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national electric code

  1. jar546

    Copper Clad Aluminum Wire is Making a Comeback

    In the early 1950s, copper shortages led cable manufacturers to develop an alternative conductor made from electrical-grade 1350 aluminum. By the 1960s, aluminum building wire had become popular across the United States. However, by 1968, it was identified as a hazard due to thermal instability...
    • jar546
    • Thread
    • cca copper clad aluminum electrical wiring national electric code nec
    • Replies: 15
    • Forum: Electrical Codes
  2. jar546

    NEC Adoption Map of USA

    There is even more info if you scroll down below: https://www.nfpa.org/NEC/NEC-adoption-and-use/NEC-adoption-maps
  3. jar546

    Changes in the 2014 NEC

    I know that some of you are already on the 2017 NEC but most of us are probably still anywhere from 2008 to 2014. For those that are on the 2005 or earlier, I wonder where you live and what universe the powers that be for your code decisions are in. Anyway, here are the changes from 2011 to...
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