对PE线在TN系统与TT系统中的作用进行了分析，讨论了住宅内照明回路的特点及增加PE线后的优点。
The use of PE line in TN system and TT system is analyzed, and the characteristics of lighting return circuit in residence and the advantages of adding PE line are discussed.
采用优质电子元件组装，主回路设有多重保护；照明开关、喷漆、升温喷漆、烤漆温度、时间设定、故障指示灯。
Control system: lighting switch, spray paint, spray paint of temperature, drying temperature and time setting, emergency stop, limit the warm, failure alarm.
安装电机、变压器、控制器和照明器材到指定位置，并根据图纸描述完成整个回路。
Mounts motors, transformers, controllers and lighting fixtures into position and completes circuits according to diagram specifications.
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