Which of the following would NOT be considered a device under NEC regulations?

A speaker receptacle is commonly categorized as a receptacle outlet under the National Electrical Code (NEC), which means it functions similarly to other receptacles that allow electrical connections for devices. In the context of NEC regulations, a device is typically defined as any apparatus or instrument that performs a specific function, such as switching, controlling, or utilizing electrical energy.

On the other hand, wall switches, light fixtures, and general receptacle outlets are all explicitly recognized as devices. A wall switch is a device specifically designed to control the flow of electricity to a light fixture, while light fixtures are devices that provide illumination using lamps. Receptacle outlets are defined as devices that provide connection points for plugs that connect to larger appliances or tools.

Therefore, the choice that does not fit the category of a device under typical NEC regulations is indeed a speaker receptacle, which is more appropriately described as a type of outlet connection rather than a standalone device performing a specific electrical function on its own.