The below are excerpts from a research paper of about 30 years ago. Has there been much change over the years?
What type of electrical construction gets the least inspection?
1. Medium Voltage Distribution (By EC)
2. Heavy Industrial.
3. Medium Industrial.
4. Light industrial.
5. Large Commercial.
6. High Rise Office.
7. Major Shopping Centers.
8. Medium Commercial.
What gets the most detailed inspections?
Dwelling Occupancies.
I have inquired of several ahj’s over time and, collectively, they informed me that the EC’s, foremen, and journeymen on these larger projects knew more about code and safe installation than they did. They also rely on the engineer to prepare proper plans and specs. There were a number who even said that they primarily inspect dwellings as the other types of construction are few and far between and it was not economically feasible for the counties and municipalities to train inspectors in these as the code changes every three years. I was also enlightened that many times the dwelling plans don’t have circuitry, outlet, switch, or fixture locations and it is left to the EC to design and install the system.
Rowdy