... 7×0.50, 7×0.32, 19×0.412. Conductive plastic layer: common PTC, fire-retardant PTC, fluorin-contained PTC3. Insulation ... polyolefin, fire-retardant polyolefin, fluorin-contained polyolefin, fluorin material4. Shielding layer: soft round tinning copper braid, covering density: 80%5. ... -proof & protective type, test for 1 min between shielding layer and conductive wire core in 2,500VDC in 20°C ...