Red Seal Electrician Practice
Safety and work practicesQuestion 263 of 1506

Before work or a live test starts on isolated equipment, how must the isolation be confirmed?

  1. By reading the panel schedule
  2. By checking that the breaker handle is off
  3. By test
  4. By asking the last person who worked on it
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Correct answer: By test

The regulation requires a test to confirm isolation. Visual checks of devices are required as well, but they do not replace the test.

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

Practice safety and work practices

Questions last reviewed: 18 October 2026