contained products primarily intended for industrial use, either indoors or outdoors that combine the following items within a single enclosure:
– a fixed or portable socket-outlet according to IEC 60309-1 or IEC 60309-2 with a rated operating voltage not exceeding 1 000 V DC or 1 000 V AC with a frequency not exceeding 500 Hz and a rated current not exceeding 800 A;
– a switching device.
These products can incorporate an interlock and/or protective devices.
These accessories are intended to be installed by instructed persons or skilled persons only.
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