Oklahoma Locksmith Practice Exam

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What is the proper procedure for testing a live wire?

Touch with bare hands
Use insulated probes
Connect directly to the meter
Disconnect all circuits

The correct answer is: Use insulated probes

Using insulated probes is the proper procedure for testing a live wire because they are designed to provide a safe means of interacting with electrical systems. Insulated probes prevent accidental contact with conductive parts, which reduces the risk of electrical shock during testing. They ensure that the technician can measure voltage or continuity without the danger involved in directly touching live components. When using insulated probes, it is crucial to confirm that the insulation is intact and capable of withstanding the voltage levels involved in the circuit. This method allows for secure testing while maintaining a safe distance from the energized parts of an electrical system. The other choices do not adequately ensure safety while working with live wires. Touching a live wire with bare hands poses a significant risk of electric shock and injury. Connecting directly to a meter without proper probes can lead to dangerous shorts or inaccurate readings, and disconnecting all circuits is impractical when testing live wires, which typically need to remain energized for functional assessments.