Red Seal Electrician Practice
Safety and work practicesQuestion 277 of 1506

What rating must the parts of a safety ground have?

  1. Enough capacity for the highest fault current until the device trips
  2. The same ampacity as the neutral conductor of the feeder
  3. Enough capacity for the normal load current of the equipment
  4. A voltage rating of at least 600 V on every clamp and cable
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Correct answer: Enough capacity for the highest fault current until the device trips

The ground must carry the highest likely current long enough for the protective device to disconnect the equipment.

Source: Canada Occupational Health and Safety Regulations (SOR/86-304), Canada Occupational Health and Safety Regulations (SOR/86-304), Part VIII: Electrical Safety

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Questions last reviewed: 18 October 2026