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Hi, I'm Mike G and I'll be glad to assist you. How old is the condo? How many floors is the building?
As memory serves me all occupancies over 3 floors couldn't be wired with Romex. If all the branch circuits are Romex, it was built that way by exception. If only some are, I think it was a remodeling job done without a permit. To verify exactly you would need to check with the local building department. Code varie by jurisdiction.
The code prohibited it in building over 3 stories. It is still accepted in the state otherwise. How did you get the reason for this question? You might want to check with the condo service people to see if your unit is different than the others.
The current code allows Romex in any building if covered by a 15 minuet frire barrier. Drywall is a 15 min barrier. My memory brought back that at one time the limit was 3 stories. In any case the building department of your local government would be the best source as to if you are compliant or not. I would check and not religh on the word of a GC trying to sell a job.