Improperly wired cord cap
Richard Graves, owner of Graves Electric in Corpus Christi, Texas, has been a licensed master electrician and contractor since 1986. He was called out to look into a problem with a heat lamp circuit that was a part of a commercial food-warming table in a pizza parlor. The customer said that every time the heat lamp cord was plugged into the wall receptacle, fire would "shoot out of the receptacle"