Select the tool type according to the use environment

There are many classification methods for selecting the type of hand-held electric tools according to the use environment, which can be divided into three categories according to the different ways of electric shock protection, I,II,III. In general places, class II tools shall be selected to ensure the safety of users. Class II tools have good double insulation, which can effectively prevent the occurrence of electric shock accidents. Class II or III tools shall be selected for operation in wet places or on metal structures. Class III tools shall be used in narrow places, such as boilers and metal containers. In special environment, such as hot and humid, rain and snow, and places with explosive or corrosive gas, the hand-held electric tools used must also meet the special safety requirements of the corresponding environment.