These type of cables are suitable for installed and distribution boards , power stations , house connection boxes and street lighting as well as control cable for the transmission of control impulses and test data , overall where increased electrical and mechanical protection are required .These cables can be installed in open air , underground , water , indoors , and cable ducts . The concentric conductor is allowed to use as neutral protective or earthed conductor simultaneously . It is also permitted to apply as a screen for example earthed connected protection against contact .
conductor : Annealed copper of class 1 (solid) or of class 2 (stranded) according to IEC 60228 [ ISIRI (3084) ] .
insulation : PVC compound of type PVC/A .
core assembly : The cores in multi core cables are twisted together.
inner covering : The twisted cores are covered by an extruded PVC compound or a lapped helical tape .
concentric conductor: In single core cables , the concentric conductor will be applied directly over the
Insulation and in multi core cables will be applied over the inner covering .
Concentric conductor material can be used from copper conductors , copper tape
or copper conductors with copper tape .
sheath : PVC compound of type PVC/ST1 . Sheath color is normally black .
Standard : IEC 60502 [ ISIRI 3569 ] with rated voltage 600/1000 volt .