I think some of these replys are overdoing it when they say plcs and the such having been in the commercial field for 25 years I have gotten along fine without that, this portion of the trade is more suited for industrial electricians.
Ditto on the above - 16 years and ran into a PLC twice I think. Once on a candy factory line, and once at a glass fabricator's - both on machinery they had inside people to handle. For the most part I consider "Commercial" (at least in my market) to be retail and showroom spaces, offices, returaunts and my personal favorite - Auto body and cabinet shops... As we have only 'light industrial' left here... I call it commercial too...
Oh know your limitations...
