The 2007 National Electrical Safety Code (NESC) Handbook, edited by Allen Clapp, is an essential companion to the Code. It gives users insight into what lies behind the NESC's rules and how to apply them. The "Handbook" was developed for use at many levels in the electric and communication industries, including those involved in system design, construction, maintenance, inspection, standards development and worker training.

The "Handbook" also discusses how the NESC Committee has interpreted the rules in the National Electric Safety Code and responded to change proposals during the past 85 years. This allows users to understand how questions they may have were dealt with in the past. The "Handbook" looks at how the 2007 Code, with its many additions and revisions, differs from the 2007 version and what this means for users. The 2007 Code includes changes in a great many areas, including: