The switch board room drawing shall carry a little block showing name of project, name and address of developer and architect and endorsed by registered Consultant / Contractor responsible for planning, design and supervision of the installation work.
Minimum clearance requirements for purpose of safety and effectively operating and adjusting all equipment mounted on the main switch board (MSB) are as follows :-
The switch board room shall preferably be provided with an alternative emergency exit door.
The door shall be arranged to be opened outwards and shall not obstruct a passageway into which open. All doors shall be fitted with locks to prevent the entry of unauthorized persons, but shall be readily opened from the inside without the use of a key. Sliding door is acceptable.
The switch board room shall either be naturally or forced ventilated depending on location. Forced ventilation shall be required if the switch board room is located at basement levels where ducted fresh air and exhaust are to be maintained effectively. The exhaust fan shall be of adequate capacity and shall be controlled by a timer.
Trenches, cable trays and cable entry duct/pipes where required for services to and from the switch board room are to be provided
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