1. Before initial use, have a certified electrician verify wiring correctness to prevent neutral-phase misconnection accidents.

2. For tools stored long-term or exposed to moisture, an electrician must measure insulation resistance before operation.

3. Never extend original power cords. Use mobile distribution boxes when power sources are distant from work areas.

4. Original plugs must not be removed or modified. Direct wire insertion into sockets is strictly prohibited.

5. Immediately cease use and replace tools with cracked housings or damaged handles.

6. Unauthorized personnel must not disassemble or repair tools.

7. All rotating components require certified guarding mechanisms.

8. Operators must wear compliant insulated personal protective equipment (PPE).

9. Ground-fault circuit interrupters (GFCIs) are mandatory at power sources.