Defines basic accessories of transformers/reactors, such as: - Thermometer pockets, to be used for liquid immersed transformers, - Earth terminals, to be used for liquid immersed and dry-type transformers, - Draining plugs, to be used for liquid immersed distribution transformers, - Filling openings, to be used for liquid immersed distribution transformers, - Rollers, choice and distance to be used for liquid immersed and dry-type transformers.