Standards

American National Standards Institute https://www.ansi.org

National Institute of Standards and Technology https://www.nist.gov

IEEE Standards University https://www.standardsuniversity.org

IEEE Standards Association http://standards.ieee.org

A number of IEEE standards are available for download at no cost http://ieeexplore.ieee.org/browse/standards/get-program/page

The Internet Engineering Task Force (IETF) http://www.ietf.org

NFPA 70: National Electrical Code http://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=70

International Code Council (ICC) https://www.iccsafe.org