41. Stationary circulation pumps for heating and hot water service systems. Specification for safety requirements Part 1, (30th October 1987) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (55 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
42. Switches for appliances. General requirements Part 1, (15th October 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (74 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
43. Tracked Changes. Electrical insulating materials used under severe ambient conditions. Test methods for evaluating resistance to tracking and erosion. (14th November 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (54 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗