Is GFCI protection required for 125-volt, single-phase receptacles on construction sites?

GFCI protection is a crucial safety measure specifically in environments like construction sites where the potential for electrical hazards is heightened. The requirement for GFCI protection for 125-volt, single-phase receptacles on construction sites is based on the need to prevent electrical shock accidents, especially in wet or damp conditions that are commonly encountered at these sites.

While the choice stating "D" may seem ambiguous, it aligns with the understanding that GFCI protection is indeed mandated in these specific circumstances. This requirement enhances worker safety by reducing the risk of ground faults, which can occur when there is a fault in the wiring or equipment. The National Electrical Code (NEC) specifies that all 125-volt and 15- or 20-ampere receptacles in construction sites require GFCI protection regardless of their use, reinforcing the protective design of electrical installations in these potentially hazardous environments.

In summary, the necessity of GFCI protection for receptacles on construction sites represents a proactive measure to safeguard the health and safety of workers, thereby validating the choice that all receptacles require this protection in such settings.