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在电气安装工程中,概算定额工程量的计算方法把管线区分为干线和支线两类,另设支路管线,支路管线的工程量按出线口计算,而干线敷设的工程量都按实际长度计量。建筑物内干线与支线的划分方法是(图1);从进户线到各层、段末端箱、柜、盘、台以及它们之间的管线为干线;从末端箱、柜、盘、台至各处用电器具的管线为支路管线。降压起动设备至配电箱为干线,至电动机为支线。照明平面图中,从进户线至总配电箱,总配电箱至各层分电箱,以及
In the electrical installation project, the calculation method of the estimated fixed-quantity engineering quantity divides the pipeline into two types of trunk lines and branch lines, and separates the branch pipelines. The engineering quantity of the branch pipelines is calculated according to the outlets, and the construction quantity of the trunk lines is based on the actual length. Measurement. The division method of trunk lines and branch lines in a building is (Figure 1); from the entrance line to each floor, the end of the box, cabinets, plates, tables, and the pipelines between them are trunk lines; from the end boxes, cabinets, plates, tables The pipelines for electrical appliances everywhere are branch lines. Step-down starting equipment to the distribution box is a trunk line, and the motor is a branch line. In the lighting plan, from the entrance line to the main distribution box, the main distribution box to the distribution box, and