ABSTRACT
All exposed conducting surfaces and other extraneous conductive parts must be connected to an earth point for safety purposes. This is to ensure that if by accident a live conductor touched these parts the resulting circuit made to earth would cause such a large fault current that a fuse or a circuit breaker would blow somewhere. If the extraneous conductive part was not connected to earth, or left ‘float ing’, it would maintain the live voltage on it until somebody came along and touched it and then that person’s body would form the conductive path to earth.
