The inspector has decided that the panelboard installation is a "floor-standing panelboard". His reasoning for this is by adding the panel skirt, it extends the panel to the floor. I have shown him the definition of floor standing panelboard but he doesnt interpret this installation as I do. Even though the panel is bolted to the wall along with skirt, and by no means does the floor act as a support in any way, he remains steadfast on his interpretation so far. These panels have already been terminated and there are about 15 completed. By identifing this installation as such, Article 408.5 of the 2005 NEC directly applies to us. Unfortunatly, the foremen in the other buildings failed to trim down their branch circuit stubs and a majority are 4"-6" above the pad. Im trying to get as much information, even though its starting to appear we might be trimming these conduits, so that right or wrong I am well prepared.
It all comes down to saving some possible lost hours.
1. Is our panel considered a "similar enclosure" as read in the 1st sentence of this article?
I can interpret that sentence to be directed at switchgear and any other piece of equipment that is free standing. I can understand in that application the difficulties that can arise from conduits being to high. I.E. interfering with the switchboards frame, coming in close proximity of bussing, etc.
The bottom of our panels are at minimum 4 feet above finished floor.
Whats your take?
408.5 Clearance for Conductor Entering Bus Enclosures
Where conduits or other raceways enter a switchboard, floor-standing panelboard, or
similar enclosure at the bottom, sufficient space shall be provided to permit installation of
conductors in the enclosure. The wiring space shall not be less than shown in Table 408.5
where the conduit or raceways enter or leave the enclosure below the busbars, their
supports, or other obstructions. The conduit or raceways, including their end fittings,
shall not rise more than 75 mm (3 in.) above the bottom of the enclosure.
