"An electrical room is a room or space in a building dedicated to electrical equipment. Its size is usually proportional to the size of the building; large buildings may have a main electrical room and subsidiary electrical rooms. Electrical equipment may be for power distribution equipment, or for communications equipment.
Electrical rooms typically house the following equipment:
Electric switchboards
Distribution boards
Circuit breakers and disconnects
Electricity meter
Transformers
Busbars
Backup batteries in a Battery room
Fire alarm control panels
Distribution frames
In large building complexes, the primary electrical room may house an indoor electrical substation." - (en.wikipedia.org 19.12.2021)
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