In what scenario must all 15A and 20A, 125V, single-phase receptacles be GFCI protected?

The requirement for GFCI protection for 15A and 20A, 125V, single-phase receptacles in specific scenarios is primarily aimed at enhancing safety in environments where there is an elevated risk of electrical shock. This is particularly critical in areas where livestock is present, as these locations often involve wet or damp conditions that increase the potential for electrical hazards.

In dirt confinement areas for livestock, GFCI protection is essential due to the likelihood of moisture, which can come from the animals themselves or from the surrounding environment. Livestock confinement areas are typically dirty and may include bedding materials that can retain moisture. This creates an environment where electrical equipment may come into contact with water or wet surfaces, heightening the risk of electrical shock to animals or personnel.

GFCI devices are designed to interrupt the electrical circuit whenever they detect a ground fault, which occurs when current flows through an unintended path, such as through water or a person who is grounded. This protective measure is a critical safety requirement in livestock areas to mitigate the risks associated with accidentally electrified surfaces.

Other contexts, such as high foot traffic areas or dry confined spaces, do not inherently carry the same risks that necessitate GFCI protection. Therefore, the provision of G