fbhwt
Electrical Systems Inspector
- Location
- Spotsylvania,Virginia
- Occupation
- Electrical Systems Inspector
Is the circuit for the elevator car lights required to be supervised through the FACP?
In NC, No but it does have a fused disconnect in Elevator room.
And frankly why would that be monitored?
I'll assume you'll need to lable that!Thats what I asked the FD when they showed up while I was troubleshooting the lights, I traced the circuit from the elevator controller to a fused double pole disconnect(not identified), the line side was being fed by one circuit, the load side of one pole is for the lights, the other I am not sure. I shut the disconnect down to open the door and check voltage, ...
Seems odd to me, but alais I just bring in the service to what the elevator pep's need I never gave it a thought that this could happen, cab lights have there own disconnect and elevator motor has their own disconnect which was wired to the shunt.
To say that the internal aspects of an elevator wiring can do this is behond my level of knowledge.
To consider that there is any fault within the elevator would cause the shunt to operate is not
a stretch.
I'll assume you'll need to lable that!
In my case, there was a motor control contact in the elevator (motor) disconnect, which wired to the shunt, I believe through the F/A interface, in Elevator room. The cab light (fused - 10 amp) disconnect didn't interface with F/A in same room, just in to disconnect than ran over to elevator power trough.
I guess I'll ask a Elevator man next time I work with one...
The disconnect is provided just to have a place to install a lock when turning the switch is off. Fuses are not required. We typically install the switches right next to the branch circuit panel feeding them.
There are usually 2 disconnects in the elevator equipment room. One for the elevator motor, and one for the cab lights.
If the elevator shaft is sprinklered, then there is usually a shunt trip on the disconnect for the motor. And the shunt trip voltage is usually required to be monitored (often by the Fire alarm panel).
I've never heard of the Cab lights being monitored.
.....I shut the disconnect down to open the door and check voltage, turned it back on. After a few minutes I went to the lobby/entrance to the building(this is where the FACP is located)the FD was there along with the building manger. I was told by the FD that when I turned of the disconnect it tripped the shunt, he also told me that was the way it is suppose to be set up. I am still working on this and have not had a chance to review NFPA72.