Please take a look and see these EC&M video clips:
http://www.youtube.com/user/ecmwebtvAlso see the others here as well:
www.joetedesco.orgJoe
Gee Joe, you didn't mention the depth problem
In the "Dupont takes electricity seriously" video overlooked is the fact that all of Edison's systems and equipment were DC it took Westinghouse and his transformer to create the distribution and transmission systems that we have today.
Greg: Thanks, I mentioned 110.26 where that depth requirement is covered. I will try to be more specific now that I will be developing more for:
http://ecmweb.com/nec/moving_violations/