State functions of ; i) Cable box ii) Guard wire iii) Shackle insulator iv) Stay wire used in service connection

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i) Function of Cable box: To hold and inspect incoming and outgoing terminals 

ii) Function of Guard wire : A grounded conductor placed beneath an overhead transmission line in order to ground the line, in case it breaks, before reaching the ground.

iii) Function of Shackle insulator: Used of shackle insulator always on distribution systems the main function of an insulator is support and insulate.It is at corner or end points. 

iv) Function of Stay wire used in service connection: To give mechanical Support to pole, line and prevent leakage current if any

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