电气设备的安装，必须请经过考试合格的电工，并严格执行有关的装置规程。如果让一些不懂行的去做，或者不按有关装置规程要来去乱扔乱接电线，就会产生许多不安全因素。
Installation of electrical equipment must be carried out by qualified electricians and the relevant equipment regulations must be strictly enforced. Many unsafe factors will arise if some people do not know how to do it, or if they do not follow the relevant device regulations and throw wiring in disorder.
例如：有的人为了图方便，敷设导线时不按规定装置，而是缠在铁丝上或挂在铁钉上，时间一长，导线的绝缘层被铁丝和铁钉磨破，就很容易造成漏电和触电又如，有的人为了省钱，家里有什么线就装什么线，不计算安全载流量，甚至在一个回路上装很多电器，前面又没有熔丝保护，中间还有根多接头，这样，一旦发生短路故障，就会扩大事故，甚至引起火灾。
For example, some people do not lay wires in accordance with the provisions of the device, but entangled in the wire or hanging on the nail, a long time, the insulation layer of the wire is broken by the wire and nail, it is easy to cause leakage and shock. For example, some people in order to save money, what wires at home will be installed, do not calculate safe current carrying. Quantity, even in a circuit with a lot of electrical appliances, there is no fuse protection in front, there is a multi-connector in the middle, so that once a short-circuit fault occurs, it will expand the accident, or even cause fire.