1. BS EN IEC 61156-13. Multicore and symmetrical pair/quad cables for digital communications. Part 13. Symmetrical single pair cables with transmission characteristics up to 20 MHz. Horizontal floor wiring. Sectional specification (7th May 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗