|
Welcome to the Draka UK Limited cable sizing module based upon BS7671:2008 Requirements for Electrical Installations - IEE Wiring Regulations - Seventeenth Edition. Start by selecting your required cable and phase of your supply. Also indicate in the cable selection if you are using single core or multicore cable and also if the cable is buried. There are two optional criteria for sizing buried cables. BS7671 uses a reference ground temperature of 20 degC and thermal resistivity of 2.5 K.m/W. At Draka we feel that this does not represent the soil conditions in Britain which are closer to a ground temperature of 15 degC and thermal resistivity of 1.2 K.m/W. Using ERA criteria (69-30 parts III & V) will give a result more representative of British conditions. You can check out the full report on the ERA Technology web site by
|
