1. BS EN50163:2005 Railway applications – supply voltages of traction systems BSI
2. BS IEC 60287:2006 Parts 1–3 Electric cables – calculation of the current rating BSI
3. BS EN50121:2007 Parts 1–5 Railway applications – electromagnetic compatibility BSI
4. BR13422:1979 50 Hz Single Phase A.C. Electrification Immunisation of Signalling and Telecommunications Systems against Electrical Interference British Railways Board
5. NR/GN/TEL/30006:2009 Overview of Electromagnetic Coupling between Traction Systems and Telecommunication Cables Network Rail