Section 132(4) in Kolkata Municipal Corporation Building Rules, 2009
(4)Every building with a load demand of 50 KW or more or a building with total floor area of more than 5,000 sq. m should provide an open space for commissioning a transformer. The land must be kept free for the utility and no construction work will be allowed to be carried on the space. The space should be well accessed by 3 m wide roads for normal truck or lorry movement for loading and unloading of transformer and accessories for erection and maintenance.
