This UFC 3-520-01 provides design guidance for interior electrical systems. The document has been extensively revised to update the criteria for interior electrical systems. This UFC has also been coordinated with new UFC 3-501-01, Electrical Engineering. UFC 3-501-01 provides overall electrical engineering criteria, including electrical design analysis and documentation criteria. This type of material has been removed from UFC 3-520-01 so that duplication of criteria is eliminated. Why buy a book you can download for free? First you gotta find it and make sure it's the latest version (not always easy). Then you gotta print it using a network printer you share with 100 other people - and its outta paper - and the toner is low (take out the toner cartridge, shake it, then put it back). If it's just 10 pages, no problem, but if it's a 250-page book, you will need to punch 3 holes in all those pages and put it in a 3-ring binder. Takes at least an hour. An engineer that's paid $75 an hour has to do this himself (who has assistant's anymore?). If you are paid more than $10 an hour and use an ink jet printer, buying this book will save you money. It's much more cost-effective to just order the latest version from Amazon.com This book is published by 4th Watch Books and includes copyright material. We publish compact, tightly-bound, full-size books (8 1/2 by 11 inches), with glossy covers. 4th Watch Books is a Service Disabled Veteran-Owned Small Business (SDVOSB). For more titles published by 4th Watch Books, please visit: cybah.webplus.net UFC 2-100-01 Installation Master Planning UFC 4-010-06 Cybersecurity of Facility-Related Control Systems UFC 4-021-02 Electronic Security Systems by Department of Defense FC 4-141-05N Navy and Marine Corps Industrial Control Systems Monitoring Stations UFC 4-010-01 DoD Minimum Antiterrorism Standards for Buildings UFC 4-020-01 DoD Security Engineering Facilities Planning Manual UFC 3-501-01 Electrical Engineering UFC 3-550-07 Operation and Maintenance (O&M) Exterior Power Distribution Systems UFC 3-550-01 Exterior Electrical Power Distribution UFC 3-560-01 Electrical Safety, O & M UFC 3-201-02 Landscape Architecture UFC 3-540-08 Utility-Scale Renewable Energy Systems UFC 3-440-01 Facility-Scale Renewable Energy Systems