Workers in this unit group fit, adjust and repair electrical machinery and other electrical apparatus in factory, workshop or place of use. Their functions include: fitting, adjusting and repairing various kinds of electrical machinery and other electrical apparatus; fitting adjusting and repairing electrical motors and generators, switchgear and control apparatus, electrical instruments, or electrical parts of elevators and related equipment; fitting, adjusting and repairing electrical apparatus in domestic appliances, office machines, industrial machines and other appliances, aircraft, ships and vehicles; performing related tasks. Workers assembling electrical and electronic equipment from finished parts not requiring further tooling are classifies in unit group 8-53. Electrical wiremen (including aircraft, ship, vehicle and building electricians) are classified in unit group 8-55.