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摘 要 随着生活水平的提高，对建筑电气设计的要求也越来越高，首先要认识到设计工作适应现在、将来，给人民创造舒适、又幽雅的生活环境Abstract Along with living standard enhancement, request to construction electricity design become more and more important, first it have to adapt the present , focuses the future, we create comfortable and quiet life for the people .This design trillion positive plot twice building electrical engineering, to the security is reasonable, economical nimble principle the electrical system design must be economical nimble principle, first considered advanced, reliable equipment, achieves to the construction electricity design request. This project underground for the garage, on 5 for the business building and the hotel, the construction category is three kind of buildings, mainly the design project description and the request which provides by the national present standard handbook as well as the party of the first part are the basis, carries on the design to the entire project electrical system. In the low pressure electrical power distribution system should satisfy the power supply reliability. The electrical power distribution system selects the method which the emanant and the bough type unifies to carry on the power distribution, It achieved that it is a safe, liable, and economical reasonable design . Also it will have to achieve the far near future to unify the possibility which and the consideration will expand suitably to remain has the remainder, the fire fighting equipment and so on the important load uses the double power source power supply, the double power source mutually will throw in the terminal. The illumination partially for this building is equipped with the general lighting and the emergency lighting, at stair hall, public aisle and main access supposes emergency disperses the instruction illumination and fire escape the marker lamp. The lighting system design embarks from the science reasonable angle, and conserves energy the highly effective principle, chooses the high efficiency t