construction inner conductor material conpper clad aluminum wire dia. 3.55±0.04 mm insulation material physically foamed PE dia. 9.20±0.20 mm outer conductor material helically corrugated copper diameter 12.00±0.20 mm jacket material PVC or fire retardant PE diameter 13.60±0.20 mm electrical properties impedance 50±2 Ω capacitance 82 pF/m inductance 0.205 uH/m propagation velocity 81 DC breakdown voltage 2.5 insulation resistance >5000 peak power 15.6 screening attenuation >120 cut-off frequency 10.2