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• Time of issue:2022-08-03
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(Summary description)Requirements for place of use
   generally, when the air humidity is less than 75%, class I or class I hand-held electric tools can be selected, but there are two additional requirements for their protection: first, there should be no less than two connection points between the metal shell and the PE line; Second, leakage protection should meet the requirements of leakage protection in wet places. If class I tools are used, the power line must be three core (single-phase tools) or four core (three-phase tools) multi strand copper core rubber sheathed flexible cable or sheathed flexible wire, and there must be no joints. The Yellow / Green two-color wire can only be used as neutral wire or grounding protection wire. When using, wear insulating gloves, insulating shoes and stand on the insulating pad.
   when operating in wet places or on metal parts, class II or class I hand-held electric tools powered by safety isolation transformers must be selected. It is strictly forbidden to use first-class hand-held electric tools. When using class II hand-held electric tools, its metal shell can be connected with PE wire, and leakage protection is set to strengthen safety protection.
   setting requirements of switch box and control box
   in addition to general places, when using hand-held electric tools such as tableware in wet places, metal frames and narrow places, the switch box and control box should be set outside the workplace and supervised by a specially assigned person.
   inspection requirements
   the shell, handle, plug, switch and load line of hand-held electric tools must be intact, and the structure of plug and power socket must be consistent to avoid confusion between conductive plug and protective plug. Insulation inspection and no-load inspection must be carried out before use. It can be used only after the insulation is qualified and the no-load operation is normal.