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The first electrical codes in the United States originated in [[New York (state)|New York]] in 1881 to regulate installations of electric lighting. Since 1897 the US [[National Fire Protection Association]], a private non-profit association formed by insurance companies, has published the ''[[National Electrical Code (US)|National Electrical Code]]'' (NEC). States, counties or cities often include the NEC in their local building codes by reference along with local differences. The NEC is modified every three years. It is a consensus code considering suggestions from interested parties. The proposals are studied by committees of [[engineers]], [[tradesmen]], manufacturer representatives, fire fighters, and other invitees.
Since 1927, the [[Canadian Standards Association]] (CSA) has produced the Canadian ''Safety Standard for Electrical Installations'', which is the basis for provincial electrical codes. The CSA also produces the [[Canadian Electrical Code]], the 2006 edition of which references [[IEC 60364]] (''Electrical Installations for Buildings'') and states that the code addresses the fundamental principles of electrical protection in Section 131. The Canadian code reprints Chapter 13 of IEC 60364, but there are no numerical criteria listed in that chapter to assess the adequacy of any electrical installation. The latest version of [[Canadian Electrical Code|Canadian Electrical Code (CEC)]] is version 2024. The main updates include requirements for Renewable and Energy Storage Systems, Electric Vehicles (EVs), Wiring Methods, Health Care Facilities, etc.<ref>{{Cite web |last=Ledes |first=tube |date=March 24, 2025 |title=Canadian Electrical Code (CEC): The Ultimate Guide |url=https://www.ledestube.com/canadian-electrical-code-cec-the-ultimate-guide/ |url-status=live |website=Ledes}}</ref>
Although the US and Canadian national standards deal with the same physical phenomena and broadly similar objectives, they differ occasionally in technical detail. As part of the [[North American Free Trade Agreement]] (NAFTA) program, US and Canadian standards are slowly converging toward each other, in a process known as harmonisation.
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