A multi-core flexible BTTRZ cable with stranded fine copper conductors and a corrugated copper sheath; the minimum bending radius is about six times the overall diameter, suiting trays, shafts and equipment rooms. It carries CCC certification and has passed combustion, withstand-voltage and insulation-resistance tests, works at up to 250 °C with a 1080 °C short-circuit allowance, and offers long life at low maintenance cost.
