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fire alarm flow switch #181826
11/02/08 12:38 PM
11/02/08 12:38 PM
watersparkfalls  Offline OP
Member
Joined: Mar 2005
Posts: 233
Washington...Not DC
My church is building a new multi-purpose building.
We are just about done and now are trying to save money by doing some of the work ourselves.

The fire alarm company has tied an addressable module to the flow switch but wont do the 120 volt bell, I havent wired these type of flow switches before(only 120 volt without addressable)and not sure what to do. It seems like a code violation to wire it as I have in the past bring hot to one side of contactor(NC) and switch leg to the other, because mixing low voltage and 120 voltage in the same jbox would requirie a divider. Since this is a factory assembled UL product is this an excepion? Or do I need to get a low voltage relay and wire the coil from the fire alarm low voltage power?

Thanks,
H20

2017 / 2014 NEC & Related Books and Study Guides
Re: fire alarm flow switch [Re: watersparkfalls] #181829
11/02/08 02:04 PM
11/02/08 02:04 PM
L
leland  Offline
Member
Joined: Aug 2007
Posts: 853
Lowell area, Ma. USA
I've done it many times with no problems or issues.
Label the devce cover to alert others of the 120 vAC.

The potter flows have 2 sets of contacts. connect the 120 switch leg (for the bell) to 1 set and the other set to the module. Use the same voltage rateing for all conductors and you should be fine.

(I prefer "volenteering" as opposed to saveing money.):)

Last edited by leland; 11/02/08 02:06 PM. Reason: comment:
Re: fire alarm flow switch [Re: leland] #183408
01/08/09 07:09 PM
01/08/09 07:09 PM
J
jdotagain  Offline
New Member
Joined: Jan 2009
Posts: 1
tx
I found there best way to check out info on a fire alarm was at fireandsmokealarms.net . They have all the info you would need to make your fire alarm purchase a good one!


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