Norwester,

Welcome to our little corner of the Internet. [Linked Image]

There are some abbreviations and slang terms listed in the following thread that might help decipher some of the odd terminology here. Don't be bashful about asking, if you don't know what something is I'm sure you're not alone.
https://www.electrical-contractor.net/ubb/Forum1/HTML/001308.html

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Bill

Bill