What type of GFCI receptacle must be installed within 1 meter of a bathtub or shower?

The requirement for a Type A GFCI receptacle to be installed within 1 meter of a bathtub or shower stems from safety standards aimed at preventing electrical shock in areas where water is present. Type A GFCI receptacles are specifically designed to detect ground faults, which can occur when electrical current leaks due to moisture.

These GFCIs are intended for use in wet or damp environments, ensuring that if a fault occurs, the device will trip quickly to protect users from potentially dangerous electric shocks. The proximity requirement to a bathtub or shower emphasizes the increased risk of electric shock in these areas, further justifying the need for this specific type of GFCI receptacle.

Other types, such as Type B, C, or D GFCIs, may have different specifications or ratings that don't align with the safety requirements for installations in wet locations. Thus, the choice of a Type A GFCI aligns with best practices in electrical safety in residential settings.