If possible give me specifics, date month anything. If there is a document or website you know of that would help as well. Thanks in advance.
The electrical code is national Ohio may require more the NEC(national electrical code) but not less. Even if they did try to make there code less any electrician would be liable for damage cause if he intentionally and knowing installed less than the NEC Do you mean for 220v appliances like dryers and stoves? off the top of my head 1996 I started in the trade in 95 and i remember it being talked about alot and i have never installed a 3wire A new code is put out every three years Wiki says 1999 here is a link