The 2007 NESC Handbook, Sixth Edition, 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 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 2002 version and what this means for users. The 2007 Code includes changes in a great many areas, including: - Rounding numbers found in the rules - Metal grounding poles - Starting voltages and clearances - Grounding and insulation for guys - Clearances between transmission lines - Multiplex cable attachment to neutral brackets - Loading due to freezing rain and wind - Fiber-reinforced polymer elements - Worker loads - Equipment bonding - Arc exposure analysis - Antenna radiation exposure limits The 2007 edition also contains new appendices on loading and conductor movement, extreme wind loading, and maximum over-voltage at a work site.