It does seem impossible to search for, but just about any code published by the NFPA is readable online. You will have to register for a username and password.
The NFPA 70: National Electrical Code starts here:
NFPA 70: National Electrical CodeŽ
Near the bottom af the page there is a heading "Additional Information about this Document". Select one of the documents to VIEW and follow the prompts.
You can't copy, search or print the contents.
