Hello,
most non low-power electric devices have a ground pin to protect if a shortcut or something happens (Correct me if I got that wrong, already)
But how does it work? As far as I know you always need a completed circuit for electricity to flow. So how is an electric circuit closed if electricity flows to the ground?
In: Physics
The power distribution network does connect to the earth at various points. At your home near your electrical service entrance for example you will likely either have a wire connecting to a copper rod that has been driven into the ground or connecting to metal water pipes that are buried in the ground. Upstream in the power network will be similar connections to the earth.
Those connections are what allow the circuit to be completed and power to flow.
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