Final answer:
Before testing or repairing electrical equipment, ensure circuits are de-energized with LOTO and utilize meters correctly starting on the highest scale. Understand appliance ampere ratings, use safety devices like three-wire systems, and follow safety regulations to prevent hazards and ensure proper functioning of the equipment.
Step-by-step explanation:
Before testing and following repair actions of electrical equipment, safety is of utmost importance. You should first ensure that all circuits are de-energized and properly locked out and tagged out (LOTO) to prevent accidental energizing.
Use meters to measure electrical quantities, starting with the highest scale to avoid meter damage. When measuring voltage and current, do so in a safe manner and use appropriate personal protective equipment.
Most electrical appliances are rated in amperes, and an understanding of this is critical to conduct repairs safely. Utilize the specifications of fuses and circuit breakers to prevent overcurrent situations. Electrical safety systems, such as the three-wire system with live/hot, neutral, and earth/ground wires, protect against thermal and shock hazards. It is important to understand and adhere to these safety mechanisms.
Finally, check the integrity of insulators and use appropriate testing methods, such as touching a power line with the back of the hand as a final check for the absence of voltage. All actions should comply with standard safety regulations and procedures to prevent accidents and ensure the successful operation of the equipment after repair.