BS EN 50620:2017 pdf free.ELECTRIC CABLES - CHARGING CABLES FOR ELECTRIC VEHICLES (BT(DE/NOT)259). BS EN 50620 specifies design, dimensions and test requirements for halogen-free cables with extruded insulation and sheath having a voltage rating of up to and including 4501750 V for flexible applications under severe condition for the power supply between the electricity supply point or the charging station...