the earth wire
is used to protect the user from any accidents that occurs using a metal
applications.if there is any problem in the application the case
itself becomes live with the possibility of electrocuting anyone who
then touches the case. discharge any stray charge on the body,if
earthing is not done then it will shock if touched.Without the earth
wire, you can get a shock. an
Earthed wire, permanently connected to the case will provide an immediate path for current
to safely flow through .. so the case remains safe to touch.
The metal is connected to
the earth wire any leakage of electric current is transferred to the
ground through the earth wire. This prevents severe electric shock to the user. That is why earthing
of the electrical appliances is necessary.
a low resistance path, the Earth connection lets a large current flow
through it when the fault occurs .. this ensures that the plug fuse will
quickly 'blow' .. breaking the circuit to the mains to complete the