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What are the possible consequences of not connecting ground wire?

scanning: author: from: time:2022-06-08

A: Personal injury accidents may occur. If the metal shell of the rice cooker is grounded, when a single-phase ground fault occurs, both the RCD and the main switch will trip for protection. Of course, the protection current of the main switch will be larger. If the metal casing of the rice cooker is not grounded, when a single-phase grounding fault occurs, neither the RCD nor the main switch will trip for protection, so personal injury may occur.