How do you prove it was tested by UL to pass those safety standards? Having the number on the jacket prevents issues like we had around the time that I asked that question, (which must have been months ago, by the way). We install commercially, and we were using a wire that did not have the UL number on the jacket. We had to return to a location to remove all of that wiring and replace it with one that had the correct UL number listed on it. Unfortunately, we ran into a very tough local inspector there. Having the UL number on the jacket, or at least documentation that we can carry with us, would help when we run into those types of inspectors.

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• James W on Mar 18, 2019