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1The short version
Nobody has ever been hurt by a string of lights. Plenty of people have been hurt by the ladder they climbed to hang the string of lights, which tells you exactly where to put your attention. Strings of electric lights became popular in the early 20th century and, by the mid-20th century, spread from the tree to houses and streets generally. The one electrical rule federal safety guidance is specific about for incandescent strings: never connect more than three sets end to end, and never overload an outlet.












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