I know that we have a consensus based code, but there are parts of the code that have "scientific" research behind them. Take the following examples:
1. Who is responsible for the ampacity tables in 310.16?
2. Who decided that cooking equipment could be derated on a commercial kitchen?
3. Why are the EGC's in 250.122 sized way they are?
There has to be scientific study behind these sections, and others in the code. Taping the white conductor with black tape for the hot conductor in a romex is a good example of how the "consensus" part of the code works. I'm not saying that the examples that I mention above are not consensus based, but I do think that there is a difference between those, and 6" of free conductor, or having a green grounding conductor. Somewhere....someone....had to do the "leg work", the lab work, the testing, the this, the that, the whatever to come up with a good reason for all this stuff. I said all that to say this....besides the ROP's and the ROC's is there a source(s) of information out there to help me with some of the "why's" behind the code?
Why is there air?
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