GB/T 3883.305-2021 Active

This part of GB 3883 concerns tools driven by motors or electromagnets:
——Hand-held power tools (Part 2);
——Portable power tools (Part 3);
——Garden tools (Part 4).
Hereinafter referred to as "tools".
The rated voltage of AC single-phase or DC tools shall not exceed 250V, and the rated voltage of AC three-phase tools shall not exceed 440V. The maximum rated input power shall not exceed 3700W.
This part concerns the hazards caused by tools when people operate them normally and use them in a reasonably foreseeable manner.
Tools with electric heating elements are within the scope of this part. The requirements for these heating elements are specified in the relevant parts of GB 4706.
For motors that are not isolated from the power grid and whose basic insulation is not designed according to the rated voltage of the tool, the requirements are specified in Appendix B. For tools driven by motors or electromagnets powered by rechargeable batteries and the battery packs used for these tools, the requirements are specified in Appendix K. For such tools that can be operated and/or charged directly on mains or non-isolated power supplies, the requirements are specified in Appendix L.
Hand-held power tools that can be installed on a stand or workbench as fixed tools without any modification to the tools themselves are within the scope of this part and are specified in Part 3.
This part does not apply to:
——Tools used in explosive environments (dust, vapor, or gas);
——Tools for preparing and processing food;
——Medical tools;
Addition:
This document applies to portable bench grinders that can be equipped with one or two of the following accessories:
——Type 1 grinding wheels with a diameter of not more than 310 mm and a thickness of not more than 55 mm (as shown in Figure 106);
——Steel wire brush wheels with a diameter of not more than 310 mm and a thickness of not more than 55 mm;