BS 951:2009 PDF

Scope: This British Standard specifies performance and mechanical requirements for clamps used to provide mechanically and electrically sound means of earthing and/or bonding, which are primarily intended for use in electrical installations for the connection of: a) earthing conductors, having a cross-sectional area in the range 2.5 mm2 to 70mm2, to earth electrode rods or other means of earthing; b) bonding conductors to metal tubes of circular cross-section that have circumferences of not less than 18.8 mm (i.e. diameters of not less than 6 mm). NOTE 1 These clamps are also suitable for electrically bonding other conductive parts, where at least one is a tube of circular cross-section. Such clamps are not intended for connection to the armour or sheath of a cable. NOTE 2 Clamps specified in this standard are intended to be used singly. NOTE 3 There is no correlation between the size of the conductor which the clamp conductor can accommodate and the size of tube to which it is intended to be fitted.

BS 951:2009 Referenced Document

BS EN 1057 Copper and copper alloys - Seamless, round copper tubes for water and gas in sanitary and heating applications
BS EN 13601 Copper and copper alloys. Copper rod, bar and wire for general electrical purposes*， 2021-01-01 Update

2009 BS 951:2009 Electrical earthing - Clamps for earthing and bonding - Specification
1999 BS 951:1999 Electrical earthing - Clamps for earthing and bonding - Specification