Describes electric sewing machines and to electrical sets for mounting on sewing machines. Sewing machines not intended for normal household use, but which nevertheless may be a source of danger to the public. Does not apply to appliances designed for industrial or commercial purposes. Requirements for non-resistive controllers and those incorporating semiconductor devices are under consideration. Covers: Protection against electric shock, Radio and television interference suppression, Insulation resistance and electric strength, Overload protection, Stability and mechanical hazards, Mechanical strength, Construction, Internal wiring and Components.