Conduit use in residential construction

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mvmarini

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I am trying to learn more about the use of thin walled conduit in residential construction. I know conduit is used in pretty much all commercial construction applications, nationwide. Living around Chicago, I also know that conduit is used in residential construction around here. I am trying to find out if there are any other markets around the United States where conduit, like EMT, is used in residential constructions applications (as opposed to Romex or flexible BX cable).

I have heard bits and pieces about some conduit being used in Dade County (Florida), around Denver, and in parts of Minnesota. Can anyone confirm this? Any other areas?

Thanks.
 
In New Mexico, we have to use conduit when the multifamily building is more than 3 stories high. We also have to use a listed raceway, usually EMT, for evaporative coolers in dwellings. Other than that NM is fine in dwellings here.

Jim T
 
jtester said:
In New Mexico, we have to use conduit when the multifamily building is more than 3 stories high. We also have to use a listed raceway, usually EMT, for evaporative coolers in dwellings. Other than that NM is fine in dwellings here.

Jim T
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Some of the AHJ's here in southern California have the same narrow mind set as in New Mexico. Allthough the EMT for evap coolers is a new one to me.
 
In the Minneapolis / St. Paul Metro area, the inner cities had an "all metal" code that was relaxed in the mid '70s to the NEC as written.

The history of the "all metal" requirement results in some interesting differences.

I can work in a 1938 stucco bungalow single family and find everything installed in heavy wall metal flex and black RMC. Going across the street into the neighboring municipality and working in the same style of stucco bungalow, also built in 1938, I'll find tar, cloth and paper sheathed ungrounded NM with rag and rubber tinned conductors.
 
In Denver and surrounding area it is NM cable. although I have found that houses built back in the 1920 and 1930s have black GRC and some houses built in 1950s have EMT. Current code is NM Cable. I grew up in suburbs of Chicago. (Glenview) and house was built in 1958 wired with type EMT. I know Chicago has a very tough code. But I belive it is do to political from the local Unions.
 
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