- 1999 National Electrical Code - A source for print and electronic versions of the 1999 NEC and NEC Handbook. Requires purchase.
- Cabling FAQ. - Guide to handling and installing many types of electrical cables.
- Contractor Cafe - National Electrical Code training for electrical contractors.
- Mike Holt Enterprises - National Electrical Code explanations, training and tips.
- National Electrical Code Update Course - An online course that allows an electrician, to study changes to the NEC from the comfort of your home or office. Accepted by various states. From the University of Eastern Maine Community college.
- NEC Electrical Code License Exam Renewal Update - NEC Electrical Code License Exam Renewal Update
Media publications
- Clearances and working space - A magazine article dealing with the NEC's requirements on clearances and work spaces for protection of persons. (Published 2001.08.01)