Prescribes terms, methods of test and inspection requirements for radio interference suppression filters, including mains filter units, for use in the electrical power supply to electronic or electric equipment. To be read in conjunction with BS 9000Cross References:BS 415BS 923:Part 2BS 1701BS 1852 BS 2011BS 2045BS 3042BS 3456BS 3939BS 4727BS 5775BS 6001:Part 1BS 6217BS 6299BS 6500BS 9000:Part 1BS 9070:Section 1BS 9070:Section 2Partially replaced by BS EN 133000:1997.Incorporates the following:AMD 7509 published 15 February 1993