(1) Where starting pushes or switches are within reach of the public, they shall be the key operated type.
(2) (i) An emergency "Stop" push or switch conspicuously marked "STOP PUSH" or "STOP SWITCH" and accessible to the public shall be fixed at the top and bottom landings ofeach Escalator;
(ii) The operation ofa stop push or switch shall open a circuit and cause the power supply to the Escalator q' to be disconnected. It shall not be possible to start the Escalator by means of such pushes or switches.
(iii) Any Escalator operating the ascending direction shall be equipped with means to cause the power supply to the Escalator to be disconnected and the auxiliary brake applied in the event of accidental reversal ofdirection travel.
(3) A speed governor shall be provided, the operation of which shall cause the interruption of power to the driving machine should the speed ofthe steps exceed a pre-determined value which shall be not more than 40 percent above the rated speed :
Provided that the over speed governor is not required where a low slip alternating current squirrel cage induction motor is used and the motor is directly connected to the driving machine.
(4) A broken step chain device shall be provided which shall cause the interruption of power to the driving machine if a step chain breaks and where automatic chain tension device is not provided, it shall cause the interruption if excessive sag occurs in either of the step chain;
(5) Where the driving Machine is connected to the main drive shaft by a chain, a broken drive chain device shall be provided to cause the application ofthe brake on the main drive shaft of the drive chain pans;
(6) (i) A stop switch shall be provided around machinery areawhere means ofaccess to the space is provided.
This switch, when opened, shall cause electric power to be cut off from the Escalator driving machine motor and brake.
(ii) The stop switches shall be of the manually opened and closed type; conspicuously and permanently marked STOP and, positively opened mechanically and their opening shall not be solely dependent on springs;
(iii) Escalator driven by poly-phase motor shall be protected against phase reversal or phase failure.
(7) An electrically released brake shall automatically stop the Escalator when any ofthe safety devices required under sub-Rules (2), (3), (4) and (5) of this Rule come into operation.