As extension and connecting cables for electrical devices , appliances and machinery where plugs must be permanently connected to the corresponding cables .
conductor : Annealed copper of class 5 according to IEC 60228 [ ISIRI (3084) ] .
insulation : PVC compound of type PVC/D .
core assembly :
The cores are twisted together .
The cores are laid parallel .
sheath : PVC compound of type PVC/ST5 . Sheath color is normally black or white .
Standard : 60227 IEC 52 [ ISIRI (607) 52 ] with rated voltage 300/300 volt .