What power source do most fire alarm systems typically utilize?

Most fire alarm systems typically utilize a 110-volt line as their primary power source. The 110-volt line provides a consistent and reliable electrical supply necessary for the operation of the various components of the system, such as smoke detectors, control panels, and alarms. This voltage is standard in residential and commercial buildings across many regions, facilitating easier integration into existing electrical infrastructure.

While battery backup is important for ensuring the system remains operational during a power outage, it is generally secondary to the primary power source. Solar power, although increasingly popular for various applications, is not a widespread choice for fire alarm systems due to considerations regarding reliability and performance within indoor environments. Similarly, a 220-volt line is typically used for larger appliances and industrial equipment rather than the low voltage needs of most fire alarm systems. Thus, the use of a 110-volt line is both practical and effective for fire alarm functionality and safety.