What is the first step to verify that a circuit is de-energized?

The first step to verify that a circuit is de-energized involves ensuring that the circuit is locked out and tagged out. This practice is part of an essential safety protocol known as Lockout/Tagout (LOTO), which protects workers from the accidental energization or start-up of machines and equipment during maintenance or servicing.

By locking out and tagging out a circuit, you create a physical barrier that prevents anyone from unintentionally energizing the circuit while maintenance work is being performed. The lockout device physically prevents the operation of the switch or circuit, while the tag provides a warning to other workers that the circuit is not to be operated. This step is crucial because it establishes a clear indication that the circuit should not be energized, thereby significantly reducing the risk of electric shock or other potential hazards.

Once the circuit has been properly locked out and tagged out, additional verification steps, such as using a voltage tester, can be taken to further ensure the circuit is de-energized. However, without first implementing the lockout/tagout procedure, other methods of verification would not provide adequate safety assurance.