SEU in Mid-rise Condo

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davecor77

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The spec's of a project to be bid allow for SE & SEU for service to the condos in a seven story building. Is this permitted by the NEC, or is MC cable required instead?
 
Condo feeders from meter stack to condo panels. (91 units) Does the code allow the use of SEU cable in a seven story building to feed the panels for the condos?
 
Sure, if it's type III, IV or V construction. I also think you'd be using SER since you'll need the EGC to be run with the feeders.
 
I looked at Annex E in the NEC and it only goes up to 5 stories. I'm curious what type of classification this condo is?

Don't forget you have to use the 60 degree column for determining ampacity for SE/SER in a inside application. 338.10(B)(4) and 334 Part II.

I take it this is concrete and steel construction? Can't imagine why a engineer would want to spec SE in this application. Everything is sharp and will cut this wire up.

Sounds like all your meter packs will be in your service room? Would have been easier to put them on each floor but that's a design engineering issue.
 
davecor77 said:
Condo feeders from meter stack to condo panels. (91 units) Does the code allow the use of SEU cable in a seven story building to feed the panels for the condos?
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Find out from the planning board/ inspection department what type of construction the building will be classified as. The NEC does not address how high you can go with NM or se cable but rather uses the type construction. Here is the art. on nm which would apply to SE also.

334.10 Uses Permitted.
Type NM, Type NMC, and Type NMS cables shall be permitted to be used in the following:
(1) One- and two-family dwellings.
(2) Multifamily dwellings permitted to be of Types III, IV, and V construction except as prohibited in 334.12.
(3) Other structures permitted to be of Types III, IV, and V construction except as prohibited in 334.12. Cables shall be concealed within walls, floors, or ceilings that provide a thermal barrier of material that has at least a 15-minute finish rating as identified in listings of fire-rated assemblies.
FPN No. 1: Types of building construction and occupancy classifications are defined in NFPA 220-2006, Standard on Types of Building Construction, or the applicable building code, or both.
FPN No. 2: See Annex E for determination of building types [NFPA 220, Table 3-1].
(4) Cable trays in structures permitted to be Types III, IV, or V where the cables are identified for the use.
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