These include plenum cable and rising cable, in which one or more current carriers is surrounded by insulation and the whole is surrounded by PVC sheathing; {HEAD ~ electric wires} in which {TAIL ~ one or more current carriers} are surrounded by the PVC formulation which acts as both insulation and protective sheathing; and optical fibres 
These include plenum cable and rising cable , in which one or more current carriers is surrounded by insulation and the whole is surrounded by PVC sheathing ; { HEAD ~ electric wires } in which { TAIL ~ one or more current carriers } are surrounded by the PVC formulation which acts as both insulation and protective sheathing ; and optical fibres
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