Code 3191 and Code 3190 “Electric Lighting Fixture, Lantern or Lamp Mfg. – Assembly & Finishing” are basically companion classification codes and are only to be assigned to the same employer if an employer is performing both operations.

Code 3190 cannot be assigned if the employer is engaged in fabricating only the parts for electric lighting fixtures, lanterns or lamps and does not assemble these parts into completed electrical fixtures, lanterns or lamps. 
      

Code 3191 applies to employers engaged in manufacturing electric lighting fixtures, lamps or lantern parts that are used in Code 3190 “Electric Lighting Fixture, Lantern or Lamp Mfg. – Assembly & Finishing” operations.  Manufacturing operations include stamping, forming, shaping, casting, spinning, machining, etc. of the raw materials used which may include metal, plastic, wood, glass, marble, plaster or other materials.