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#213105 03/21/14 09:12 PM
Joined: Mar 2003
Posts: 849
Y
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Question
Large Equipment by definition of the NEC.
Two Exit ways required UNLESS meets Exceptions (a) & (b).
Calls for Doorways. 24 inches wide ,6ft 1/2 High.
One end door / other end Ladder industrial fixed.
Ladder up or down three steps or more.
I have my option I'd like yours.
Yoopersup

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Joined: May 2005
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I wouldn't like to have to scurry down a ladder if there was a problem...especially if I was injured. If there were a door that led to the safety of a landing or platform before I had to climb the ladder I might feel better about it.


Ghost307
Joined: Apr 2002
Posts: 7,383
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IF the egress to the 'door' is unobstructed, or the 'door' is located per 'b', you will be OK. The ladder is not in the picture.

Panic hardware on the door!



John
Joined: Apr 2002
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Ghost.
He has a door on one end.

Without any dimensions, and a floor layout, I see noissue with the one door as the prime egress.

I would request panic hardware and an exit/em unit over the door.

Note 'request'. That would be at plan review. The designprofessionals usually have that on a plan, or they honor the 'request'


John
Joined: Mar 2003
Posts: 849
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Member
The Question comes down to:
the one door is per Code & layout calls for two doors.
There:s a Door per Code at one end.
A Ladder as described at the other end.
Does the Ladder as stated comply with code requirement.
Exceptions here are not in play!
Yoopersup

Joined: Jul 2004
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When I think about "large equipment" I think >600v and that kicks you over to part III.
It still lets a permanent ladder be "access"

110.33(B)
Quote
Access. Permanent ladders or stairways shall be provided
to give safe access to the working space around electrical
equipment installed on platforms, balconies, or mezzanine
floors or in attic or roof rooms or spaces.


Greg Fretwell
Joined: Mar 2003
Posts: 849
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Greg
110.33(B) is in part 3 is in the over 600 volt section.
This room has several 1200 amp large 480 volt Mcc;s as well as panels.
110.27 (A) 3 in the 600 v & under section has something similar BUT I don't think it's an Exception to the Door at each end section. If it was then you could have a Ladder at each end and defeat the Purpose & reason for a door with push to release hardware to exit the room if burned or injured.



Joined: Jul 2004
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I understand that is over 600v but I would expect that to be more strict.
I think you are going to have a hard time finding language that prevents a permanent ladder being part of the egress route from a switch room.


Greg Fretwell
Joined: Mar 2003
Posts: 849
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I'm just looking for language that allows it!
seems in 110.26 (C) there's only exceptions???
Says SHALL at each end.
This is Room & rooms with 480 volt equipment Multiple
1200 & 1600 amp Mcc's .

Joined: Apr 2002
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Yoop:
If I follow you, the one door is code compliant for this job.

You have a layout showing two (2) doors, and the second egress is via a fixed ladder.

As the one door seems to satisfy code, the second door is a moot issue.

Now, as I said above....the physical layout and dimensions of the room and the gear IMHO is required to provide a definite answer that one door is compliant.

IMHO, IF the second egress is required based on the layout, then the fixed ladder will be questionable.

The purpose and intent of the egress paths and the panic style hardware is to get out of harms way if someone is injured, and the ladder could be an insurmountable obstacle in the egress path.



John
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