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GFCI (Ground Fault Circuit Interrupter) protection requirements are indeed applicable to both residential and commercial settings. The National Electrical Code outlines specific circumstances under which GFCIs must be used to enhance electrical safety. This protection is crucial in areas where there is a higher risk of electric shock, such as in wet locations, kitchens, bathrooms, and outdoor settings.

The inclusion of GFCI requirements in commercial applications stems from the need to ensure safety for both workers and the public, not just residents in a home. As electrical systems in commercial environments can also include wet locations, GFCIs play a crucial role in preventing electrical hazards in these spaces as well.

Overall, the necessity for GFCI protection across both residential and commercial settings underscores the commitment to safety standards in electrical installations, aiming to protect individuals from the dangers of ground faults regardless of the setting.