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  1. aeffects

    NEC Issue

    Hello all. I have an issue with article 430, I read and read... and read and read, but I cannot find the answer to my question. I think the NEC is very clear when it comes to branch circuit conductor rating and protection against SC and GF rating, even feeder protection rating its quite clear...
  2. aeffects

    NEC interpretation issue

    I want to know if my interpretation of 110.14(C) is correct. Can I use the 75°C column ampacities for all gauges? (given the fact that I use 75°C or 90°C insulation and my terminals allow for 75°C wires) I'm 99% certain that I can, but I want to make sure. I've seen a lot of devices that allow...
  3. aeffects

    Transformer impedance

    Hi all, this is my first post ever. I have recently graduated, so in a way, I’m still studying. I'm trying to find some kind of transformer impedance "range" for different types of transformers, to use in short-circuit calculations. It's my understanding that, you never get to know the...

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