121. Specification for motor starters for voltages up to and including 1000 V a.c. and 1200 V d.c. Rheostatic rotor starters Part 3, (31st January 1977) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (35 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
122. Specification for safety of data processing equipment. (30th June 1989) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (68 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
123. Specification for battery-operated electric fence controllers not suitable for connection to the supply mains. (1st November 1985) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (44 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
124. Specification for ballasts for discharge lamps (excluding ballasts for tubular fluorescent lamps). (30th April 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (67 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
125. Private branch exchanges for connection to public switched telephone networks run by certain public telecommunication operators. Specification for private branch exchanges with terminating stations treated as an entirety Part 2, (1st September 1998) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (19 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
126. Specification for glass fibre reinforced plastics (GRP) pipes and fittings for use for water supply or sewerage. Design and performance requirements Part 2, (29th October 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (24 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
127. Safety devices for use in hot water systems. Specification for expansion valves for pressures up to and including 10 bar Part 1, (30th November 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
128. Specification for degrees of protection of enclosures of switchgear and controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. (31st January 1977) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (15 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
129. Specification for capacitors for use in tubular fluorescent, high pressure mercury and low pressure sodium vapour discharge lamp circuits. (31st January 1979) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
130. Specification for on-load tap-changers. (31st October 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗