6.1.6 Operating and Safety Devices
(a) Location and Design. The switch(es) shall be
(1) located so that the escalator steps are within sight.
(2) key operated, the continuous-pressure spring-return type, and shall be operated by a cylinder-type lock having not less than a five-pin or five-disk combination.
(3) clearly and permanently marked "DOWN," "RUN," and "UP," in that order, with the key removable only in the "RUN" (spring return) position. The switch(es) shall be rotated clockwise to go from the "DOWN" position to the "RUN" position to the "UP" position.
(c) The starting switch(es) shall be located within reach of an emergency stop button (see 184.108.40.206.1).
(d) The key shall be Group 2 Security (see Section 8.1).
(a) General Requirements
(1) Switches for transferring the control of the escalator to inspection operation shall be provided or a switch shall be provided at each landing in a portable control station; the switch(es) shall function as follows:
(-a) be through a contact that shall be positively opened mechanically and whose opening shall not depend solely on springs
(-b) be manually operated
(-c) be labeled "INSPECTION"
(-d) have two positions, labeled "INSPECTION" or "INSP" and "NORMAL" or "NORM"
(-e) when in the "INSPECTION" position, it shall cause the movement of the escalator to be solely under the control of constant-pressure operating devices at that landing or in that portable control station
(-f) be arranged so that if more than one inspection transfer switch is in the "INSPECTION" position, then all constant-pressure operating devices at all locations shall be inoperative
(-g) be protected against accidental contact
(2) Constant-pressure operating devices shall
(-b) be distinctly recognizable from indications on the device as to the direction of travel controlled
(-c) be protected against accidental contact
(-d) be located so that the escalator steps are within sight
(4) When portable control stations are used, the cord length shall not exceed 3000 mm (120 in.).
(b) Plug-in Portable Control Station. A plug-in portable control station shall be permitted, provided that
(2) when the switch, if provided, is in the "INSPECTION" position, or when the control station is plugged in, it shall cause the movement of the escalator to be solely under the control of constant-pressure operating devices contained in the portable unit
(3) the plug-in portable control station is stored at the upper landing machinery space
(a) Location. A red stop button shall be visibly located at the upper and lower landings on the right side facing the escalator. In jurisdictions not enforcing the NBCC, remote stop buttons are prohibited. In jurisdictions enforcing the NBCC, if remote buttons are provided, they shall be located such that the escalator is visible from the stop button location.
(1) On high deck balustrades, they shall be located on the curved newel deck in the upper quadrant, with the centerline of the button at a 45 deg angle from the horizontal.
(2) On low deck balustrades, they shall be located below the handrail height. The centerline of the button shall be located on a radial line 45 deg above the horizontal, such that no part of the button assembly is within 38 mm (1.5 in.) of the bottom of the handrail and the button is no more than 90 mm (3.5 in.) from the bottom of the handrail.
(b) Cover, Alarm, and Marking. The buttons shall be covered with a transparent cover that can be readily lifted or pushed aside. When the cover is moved, an audible warning signal shall be activated. The signal shall have a sound intensity of 80 dBA minimum at the button location. The cover shall be marked "EMERGENCY STOP," "MOVE COVER" or an equivalent legend (e.g., "LIFT COVER," "SLIDE COVER,"), and "PUSH BUTTON." "EMERGENCY STOP" shall be in letters not less than 12 mm (0.5 in.) high. Other required wording shall be in letters not less than 4.8 mm (0.188 in.) high. The cover shall be self-resetting.
(c) Operation. The operation of either of these buttons shall cause initiation of dynamic braking (220.127.116.11.4) or the electric power to be removed from the escalator driving-machine motor and brake. It shall not be possible to start the escalator by these buttons.
(1) if a step chain breaks
(2) where no automatic chain tension device is provided, if excessive sag occurs in either step chain
(b) The device shall be the manual-reset type.
(b) be the manually opened and closed type
(c) have red operating handles or buttons
(d) be conspicuously and permanently marked "STOP," and shall indicate the "STOP" and "RUN" positions
(e) have contacts that are positively opened mechanically and their opening shall not be solely dependent on springs
(a) an object becomes caught between the handrail and the handrail guard
(b) an object approaches the area between the handrail and the handrail guard
For those units that rely on an opening of the balustrade to prevent entrapment, all handrail entry devices shall be operative whenever the handrails are operating. The device shall be the manual-reset type, or it shall be permitted to automatically reset not more than one time within 24 h of operation and thereafter require a manual reset before the next restart. Interruption of power during operation should not cause the device to lose the status of the timer nor the count of events.
(a) a horizontal force not greater than 1780 N (400 lbf) in the direction of travel is applied at either side, or not greater than 3560 N (800 lbf) at the center of the front edge of the combplate
(b) a resultant vertical force not greater than 670 N (150 lbf) in the upward direction is applied at the center of the front of the combplate
These devices shall be the manual-reset type.