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Elevator Disconnects #153770 11/24/03 11:09 PM
Joined: Aug 2001
Posts: 599
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Nick Offline OP
Member
I was told today that some elevator inspectors will not allow the shunt trip breaker (for shutting down elevator power) in the machine room. Is this an elevator code?

Building Codes & Related References
Re: Elevator Disconnects #153771 11/25/03 06:32 PM
Joined: May 2002
Posts: 1,716
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Roger Offline
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Nick, we had an elevator inspector bring this same thing up a few years back, but it didn't go anywhere. We still put the shunt trip breaker in the machine room. If I remember correctly the misinterpretation came from the term "selective coordination" and the shunt trip being at the start of the elevator feeder, which would put it at the distribution point.

I will look for better info tomorrow if somebody doesn't come forward first.

Roger

Re: Elevator Disconnects #153772 11/27/03 11:43 AM
Joined: Aug 2001
Posts: 599
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Nick Offline OP
Member
Thanks Roger,
Any further info would be appreciated. It has not come up yet by the inspector but it was brought up by our fire alarm sub. He couldn't tell me what code it is or where so I thought I would do some research.

Re: Elevator Disconnects #153773 11/27/03 12:18 PM
Joined: May 2002
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Roger Offline
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You're welcome Nick. I had a pretty hectic day yesterday and didn't get to research it as I had planned.

Roger

Re: Elevator Disconnects #153774 12/06/03 10:39 AM
Joined: May 2002
Posts: 1,716
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Roger Offline
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Nick, sorry I was so slow in coming back to this topic.

The unit below would indicate the shunt trip can be located in the machine room.


COOPER BUSSMANN
PACKAGE SOLUTIONS SIMPLIFY ELECTRICAL CODES AND STANDARDS FOR ELEVATOR SHUNT TRIP DISCONNECT
The BUSSMANN® POWER MODULE™ [Linked Image from profitpower.com] package solution takes the confusion and headache out of designing and building shunt trip disconnect capabilities into an elevator power system. Special requirements surround the elevator disconnect because it interfaces with fire alarm systems for shut down. In one easy-to-install pack-age from Bussmann, you get a solution for all required codes and standards: ANSI/ASME A17.1 calls for shunt trip operation of the elevator disconnecting means so power is turned off before water from the elevator shaft sprinkler system is applied. NEC® 620-62 limits the selection to devices that are proven to selectively coordinate between the over current protective device in the elevator disconnect and ALL upstream devices.

NFPA 72 requires the fire safety signal interface with a single point electrical and mechanical tie-in. [Linked Image from profitpower.com]



POWER MODULE Switch
30 – 400A,600Vac 3Ø
UL 98 Listed for 200,000A RMS short-circuit current rating
Shunt trip 120V

POWER MODULE Panel
400 – 800A bus MLO and/or main switch
UL 67 Listed for 200,000A RMS short-circuit current rating
Feeder switches 30 – 400A,600Vac accept Bussmann LPJ (amp) SP fuses

NEC® 110.9 requires high short-circuit current. The POWER MODULE meets all of these electrical codes and standards, plus reduces installation time and space requirements.

The POWER MODULE includes all the parts needed to interface with a fire alarm system in a UL Listed assembly:
Disconnect
Enclosure
Control transformer
Control circuit fuseblock
Control fuses
Fire alarm isolation relay
Terminal block
For more information on the BUSSMANN ® POWER MODULE™ package solution, visit Cooper Bussmann online at www.bussmann.com.

Roger


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