Suppliers have free e-books about the National Electrical Code which include analysis of changes and product applications:
- Thomas and Betts Analysis of NEC 2008 Code Changes
- Pass and Seymour Overview of NEC 2008 Code Changes
- Legrand 2011 NEC Code Changes
- Cooper Crouse-Hinds Codes and Standards for Hazardous Locations
- Eaton Cutler-Hammer Machinery OEM Control Panelbuilder's Handbook
- Handbook of recommended CADDY® Fasteners for easy compliance to NEC and CEC
- NEC guidelines for Cable and Gland Connectors by Hawke International
- Leviton Code Connection's NEC Pocket Guides
- NEC Code Basics by EC&M
- Stanpro Electrical Code Extract
- Thomas and Betts Analysis of NEC Code Changes 2011
