This method is the most effective way of protecting the lineworker in the event the line or piece of equipment becomes energized.

• A. Equipotential zone grounding
• B. Personal protective grounding
• C. Insulation
• D. Grounding through transformer

Answer: (A)

The main idea is to keep the whole work area at the same electrical potential so no dangerous voltage difference exists between the worker, the tools, and surrounding conductive surfaces. Equipotential zone grounding bonds all conductive objects within the zone to a single grounding reference, creating a uniform potential across the area. If the line or equipment becomes energized, this shared potential means current is far less likely to flow through the worker’s body because the path to ground is through the bonded ground network rather than through the person. This dramatically reduces both touch and step potentials and the risk of shock or arc exposure.

Personal protective grounding relies on grounding the worker directly, which can be effective but is more limited: it depends on maintaining a proper, uninterrupted grounding path to the worker and can be circumvented if the grounding is interrupted or if the worker moves differently than planned. Insulation helps prevent contact with live parts but doesn’t control potential differences in the environment if a fault occurs, and can fail or be bypassed. Grounding through a transformer doesn’t provide the same comprehensive, area-wide protection for the worker and is not the standard method for creating a protective equipotential zone.