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영어

In the non-grounding method, the leakage current is not detected, and a small leakage current continues to flow in the enclosure of the electrical appliance and could be a cause of electric fire. In addition, in the case of alternating current, even if it is used without distinction between neutral and voltage lines, minute current leakage causes the minor clue of fire. For the safety porpose, periodic exchange of ground fault circuit interrupter and concent are required, and addition of ground fault circuit interrupter to the concent is necessary. Several electrical and structural methods of design are suggested to prevent the danger of fire.