Which situation would unsafe to operate the meter?

• A. More than rated voltage
• B. Case open
• C. Cover removed
• D. All of the above

Answer: (D)

Safety when using a meter depends on keeping the device closed and operating within its rated limits. If you apply more than the rated voltage, the insulation and internal components may not handle the extra stress, leading to insulation breakdown, arcing, fuse damage, or shock hazards. If the case is left open, internal parts are exposed, so you could touch live conductors or components, creating a real risk of shock, burns, or short circuits. If the cover is removed, protective barriers and spacing are lost, increasing the chance of accidental contact with energized parts and possible arcing or damage to the meter. Because any one of these situations creates a dangerous condition, all of them are unsafe to operate under. The safe practice is to ensure the meter is properly enclosed and used only within its specified voltage range.