求翻译：施工机械和电气设备不得超负荷运转，各种电动机具必须按规定接零接地，要防雨防潮防冻，下班时拉闸；是什么意思？

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Construction of mechanical and electrical equipment must not be overburdened, various motor must be obtained in a zeroing of the ground, to rain moisture, when pulling antifreeze gates;

The construction machinery and the electrical equipment do not have the overloading operations, each kind of electrically operated machines and tools to have to meet the zero earth according to the stipulation, wants rainproof moisture-proof frostproof, gets off work when pulls the floodgate;

Construction machinery and electrical equipment shall not be overloaded, all kinds of motors with required neutral ground, rain moisture-proof antifreeze, quitting time switch;

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