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Description of BS 5581:1978 1978This standard applies to control switches according to IEC Standard 337-1, with two definite positions (such as push-buttons, limit-switches and similar devices), irrespective of their construction, having terminal marking in accordance with the corresponding marking of contactor relays designated by the distinctive letter E (see EN 50011). The use of this standard is recommended where terminal marking is a requirement of the relevant standard for control switches, or is usual practice. Detailed rules for control switches based on the general rules of BS 5472:1977 [EN 50005].
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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