Specification for low voltage switchgear and controlgear for industrial use. Terminal marking, distinctive number and distinctive letter for particular contactor relays Ingestion-build-48068 BS ISO 11121 specifies minimum

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Specification for low voltage switchgear and controlgear for industrial use. Terminal marking, distinctive number and distinctive letter for particular contactor relays Ingestion-build-48068 BS ISO 11121 specifies minimumWhat is BS 5583 Low voltage switchgear and control gear about? BS 5583 applies to contactor relays according to IEC Standard 337, having specific relative positions of the contact elements and an associated terminal numbering sequence. These particular contactor relays are designated by a distinctive number followed by a specified distinctive letter. The use of BS 5583 is recommended where terminal marking is a requirement of the relevant standard for