120v Tamper Switch?

[Stallzer]

I'm darn sure the flow valve tripped the main breaker because my job at the time was testing fire alarms and I was testing the flow switch to be sure if one head popped, this would activate the fire alarm.

So when I tested the alarm by opening the test valve, the alarm triggered and the power went out!

Then I investigated and saw that the flow switch was also wired to the main breaker!

Sure sounds to me like you might have an Electrician that wired a Flow switch incorrectly. Since it's a normally open contact that's used on the switch, could it be possible that a Sparky landed both a hot and a neutral on the Flow switch ? Instead of using only the hot leg to be switched ?

 

[Billy_Bob]

Sure sounds to me like you might have an Electrician that wired a Flow switch incorrectly. Since it's a normally open contact that's used on the switch, could it be possible that a Sparky landed both a hot and a neutral on the Flow switch ? Instead of using only the hot leg to be switched ?

Boy you're really testing my memory now! This was about 20 years ago, but as I recall there were two 120V AC wires connected to the flow switch.

And there were two switches on this flow switch. The other switch was used for the low voltage fire alarm.

I don't remember if there was a common and a N.O/N.C. connection for each switch or not. And if not that, I don't remember if it would have been a N.C. or a N.O.

Anyway I think it was a shunt trip sort of like in the following diagram...
http://www.cbs.state.or.us/bcd/programs/elevator/interps/shunt_trip_wiring.pdf

 

[amps88]

Actually, nothing has been wired yet. The building is still under construction and piping has just begun. Question came up while reviewing the prints.

Recieved an answer yesterday from COE. We were correct--it was an OOPS!
That shouldn't be there! COE called it an error is contracting design. Yeah.

Thank you all for your replies!!
Amps88