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The stay and impartial wire is used for current going into and out of the circuit respectively. Since the quantity of present is similar in both wires, their flux cancels one another. RCCB works on the principle of Kirchhoff’s present law, in accordance with which the amount of current getting into the circuit should be equal to the amount of present leaving the circuit. It repeatedly screens the present within the hot wire and neutral wire. Its main function is interrupting present move after a fault is detected, making it an important part in any