Match each test instrument to its primary function in the field.

A non-contact voltage tester (tick tracer) is completely reliable and will never fail to detect a live circuit.

In a professional electrical contracting context, why is it standard practice to use the 'trip button' on a GFCI receptacle tester during final-circuit verification?

A field electrician is replacing an old receptacle and verifying the new installation. Arrange the steps to show how they should apply their standard test instruments in a safe and logical workflow.

An electrical contractor is analyzing a near-miss incident where an apprentice was exposed to a live circuit after their non-contact voltage tester (tick tracer) failed to alert them. By breaking down the tool's mechanics, the contractor identifies the root cause: because these testers detect voltage without touching conductors, they are susceptible to providing false _____. To prevent future hazards, the contractor mandates that field training explicitly cover this limitation.

A field technician reports the following procedure after installing a new GFCI-protected receptacle at a customer's home:

1. Used a non-contact voltage tester to confirm the circuit was de-energized before starting work.
2. Completed the receptacle installation.
3. Restored power and used the non-contact voltage tester to confirm voltage was present at the new outlet.
4. Told the customer the job was complete.

As the contractor reviewing this report, which of the following is the most critical deficiency in the technician's verification procedure?