BS 546:SUPPLEMENT NO. 1 is a British standard that relates to 2 ampere, 5 ampere, 15 ampere, and 30 ampere plugs, fused or unfused, in which the base and cover, or either of these components, are constructed of rubber or other suitable resilient material.
BS 546:SUPPLEMENT NO. 1 on plugs made of resilient material is useful for:
The purpose of BS 546:SUPPLEMENT NO. 1 is to include plugs composed mostly of rubber or another suitably robust material that is not covered by the main specification.
BS 546:SUPPLEMENT NO. 1 comprises material specifications and tests to ensure that the plugs are made to acceptable quality standards. The mounting of all contact pins on plugs that comply with BS 546:SUPPLEMENT NO. 1 may have a slight degree of flexibility, but they will be rigid enough to make the overhang of any plugin any socket outlet of the same rating difficult to achieve without the user being aware that misuse by incorrect insertion is being attempted. BS 546:SUPPLEMENT NO. 1 provides its users with guidelines for the construction of plugs, plug pins, and terminals, states precautions against accidental contact, and gives instructions for test methods for performance and efficiency assessment.
Using BS 546:SUPPLEMENT NO. 1 guidelines ensures safety and protection, efficiency, and quality assurance for longer service life.