(l) Amanually operated mains disconnecting switch shall be installed in the main circuit cables of electric Lift machines or motor generator sets. This switch shall be placed close to and visible from the machine or motor generator set controls.
(2) When there aremore than oneLift machine in machine room, each machine shallhave a separate disconnecting switch. These switches shall be numbered to correspond to the number of the driving machine which they control and they shall be conveniently situated with respect to the driving machine.
(3) When any type of contact is used on the controller switches, for disconnecting the main circuit, at least two independent current breaks shall be incorporated in the design. In the event of an earth fault with any door open, the Lift shall not work.
(4) Operation ofa spring or springs in tension or the completion ofanother electric circuit shall not depend on to break the circuit to stop the Lift at terminal landings.
(5) The interruption of the electrical circuit shall stop and prevent the movement of the car.
(6) Each Lift machine operated by a poly-phaseA. C. motor shall be protected against phase reversal or failure.
This protection shall be extended to A. C. motor.
(7) All control circuits shall be independently protected by fuses or miniature circuit breaker.
(8) The voltage ofany controller operating circuit shall not exceed 250 volts. The control circuit shall be suitably protected independent ofthe main circuit and it shall be so arranged that an earth fault or open circuit shall not create an unsafe condition.
(9) It shall not be possible to start the Lift car under normal operation unless every landing door and car door is in the closed position.
(10) Following requirements shall be complied with when the Lift is put in "inspection mode":
() It shall not be possible to control the car from any other position;
(ii) The car will travel only at a speed of 25% of the rated speed subject to a maximum of 1.0 meter per second.
(iii) The car shall not move until all safety devices are in position.
(11) Every Lift having winding drum machine shall be provided with a switch or device of adequate capacity which shall automatically cut ofelectric supply and shall stop the machine in the event the Lifting ropes ofthe Lift car become slack either due to any obstruction ofthe Lift car in its travel in the descending direction or due to any other cause whatsoever;
(12) Emergency stop switches for short circuiting the landing door lock circuit shall be prohibited.
( 13) An emergency stop switch, ofmanually opened and closed type, shall be provided on the top ofevery Lift car and in the Lift pit and shall be marked conspicuously.
(14) All Lift traveling at a speed of 1 meter per second and above shall be provided with floor leveling device.
26 THEKOLKATAGAZETIE, EXTRAORDINARY, NOVEMBER 11, 2022 [PARrI
(15) Signal bells or similar apparatus, which can be operated from any floor in connection with an indicator in the Lift car shall be provided on all Lift operated by Lift operators.
(16) The operation ofthe fire Lift in building having more than 3 0 meters height, shall be a simple toggle or two button switch situated in a glass box painted with red color adjacent to the Lift at entrance level on the ground floor. When the switch is ON, the landing call points shall become inoperative and car shall report to the ground floor and the same shall remain on car control only. When the switch is "OFF", the Lift shall return to normal working.
(17) Floor position indicator shall be provided in the Lift car as well as at every landing.
(18) Car top shall be provided with a suitable wire mesh guard to provide safety to persons working thereon for maintenance ofLift.