What color is a typical hardwired smoke alarm connection in a residential setup?

• A. Red for alarm
• B. Green for battery
• C. White for neutral and black for hot
• D. Blue for data

Answer: (C)

In a typical hardwired smoke alarm connection in a residential setup, the standard wiring involves a combination of colors to designate specific functions. The white wire is used for the neutral connection, providing a return path for the current, while the black wire is designated for the hot connection, supplying power to the smoke alarm. This color coding helps ensure that electrical devices are connected correctly and safely, conforming to National Electrical Code (NEC) standards.

The use of white and black wires is prevalent in electrical installations, allowing electricians and homeowners to easily identify the power sources for appliances, lighting, and safety devices like smoke alarms. By adhering to these color conventions, safe operation and maintenance of electrical systems are promoted, reducing the risk of confusion and accidents.

In contrast, other colors used in the options, such as red, green, and blue, serve different purposes or are not standard for hardwired smoke alarms. Red could indicate an alarm or some emergency function in different contexts, green might refer to a battery indicator in certain devices, and blue is often associated with data connections in various electrical setups, which is not applicable in this case.