What are common Lockout/Tagout (LOTO) steps used before servicing LV equipment?

• A. Identify energy sources, isolate power, apply lock and tag.
• B. Verify absence of voltage with a live tester.
• C. Keep locks in place during maintenance but do not verify voltage.
• D. Proceed to service while equipment is energized.

Answer: (A)

Controlling hazardous energy before work means you first identify all energy sources that could energize the equipment, then isolate the power from those sources, and finally apply a lock and a tag. This combination creates a secured condition: the equipment cannot be re-energized until the lock and tag are removed by the authorized person, preventing accidental startup during maintenance. In LV work, this sequence is fundamental because it directly stops power flow and communicates responsibility, which protects the worker from unexpected energization.

After these steps, you would typically confirm there is no energy present before starting the service, using a proper voltage tester, but the essential pre-work protection is established by identifying sources, isolating power, and applying lock and tag. Verifying absence of voltage without first isolating and locking leaves a risk, and attempting to service energized equipment is unsafe.