- Reaction score
- 162
Any one know if mains interlinked battery backed up smokes will set interconnecting alarms off during power failure, if they do then how, obviously no mains power to trigger, so still got the 9v battery, someone once told me they sent 9v down the interconnecting core, ok that's a positive to other smokes but what about negative? And that means having 230v ac and 9v dc in the same cable, suppose the cable is insulated to the higher voltage though.