Some large shopping malls will install a power supply, so that they can also do normal business, and there are regular checking and maintenance for the special person. There will be some security when using electrical appliances in the mall, so as to minimize the potential safety hazard. Although the ordinary inspection work is very busy, but for the mall, it can also reduce some unnecessary trouble. The installation of power supply treatment is also higher, can bring great power, traders use of electrical appliances, there’s no menace from the rear of the rest assured that, the daily turnover is rising, and the usual maintenance work for an electrician to do good.