Elevators

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tedge

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Camden, ME
To go along w/ my NM in 5-story building post:

Same building will have an elevator. Never wired one before. Seems pretty basic; bring feeder to elevator room, let elevator people handle it from there. There must be more to it.

For instance: specs call for a shunt trip breaker (that's the extent of the spec). I assume that is for the motor feeder? What does the shunt connect to?

What I was thinking was to mount a sub-panel in the elevator room for all elevator related circuits: motor, car lights + recepts., and pit lights + recepts. Make any sense at all? What wisdom can any of you impart to me that will help me out?
 
So when the fire alarm goes off, the shunt trips the breaker and the people in the elevator are stuck wherever they are? Spam in a can.
 
tedge said:
To go along w/ my NM in 5-story building post:

Same building will have an elevator. Never wired one before. Seems pretty basic; bring feeder to elevator room, let elevator people handle it from there. There must be more to it.

For instance: specs call for a shunt trip breaker (that's the extent of the spec). I assume that is for the motor feeder? What does the shunt connect to?

What I was thinking was to mount a sub-panel in the elevator room for .all elevator related circuits: motor, car lights + recepts., and pit lights + recepts. Make any sense at all? What wisdom can any of you impart to me that will help me out?
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Just let the engineers design and you install is my wisdom.
The motor will be the controler hydraulic pump. The car lights will be wired to the controller because they must use elevator cable to connect to the elevator itself Sorry boys no romex allowed in here. :roll:. You will need an service recept and pit light in the pit and probably fire alarm like a smoke hatch motorized and a smoke and or heat detector at the top of the shaft. Smokes in each lobby for alternate floor relay and the actual alternate floor relay. Try not to let the operator crush you with the cab either above or below the cab. When the car lands on a desired floor in an actual alarm the shunt trip should activate to disable the cab with the doors open. Dont try to wire the shaft in romex either just a hint.
 
Just let the engineers design and you install is my wisdom.
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That's just it, I don't have any specific design plan. All I have is motor specs and "furnish shunt trip breaker"


I think we all understand your opinion on NM. Let it go.
 
tedge said:
That's just it, I don't have any specific design plan. All I have is motor specs and "furnish shunt trip breaker"


I think we all understand your opinion on NM. Let it go.
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I am not the one squirming about wiring an elevator. The price you pay for info is nm jokes. I have probably wired 50 or more elevators and some the entire package. Couple of funny nm jokes is a small price to pay. Pm me and I can explain more over the phone.
 
tedge said:
What I was thinking was to mount a sub-panel in the elevator room for all elevator related circuits: motor, car lights + recepts., and pit lights + recepts. Make any sense at all? What wisdom can any of you impart to me that will help me out?
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Check Article 620.

As far as wisdom, I would check with the elevator installers about the requirements - not all of them are in the NEC. For instance, there are certain foot-candle lighting requirements for the machine room, pit, and areas outside the elevator (where you exit the cab on each floor)
 
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For Industrial & Commercial ANSI 17.1 is the standard, which was incorporated into the NEC (620) in 2002, calling out for Shunt Trip & Selctively Coordinating the Feeder Circuit. The shunt trip gets it's signal from the Elevator Controller.
Usually recalling the Elevator to a ground floor, before sending the trip signal.
This requitement is for 2 or more people movers, including escallators.
ANSI 17.1 only goes as far as the load side of the disconnect and stops there. Several States (Michigan) do not follow this rule. Reason is to allow Fireman into high Rise buildings to fight the fire.
The NEC takes over from there, which also calls out for the monitoring of the Fire Alarm signal and the Fire Alarm Voltage.
What I have seen is a "Turf-War" in the Inspection process. How can Electrical Inspectors inspect this when the Elevator Inspectors lock the door?
 
I agree with the turf war so to speak. My inspections are to controller disconnects, car lighting disconnects and receptacle outlet disconnects. When I do pits, make sure that all your wiring methods within 48" of the pit floor are WP when you have a sprinkler in the pit (read article 620 in depth as well for GFCI requirements). ASME 17.1 section 2.8.3.3.4....Also, regarding car lighting OCPD, check the traveller cable for AWG it is probably 14 ga so fuse out at 15 amp max. Just a few tips. ASME 17.1 lighting in machine rooms controls room are required to produce 19 fc 2.7.9.1 and pits 10 fc 2.2.5.1. In summary check with the local elevator Inspector they usually want more. They due tend to make their own rules up.
 
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