电路在设计时要做到位置准确、控制合理、照明度适中。现在家庭中的电器较多，与各电器相连的插座位置在设计时一定要计算准确，否则易露线头，也不安全；电路的控制要合理，如客厅吊灯采用分控开关、楼梯采用双控开关等，既节约能源，又经济实用；室内的照明度要适中，过暗视觉不好，过亮刺眼，造成光污染，且浪费能源。
The circuit should be designed with accurate position, reasonable control and moderate illumination. At present, there are many electrical appliances in the family. The position of the socket connected to each electrical appliance must be calculated accurately in the design, otherwise it is easy to expose the thread and unsafe. The control of the circuit should be reasonable, such as the sub control switch for the living room chandelier and the double control switch for the stairs, which not only saves energy, but also is economical and practical. The indoor lighting should be moderate, too dark vision is not good, too bright and dazzling, causing light pollution And waste energy.