What is the required height for the receptacles above finished floor (AFF)?

The required height for receptacles, when installed above finished floor (AFF), is typically set at 42 inches for specific applications, such as in commercial environments where ADA (Americans with Disabilities Act) guidelines apply. This height ensures accessibility for individuals using wheelchairs, making it compliant with regulations intended to facilitate use by people with disabilities.

Installing receptacles at this height minimizes the need for bending or reaching down, promoting safety and ease of access. It is also aligned with the expected use cases in workplace and public situations, where receptacles may be more frequently accessed for various electronic devices and equipment.

Other heights, such as 36 inches, may be more common in residential settings, while 48 inches and 54 inches might be seen in specialized installation requirements or certain specific commercial environments, but they do not meet the standard specifications for general accessibility as effectively as 42 inches does in most contexts.