Smoke alarms

[sparklymarkly]

Just checking to see if it's OK to feed mains powered smoke alarms from the existing lighting circuit or if they must be on a dedicated circuit to comply with regs. etc? Any help appreciated.

 

[brian.tabernor]

http://www.tlc-direct.co.uk/Technical/Regulations/Fire1.htm

1.17 The power supply for a smoke alarm system should be derived from the dwelling’s mains electricity supply................If alarm comprises no stand by power supply, [ie AC ONLY] no other electrical equipment should be connected to this circuit. [ie AC only alarms, must only be wired back to main consumer unit on dedicated circuit].


1.18 A smoke alarm, or smoke alarm system, that includes a standby power supply or supplies, [ie AC with battery back up], can operate during mains failure. It can therefore be connected to a regularly-used local lighting circuit. ...............

 

[sparklymarkly]

Thanks for the quick response Brian! Very helpful.