Electrical, Electrical & Electronics, Specialty Boutique, General & Reference, Electricity Principles 

The official source for the NEC® 2011 is here, and it's packed with the most up-to-date, reliable information you need for safe, accurate, and efficient installations. Packaged in a handy, pocket-sized format, the NEC® 2011 Pocket Guide for Commercial & Industrial Electrical Installations is a must-have resource that offers guidelines and installation rules for commercial and industrial occupancies. Whether working in an office, a factory, or a warehouse, electrical installers will find that they can save time and improve their accuracy with the quick, concise reference material found in this book. Store it in a toolbox, a glove compartment, or even a pocket – and you'll always have the code requirements you need, whenever you need them. - from Amzon