Fire Alarm Loops? Separate sounder loop?

[alarm man]

Agreed,if it's a new system. They also leave you limited on strategy.A lot of the time if it's an upgrade existing cabling is used. A sounder control card is sat on the loop and sounders just wired off them.Not a great idea IMO but sometimes needs must

fair point,tho if your upgrading from a coventional to addressable your going to have to rewire in some way as it wont have a loop for the detection,you could add a sounder mod to power the sounders but as all the detection will need replaced anyway its better to go for loop sounders

 

[tazz]

Just been to an nursing home today to upgrade a old morley ZXA system today, which might be of interest. I did the usual download was pres 2000 so was in dos (old windows)..check download, a bit narrow over 120 devices on both 2 loops, then checked currrent load on bell circuits 1.5 amps on circuits A and B wow checked out circuits 20 sounders and 20 strobes on each bell circuit which was crashing panel..so disconnected strobes, and now bell circuits now down to 300ma. then tested batteries with ACT meter the 2.1 a/h batteries did not even register total dead. Loop calcs show 12.2 a/h was needed for system. All smoke detection was fitted outside each door at 4 to 5 inches from each door leaving 30m of uncovered space down corridors....so ne panel fiited with 17/H batteries and a V1 form issued for variantions.
his system was fitted over 12 years ago and has been maintained by the same company todate