【正文】 often lead to errors. Such as electrical lighting design of a project, the designer in the system diagram of the circuit breaker marked only the symbol next to the 39。 Naishi Haig39。 a Council Office Building in the offices and meeting rooms designed to illumination to only 70 ~ 80LX, puter room to only abou t 100h or so. Nor was it even illumination standard value stipulated by the state (respectively, 150h and 200k) half. The relevant professional interface design documents is unclear, do not follow the provisions of coordination is epidemic could easily lead to the construction error For example, the widespread use of structural steel at present, as mine Jieshan Qi, Yin Xiaxian and grounding and equipotential bonding devices, electrical works required to be connected plotted points, embedded parts, indicating laying means and technical measures (such as welding requirements, etc.)。 Another example of a residential district because the original design for the drainage and electrical professionals unable to agree on the early pletion of the project w hen it found that almost each examination room air conditioner installed within the Department reserved for drainage openi ngs and holes through walls and airconditioning power outlets are located on both sides of the wall outside the window, that is airconditioning installation location is not in the same place with the socket, socket can not be used, had to rework reload. 3 Conclusion Design documents and construction supervision is the main basis for design could seriously implement national regulations, design documents the depth and in close collaboration with relevant professional problems, and so have a direct impact on project quality. In recent years, quality of design of landslide phenomenon has bee an indisputable fact that reasons could be manifold, such as the design of vicious market petition, lower prices, forcing design units to reduce inputs in o rder to reduce costs, etc. This article does not intend to explore. Construction and Supervision of the above only from the angle of the design of mon ills. And such is not a chronic illness or chronic problems, as long as a little attention to design units, such as organizational design to seriously studyrelated design specifications to enhance the design process management, attention to design and countersigned and review can be a permanent solution. The engineering supervision and project constructio n will benefit. 中原工學院畢業(yè)設計（論文）譯文 13 。 multiple fire detectors by ventilation, smoke exhaust pipe block。refer to page XX Atlas XX39。, devices in the table is no exception, but have not specified the name and details of parameters, the construction unit interpreted as a regular 20A circuit breaker, because to find less than the number of products under a separate procure ment of another circuit breaker. The equipment and materials after the inspection by the supervisors check when the original 39。construction and engineering design documentation, the depth of the provisions39。, we can see that civil power distribution system of the trunk, branch lines and extensions of the wire crosssection principle, should be selected for N or PENline crosssection and phase section of the same line. However, pretrial supervision plans found that there are still a large number of civil power distribution design is still in use 80 years ago, the practice has been introduced, choice of N or PENline crosssection is still phase 1 / 2 or even 1 / 4 to 1 / 3. This is the most mon electrical design safety problems. Again, with regard to the choice of variable distribution of the location of the relevant design specifications have clearly suggested that we should consider 39。 0 area electrical equipment should be used 1Px8 protection level, a District should be 1Px5 so. Another example is lowvoltage distribution lines, civil section of choice. Because the vast majori