Cable Sizing Standards

Last updated on 2023-03-31 1 mins. to read

Many countries and organisations produce cable sizing standards. Standards, allow engineers to size cables with a  consistent approach. Using a standard also gives the engineer a fullback with which to validate any design should the need arise.


myCableEngineering incorporates the following sustained current sizing standards:

BS 7671: 2018 Requirements for Electrical Installations, Appendix 4 current carrying capacity (a.c. and d.c. low voltage cables)
ERA 69-30 Part III: 2009 Sustained current ratings for 600/1000 V & 1900/3300 V cables with 70 °C thermoplastic insulation (ac 50 Hz and dc)
ERA 69-30 Part IV: 2009 Sustained current ratings for 600/1000 V & 1900/3300 jV cables with 90 °C thermosetting insulation (ac 50 Hz and d.c)
IEC 60502-2: 2005 Cables for rated voltages m 6 kV (Um = 7,2 kV)  up to 30 kV (Um = 36 kV)  (medium voltage cables)
BS EN 50618: 2014 Electric cables for photovoltaic systems (single core  dc cables) - coming soon