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An electrical room is a room or space in a building dedicated to electrical equipment. The size of the electrical room 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.〔Albert Thumann, Harry Franz, ''Efficient Electrical System Design Handbook'',Fiarmont Press 2009 ISBN 0-88173-593-0 pages 76-77〕 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. ==Construction features== The construction features of an electrical room vary depending on the scope of the equipment to be installed. Floors may be reinforced to support heavy transformers and switchgear. Walls and ceilings may have to support a heavy cable tray system or busbars. Additional ventilation or air conditioning may be needed, since electrical apparatus gives off heat but the temperature must not rise beyond the tolerance of equipment. Double doors may be installed to allow for maintenance of large equipment.〔 If utility service entrance equipment and metering is present in the room, special provisions may be made for access by utility personnel. Fire detection and suppression systems, such as carbon dioxide, may be installed. A large electrical room may have extensive provisions for grounding (earthing) and bonding enclosures of electrical equipment to prevent stray voltage and danger of electric shock, even during faults in the electrical system. Lightning protection requires different measures than protection from power-frequency faults. Electrical rooms may have electromagnetic shielding to prevent interference to nearby sensitive audio or video equipment. In large facilities. An access control system may control admission to the room. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Electrical room」の詳細全文を読む スポンサード リンク
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