Where is GFCI protection required for 125V, single-phase 15 and 20A receptacles?

GFCI (Ground Fault Circuit Interrupter) protection is essential in specific areas where receptacles are exposed to water or damp conditions, as it greatly reduces the risk of electrical shock. In dwelling units, GFCI protection is mandated for 125V, single-phase 15 and 20A receptacles in specific locations, such as bathrooms, kitchens, garages, and outdoors. The National Electrical Code (NEC) specifies these areas due to the higher risk of moisture and the potential for an electrical fault, which could lead to serious hazards.

While guest rooms in hotels and certain areas of office buildings may have their own requirements for safety, the broad requirement for GFCI protection linked to residential settings makes the dwelling units choice particularly relevant. This standard recognizes the unique risks associated with residential environments, thus emphasizing the importance of GFCI protections in these areas. Therefore, dwelling units have a clear directive for GFCI installation, aligning with NEC rules, making this option correct.