Final answer:
The fewest number of convenience receptacles in an atrium is specified in the building code defined by the National Electrical Code (NEC), which provides guidelines to ensure safety and functionality.
Step-by-step explanation:
The number of convenience receptacles that can be installed in the plan view of an atrium in a large home, according to the National Electrical Code (NEC), is specified in the building code. The NEC provides guidelines for the safe installation of electrical wiring and equipment, including the requirement for a minimum number of electrical outlets in various spaces within a home. These requirements are crucial to ensure safety and functionality and are not determined by the size of the furniture, irrelevant for safety considerations, or left solely to the discretion of the homeowner.