Table 5 Equal Size Conductor Cables PVC ins. to …

1 Table 5 Equal size Conductor Cables PVC ins. to BS3646, operating at 70oC. xlpe ins. to BS5467 & 6724, operating at 90oCPhase Conduc-tor sizeMinimum CSA ofprotective con-ductor to table54 GNearest avail-able cable CSAto Table 54 GActual Steel Armour CSA to BS 6346 Copper Equivalent CSA from K2/K1 x - SWA - PVC Cables . Steel Armour CSA to BS 5467 & 6724 Copper Equivalent CSA from K2/K1 x sectionXLPE - SWA -PVC Cables . based on the following:-Copper equivalent CSA = K2 x SWA section K1 Copper(Cu)Copper(Cu)Copper (Cu)2 Core3 Core4 Core2 Core3 Core4 CoreWhere K1 is the phase Conductor K value from BS7671 Table mmSq mmSq mmStCuStCuStCuStCuStCuStCuAnd K2 is the protective Conductor (SWA)

2 K value from BS 7671 Table is intended purely as a guide only and disconnection times up to and including 5 other times consult the cable Table is not to be used as a substitute for calculation and circuit formula used above is transposed from that given 7671 Table ..by calculation refers to proper circuit design use of the Adiabatic this column tocompare with copper equiva-lents shown shows SWA too small to beused as protective from Table 54G(but may comply by calculation)Green showsSWA adequateto Table 54 GRed shows SWA too small to beused as protective from Table 54G(but may comply by calculation)Green showsSWA adequateto Table 54 GFor reduced neutral and single core aluminium wire armoured Cables , refer toBS 6346 (PVC) & BS 5467 or BS 6724 ( xlpe )

3 For armour wire totalcross sectional area.