When must lights and receptacles be GFCI-protected?

GFCI (Ground Fault Circuit Interrupter) protection is essential in areas where electrical devices may come into contact with water, as this is when the risk of electrical shock increases significantly. Therefore, receptacles and lights installed within 6 feet of water sources, such as sinks, bathtubs, showers, and other areas where water may be present, must have GFCI protection. This requirement is outlined in the National Electrical Code (NEC) to help ensure safety by reducing the likelihood of electrical shocks in wet environments.

While it is also important to address safety in garages, attics, and outdoor lighting, those situations do not specifically mandate GFCI protection unless they are in proximity to water or meet other specific conditions set by the NEC.