By British Standards Institution
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Extra info for 13 A Plugs, Socket-outlets and Adaptors: Specification for 13 A Switched and Unswitched Socket-outlets BS 1363
During the test no damage impairing the further use of the screwed connection shall occur. NOTE It is essential that the shape of the blade of the test screwdriver suits the head of the screw being tested and that the screw is not tightened in jerks. 2 Thread-cutting and/or thread-forming screws shall not be used for the making of current-carrying or earth continuity connections. NOTE Thread-forming screws may be used to provide earthing continuity, provided that it is not necessary to disturb the connection in normal use and at least two screws are used for each connection.
X X Example 5 Example 5 Condition: Rule: Path under consideration includes an uncemented joint with grooves less than “X” mm wide on each side. Creepage and clearance path is the “line of sight” distance shown. X X Example 6 Example 6 Condition: Rule: © BSI 9 October 2003 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Path under consideration includes an uncemented joint with grooves equal to or more than “X” mm wide on each side.
Screws shall not be of insulating material if their replacement by a metal screw would affect the safety or performance requirements of the socket-outlet. Contact pressure in electrical connections within the socket-outlet and between the socket-outlet and the cable or flexible cord connected to it shall not be transmitted through insulating material other than ceramic, pure mica or other material with characteristics no less suitable, unless there is sufficient resiliency in the metallic parts to compensate for any possible shrinkage or yielding of the insulating material.
13 A Plugs, Socket-outlets and Adaptors: Specification for 13 A Switched and Unswitched Socket-outlets BS 1363 by British Standards Institution