100% agree Dave.
There is not a single set of Christmas lights that has that 3rd grounding wire so what is the point. We use plenty of 2 wire indoor cords for wreaths, garland, and to drop down from a tree to the ground. I will switch over to a 3 wire cord for the large loads.
Maybe when you visit it him on his job you can point out that homes should have dedicated outlets for the exterior and not tied into the dinning room light fixtures or the refrigerator, or half of the first floor. or all of the above.
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