elevator emergency power

[lielec11]

Like most 700, 701 and 702 have been a bit tricky for me to follow and I have few questions...

1) An elevator in a non high rise that is being utilized as a second means of egress goes on the 700 ATS or 701 ATS? My gut says 701 because it is ONLY required to be a means of egress based on the life safety code, but is that considered "essential for safety to human life"?

2) What code/code section allows the use of a single ATS? I remember seeing something that said 150kW or under you could use a single ATS? I could be wrong though.

3) Where does it specify 701/702 loads can share a single ATS? I remember a specific diagram but don't see it in the 2011 or 2014 handbook.

Thanks in advance.

 

[dkidd]

2) What code/code section allows the use of a single ATS? I remember seeing something that said 150kW or under you could use a single ATS? I could be wrong though.

517

 

[lielec11]

517

Got it thanks, so this is applicable only to health care facilities, now I remember.. been awhile since I've done any HC design.

 

[Ingenieur]

look at 517.32.G and 517.42.G and 517.43.B.2 and 620.X

 

[lielec11]

look at 517.32.G and 517.42.G and 517.43.B.2

That is referring to the life safety branch of health care facilities thought, what about a regular building? A student dorm to be exact...

 

[Ingenieur]

That is referring to the life safety branch of health care facilities thought, what about a regular building? A student dorm to be exact...

it is up to the local code ahj to determine if it is emergency or legally required

 

[dkidd]

That is referring to the life safety branch of health care facilities thought, what about a regular building? A student dorm to be exact...

How many floors? If it is a hydraulic elevator I usually only see lowering means, no emergency power.

 

[lielec11]

How many floors? If it is a hydraulic elevator I usually only see lowering means, no emergency power.

I am only reviewing a design-build submittal for someone. It is 6 stories and the design currently has two elevators on emergency power. I say "emergency" because there is only one ATS that also provides power to egress lighting.

I am unsure if I should direct them to install a separate ATS for the elevators.

 

[dkidd]

Article 700

700.2 Definitions.
Emergency Systems. Those systems legally required and
classed as emergency by municipal, state, federal, or other
codes, or by any governmental agency having jurisdiction.
These systems are intended to automatically supply illumination,
power, or both, to designated areas and equipment
in the event of failure of the normal supply or in the event
of accident to elements of a system intended to supply,
distribute, and control power and illumination essential for
safety to human life.
Informational Note: Emergency systems are generally installed
in places of assembly where artificial illumination is
required for safe exiting and for panic control in buildings
subject to occupancy by large numbers of persons, such as
hotels, theaters, sports arenas, health care facilities, and
similar institutions. Emergency systems may also provide
power for such functions as ventilation where essential to
maintain life, fire detection and alarm systems, elevators,
fire pumps, public safety communications systems, industrial
processes where current interruption would produce
serious life safety or health hazards, and similar functions.

 

[lielec11]

Article 700

700.2 Definitions.
Emergency Systems. Those systems legally required and
classed as emergency by municipal, state, federal, or other
codes, or by any governmental agency having jurisdiction.
These systems are intended to automatically supply illumination,
power, or both, to designated areas and equipment
in the event of failure of the normal supply or in the event
of accident to elements of a system intended to supply,
distribute, and control power and illumination essential for
safety to human life.
Informational Note: Emergency systems are generally installed
in places of assembly where artificial illumination is
required for safe exiting and for panic control in buildings
subject to occupancy by large numbers of persons, such as
hotels, theaters, sports arenas, health care facilities, and
similar institutions. Emergency systems may also provide
power for such functions as ventilation where essential to
maintain life, fire detection and alarm systems, elevators,
fire pumps, public safety communications systems, industrial
processes where current interruption would produce
serious life safety or health hazards, and similar functions.

Thanks for sharing the information note, typically those fly under the radar due to the smaller print. However, in my local jurisdiction the AHJ considers egress elevators under legally required which is why I posed the question. I was just looking for input from others.

Any ideas on my original question 3?

 

[dkidd]

700.5 Transfer Equipment.
(D) Use. Transfer equipment shall supply only emergency loads.

There is no similar prohibition in 701, so unlike emergency transfer equipment this
transfer equipment is not prohibited from supplying other loads.

 

[LIM]

Thanks for sharing the information note, typically those fly under the radar due to the smaller print. However, in my local jurisdiction the AHJ considers egress elevators under legally required which is why I posed the question. I was just looking for input from others.

Any ideas on my original question 3?

700.5(D) limits the use of transfer switches to emergency (700) loads.

This limitation is not listed under 701.5.

 

[lielec11]

Thanks to the both of you...

 

[ron]

The Building code will differentiate whether it is 700 or 701.

For example the IBC refers to 700 loads as emergency and 701 loads as standby. Section 2702.2.2. says that elevators need standby power when required by other sections such as 1009.4 (elevators used as an accessible means of egress)