好爽轻点太大了太深了_国产伦理电影在线观看在线观看_激情丁香开心久久综合 _日本人乱人乱亲乱色视频观看

Requirements for lamps: Use moisture-proof incandescent lamps, the shell protection grade is IP54, the lamps in the cold room must be protected, and should be arranged on both sides of the top row of pipes, the lamp control switch centralized installed in the cold room outside the door away from the door of the dry place. 

Requirements of the line: Because the rubber insulated wire and cable has good low temperature resistance, the electrical line in the cold room where the temperature is lower than 0 ° C must be covered with copper core low temperature rubber insulated cable, and the cold room where the humidity is higher than 0 ° C, if the line is laid openly, copper core all-plastic cable can be used. If the pipe is hidden, copper core rubber insulated wire must be used, and both ends of the pipe should be sealed. 

Power requirements: Cold storage often uses self-provided generators as secondary load backup power. For cold storage with a nominal volume of more than 2500m3, it is required to supply power according to the secondary load, and the self-provided power supply must meet the needs of cold storage insulation. Ammonia room explosion-proof accident exhaust fan, elevator, fire pump, etc. belong to the secondary load of cold storage. And the elevator and fire pump should not share the same power supply with other loads. In addition, it is also stipulated that when the cold storage uses double power supply, the fire pump should be double power supply, and the end is self-propelled. 

Line laying requirements: The equipment room is the center of the cold storage, so the lighting of the equipment room should be considered according to the secondary load. And the equipment room in the power failure should be properly set up with the battery lamp, the emergency time is not less than half an hour, the ammonia room is high, the use of explosion-proof fluorescent lamp, the operation platform can choose explosion-proof incandescent lamp. The lighting line in the ammonia equipment room adopts copper core insulated wire with a cross-section of not less than 2 meters. Generally, dark wiring is not used, but the steel pipe is worn openly to facilitate pipeline maintenance.