What is the required height for receptacles installed in dwelling units?

The correct choice specifies that receptacles installed in dwelling units should be placed between 15 inches and 48 inches above the finished floor. This range is consistent with the National Electrical Code (NEC) requirements, which aim to ensure accessibility and safety for all occupants, including those with disabilities.

The lower limit of 15 inches helps to avoid placement too close to the ground, which could lead to damage or create a hazard, while the upper limit of 48 inches ensures that receptacles remain within easy reach for individuals of varying heights and those who may be using wheelchairs or other mobility aids. This specification supports compliance with both the NEC and the Americans with Disabilities Act (ADA), promoting the importance of creating accessible environments in residential settings.

In contrast, other height ranges listed would not align with code requirements that prioritize accessibility and safety in the installation of electrical elements.