Historical Standards

An old drawing depicting miners using historical standards relating to ISO and ANSI in the old west.

For a medley of reasons, people need historical standards.

To remain current, standards documents are subject to periodic review, and at the end of this cycle, standards are either reaffirmed, revised, or withdrawn. As such, many prominent standards see new editions every few years, with the revised version superseding the previous one. If you look throughout this blog, you will read hundreds of updates regarding the changes made during standard revisions.

However, sometimes people need other editions. Whether due to a need to comply with previous editions, the intention of comparing past and current editions of the same standard, or just a desire to have an outdated standard, there is a sizeable demand for historical standards.

NFPA 70 2017 NEC Code Current Edition Adoption Standard
NFPA 70 2011 Historical Standards NEC Code Old Adoption

For example, the current edition of the National Electrical Code (NEC) is NFPA 70-2017. This document facilitates the safe installation of electrical wiring and equipment, and it is used by professionals nationwide who need to assure this ability. Beyond its use as a voluntary consensus document, the 2017 NEC has been adopted statewide in 28 states.

However, as of February 1, 2019, 15 states have adopted the 2014 NEC, Nevada is using the 2011 NEC, and the 2008 National Electrical Code is in effect throughout Kansas, Illinois, and Indiana. In addition, numerous counties and municipalities have adopted past editions of the NEC into their regulations.

Therefore, there is a clear need for professionals to acquire not only the most recent edition of the National Electrical Code, but also its predecessors.

You can find historical standards on the ANSI Webstore simply by searching for them. Webstore visitors can also narrow down their search by checking “Historical” in the left-hand column of the search page. All standards are marked either “HISTORICAL” or “MOST RECENT”

If you have any questions regarding historical standards or are searching for a specific document, please feel free to reach out to us by messaging us on Facebook, tweeting at us, or emailing us at blog@ansi.org.

2 thoughts on “Historical Standards
  1. Hello

    Reading through a 1952 printing of Deming’s Lectures in Japan, and he references:
    ANSI Z1.1

    Cannot find this document in local library system, do you have any sources for this document?


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