Whether the smoke detector needs to be connected to the main power supply depends on the situation, There is no requirement to connect to the mains power supply.
If you plan to rent out a house, then yes, they must be powered by mains electricity and interconnected, which means that if one alarm goes off, all alarms will go off. If you don’t rent it out, it’s up to you to decide, and it’s best to use mains power.
Most households use battery powered smoke alarms. However, using a smoke alarm connected to a power source is safer as the battery will run out. Most modern high-quality smoke alarms emit a beep sound when the battery is about to run out, simply refer to the manufacturer’s instructions. If you are in an industrial or commercial place, such as an office, I believe that connecting to a power source is necessary.
Mains-powered smoke alarms are directly connected to the building’s electrical wiring. They typically have a permanent connection to the mains power supply and also include a battery backup for use during power outages. This provides a reliable power source for constant operation and allows the alarm to function even if the main power is interrupted.
Detailed Explanation of Mains-Powered Alarms
Mains-powered alarms:
These alarms are plugged into a wall outlet or hardwired into the building’s electrical system.
Battery backup:
Even with mains power, these alarms have a battery backup, usually a 9-volt alkaline battery or a 10-year lithium battery. This ensures that the alarm will continue to operate during a power outage.
Interconnection:
Many mains-powered alarms are designed to be interconnected, meaning that if one alarm detects smoke, all interconnected smoke alarms will sound.
Installation:
Mains-powered alarms usually require professional installation and should be connected to a permanent live feed, such as a lighting circuit.
Testing and maintenance:
It’s important to test mains-powered alarms regularly and replace them every 10 years, even if they’re mains-wired.
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