Another safety measure that should be used is ground fault circuit interrupter (GFCI). GFCI is a special safety device used in all power lines. It detects the flow of electricity through and 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 the current is diverting at some point of the path. If such difference is detected, GFCI shuts down the power until the problem is solved.

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