110.26 (F) Dedicated Equipment Space headache! Please explain the logic!

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charlie b said:
I would not call it arbitrary. If you got no room, then you got no room. But if there is room, we get first dibs on it. It is as simple as that.
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As I understand it, the space is dedicated to the electrical installation. So any equipment or other material in the scope of work governed by the NEC can be installed in the dedicated space, whether related or not to that particular panelboard.

Even including low-voltage datcom equipment, and fiber optics.
 
GoldDigger said:
I guess I would have to build out a support board for the panel such that the drain pipe is behind it instead of directly under it. The conflict with running conduit down the wall will be unchanged but the letter of the Code will have been met.
Unlike the working space, the dedicated space does not extend either in front of or behind the equipment.
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Except this is a 4000 amp switchboard and all the conduits feed from underground. Moving it is as improbable as finding a different place to put the toilet on the floor above.
 
A structural floor/ceiling is exackly what it says -- holds the structural floor or ceiling up. Floor joist & rafters are part of the assembly -- now visualize this; two story house, main level 8' walls with the structural floor above the top plates, install a panel in the wall, any foreign item within the joist space ( plumbing, gas, ductwork,) which is most likely less than 2' above your panel is no problem. not below the structural floor/ceiling. a built soffit though is not supporting any loads upon it.
 
mwm1752 said:
A structural floor/ceiling is exackly what it says -- holds the structural floor or ceiling up. Floor joist & rafters are part of the assembly -- now visualize this; two story house, main level 8' walls with the structural floor above the top plates, install a panel in the wall, any foreign item within the joist space ( plumbing, gas, ductwork,) which is most likely less than 2' above your panel is no problem. not below the structural floor/ceiling. a built soffit though is not supporting any loads upon it.
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I agree that you have a good description of what I expect a structural ceiling is, but that isn't what the code refers to. Myself, I am just contrary to this rule so I am pointing out the vagueness. If they are going to use a term like structural ceiling, then it should have a corresponding definition and meaning in the building code or the NEC. And you just pointed out another example of the arbitrary nature of the rule with your joist example.
 
Strathead said:
I agree that you have a good description of what I expect a structural ceiling is, but that isn't what the code refers to.
I respectfully disagree with this comment - code accurately adversely describes the structural ceiling -
(E) Dedicated Equipment Space
(1) Indoor. Indoor installations shall comply with 110.26(E)
(1)(a) through (E)(1)(d).
(a) Dedicated Electrical Space. The space equal to the width and depth of the equipment and extending from the floor to a height of 1.8 m (6 ft) above the equipment or to the structural ceiling, ( accurately points out to the bottom of the structural ceiling)whichever is lower, shall be dedicated to the electrical installation. No piping, ducts, leak protection apparatus, or other equipment foreign to the electrical installation shall be located in this zone.
Exception: Suspended ceilings with removable panels shall be permitted within the 1.8-m (6-ft) zone.(defines an exception to a non structural type ceiling)
(d) Suspended Ceilings. A dropped, suspended, or similar ceiling that does not add strength to the building structure ( joist & rafters add strength to the structure as they hold up the floor of the next level which is also a ceiling of the level below so they are by code not eliminated as a structural ceiling and by adverse definition are a structural ceiling) shall not be considered a structural ceiling.

Myself, I am just contrary to this rule so I am pointing out the vagueness. If they are going to use a term like structural ceiling, then it should have a corresponding definition and meaning in the building code or the NEC. And you just pointed out another example of the arbitrary nature of the rule with your joist example.
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My example was intended as you have noted- but does not change the meaning of structural ceiling per the NEC IMHO
 
Strathead said:
The P trap has to go somewhere.
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Well the trap is usually internal to the toilet, but the drain does need to use gravitational flow which will involve running drain through the floor unless it is a wall mount toilet, so the drain is not going to run upward at least not until it hits a lift station.
 
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