Another safety measure that should be used is the ground fault circuit interrupter (GFCI). It is a special safety device used in all power lines. It detects the flow of electricity through an unintended path, for example, water or human body. It measures the difference between the current sent from a source and received on the other side. If these values are not the same, that means that at some point, the current is diverting from the path. If such difference is detected, GFCI shuts down the power until the problem is solved.

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