To ensure the line is not over loaded

To maintain the stabilised supply voltage

To protect the circuit from the leakage current

To protect the human beings from electric shock

Cut external threads on square pipe

Cut internal threads on cylindrical pipe

Cut external threads on cylindrical pipe

Cut internal threads on rectangular pipe

Outlet accessories

Safety accessories

Holding accessories

General accessories

To show the physical position of accessories

To estimate the various accessories in the circuit

To inform the reader quickly what for the circuit is designed

To show the schematic connection of the circuit for a specific task

General lighting

Motors

Air conditioner

Halogen lamp