541. Electric cables. Calculation of the current rating. Current rating equations (100% load factor) and calculation of losses. Sheath eddy current loss factors for two circuits in flat formation Part 1.2, (15th July 1994) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (28 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
542. Specification for underground loudspeaker communication systems in coal mines. (29th April 1983) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
543. Safety of hand-held electric motor operated tools. General requirements Part 1, (15th August 1996) 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) ↗
544. Essential requirements for connection of terminal equipment to analogue interfaces of public switched telecommunications networks using either the earth calling, the loop calling, disconnect clearing, the loop calling, guarded clearing or the loop calling, unguarded clearing signalling method. (15th May 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (52 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
545. Electrical apparatus for use in the presence of combustible dust. Test methods. Method for determining the electrical resistivity of dust in layers Part 2-2, (15th March 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
546. Overvoltage protection for photovoltaic (PV) power generating systems. Guide. (15th April 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
547. Connectors for analogue telecommunication interfaces. Specification for plugs Part 1, (15th March 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (18 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
548. Class 0.5, 1 and 2 alternating-current watthour meters. (15th September 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (30 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
549. Identification card systems. Telecommunications applications. Integrated circuit(s) card payphone. (15th April 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
550. Methods of measurement on receiving antennas for satellite broadcast transmissions in the 12 GHz band. Electrical measurements on DBS receiving antennas Part 1, (15th August 1995) 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) ↗