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HS&E LAEE practice question: Isolation and maintenance (2 of 6)

E. Specialist: Lifts and escalators A free question from our original HS&E LAEE practice exam. Try it, then open the answer to see why each option is right or wrong.

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An electrician is about to work on a lift controller.

What does HSE say must be done before work starts?

Choose one answer.

  1. A. Make it dead and prove it dead
  2. B. Switch it off and assume it is dead
  3. C. Check it with a wet finger
  4. D. Work on it live to save time
Show the answer and explanation

Answer: A

  • A. Right: Right. HSE says electricity supplies should be made dead and proved to be dead before work starts.
  • B. Wrong: Wrong. It must be proved dead.
  • C. Wrong: Wrong. That could kill you.
  • D. Wrong: Wrong. Don't work live if it can be avoided.

Explanation

Make the supply dead, prove it is dead, and stop it being switched back on.

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