Below is a list of 1/4 HP Motor manufacturers from St. Louis, Missouri. ¼ horsepower (HP) motors are fractional horsepower motors because they output power that is less than one HP, or 746 watts when referring to electric motors. Typically electric motors, although they can also be fuel-powered, ¼ hp motors are regulated and have standards as established by the government such as with the National Electrical Code (NEC 70) or the Occupational Safety and Health Administration (OSHA), as well as non-government associations such as the National Electrical Manufacturers Association (NEMA).