That 1930s fan you found in your parents' attic. The industrial light you snapped up for $10 at a yard sale. The vintage chrome coffeemaker from eBay. Old-
fashioned plug-ins look great and may still run, but they were made according to antiquated safety codes and may include frayed or damaged wires. Have them rewired, and, in general, stick with modern equipment that comes with a UL mark, signifying that Underwriters Laboratories has vouched for the item's safety in actual use.