Conn. Agencies Regs. § 19-411-C24 - Operating devices
(a)
Types of
operation. Operation of the platform from the upper or lower landings
and on the platform shall be controlled by a key. The key operated control
shall be operated by a lock having five (5) pins with the key removable only
from the "off" position. A key switch shall be provided at each station which
will allow a control switch at that station to become effective only when the
key is in the "on" position. "Up" and "down" control switches at all stations
shall be by means of a constant pressure device.
(b)
Control and operating circuit
requirements. The design and installation of the control and operating
circuits shall conform to the following:
(1)
Control systems which depend on the completion or maintenance of an electric
circuit shall not be used for:
A. Interruption
of the power and application of the machine brake at terminals.
B. Stopping the machine when the safety
applies.
(2) If springs
are used to actuate switches, contractors, or relays to break the circuit to
stop an elevator at the terminal, they shall be of the restrained compression
type.
(3) The failure of any single
magnetically operated switch, relay or contractor, to release in the intended
manner or the occurrence of a single accidental ground shall not permit the car
to start if the hoistway door or platform door or gate is not in the closed
position. It shall not permit the platform to move more than two inches away
from a floor with the entrance door unlocked.
Notes
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