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第七章接地问题接大地（Earth）接大地是指利用大地作为电路的一部分，来维系电气设备、器具的安全，并使电路简单化。如果电器外壳接大地，当电路和外壳间发生绝缘损坏或短路，足够大的电流经过接地线和大地流回电源时，可使接在电源线上的断路器或熔断器断开，以保证安全。接
Chapter VII Grounding Problems Earthing Grounding refers to the use of the earth as a part of the circuit to maintain the safety of electrical equipment and appliances and simplify the circuit. If the electrical enclosure is connected to earth, when the insulation between the electrical circuit and the enclosure is damaged or short-circuited, a large enough current flows through the grounding line and the earth back to the power supply to disconnect the circuit breaker or the fuse connected to the power line to ensure safety . Pick up