BS 4794-2.1(1977) : 1977
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
SPECIFICATION FOR CONTROL SWITCHES SWITCHING DEVICES INCLUDING CONTACTOR RELAYS FOR CONTROL & AUXILIARY CIRCUITS FOR VOLTAGES UP TO & INCLUDING 1000 V A.C. AND 1200 V D.C.
Hardcopy , PDF
08-31-1992
English
01-01-1977
Applies to push-buttons and related control switches such as foot-switches, rotary switches, etc., using contact elements like those of push-buttons. Provides additional requirements, not covered by IEC Publication 337-1, Control Switches, Part 1: General Requirements. Includes definitions and terms useful in stating desired properties of design or performance.
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