(a) Required on Passenger Elevator Hoistway
Doors. All passenger elevator hoistway doors shall be equipped with approved
hoistway-unit-system hoistway door interlocks.
EXCEPTIONS TO SUBSECTION
3021(a):
EXCEPTIONS:
1.
Existing manually operated hoistway doors of elevators having a rated speed of
not more than 150 fpm (0.76 m/s) and a rise of not more than 20 ft (6.10 m)
which are provided with interlocks and zone switches as described for doors in
section
3021(d)(1)(D).
2. Manually operated doors at the lowest
landing, or at the ground floor of elevators with only one floor below the
ground floor, provided that no other entrances are in line on floors above or
below and the doors are equipped with interlocks and zone switches as described
for doors in section
3021(d)(1)(D).
3. Existing basement doors provided with
interlocks and zone switches as described for doors in section
3021(d)(1)(D).
(b) Required on Freight Elevator Hoistway
Doors. All freight elevator hoistway doors shall be equipped with approved
hoistway-unit-system hoistway door interlocks.
EXCEPTIONS TO SUBSECTION
3021(b):
1. Manually operated hoistway doors for
freight elevators having a rated speed of not more than 150 fpm (0.76 m/s) and
a rise of not more than 20 ft (6.10 m) which are provided with interlocks and
zone switches as described for doors in section
3021(d)(1)(D).
2. Manually operated doors at the lowest
landing, or at the ground floor of elevators with only one floor below the
ground floor, provided that no other entrances are in line above or below and
the doors are equipped with interlocks and zone switches as described for doors
in section
3021(d)(1)(D).
3. Existing installations, completed before
June 5, 1947, of interlocks or contact locks which approximately fulfill the
functions required for approved interlocks or contact
locks.
(c) Required on
Freight Elevator Hoistway Gates.
(1) All
existing freight elevator hoistway gates shall be equipped with either approved
hoistway-unit-system interlocks or with approved combination mechanical locks
and electric contacts (contact locks).
(2) All new freight elevator hoistway gates
shall be equipped with approved hoistway-unit-system interlocks.
EXCEPTIONS TO SUBSECTION
3021(c)(2):
1. Manually operated hoistway gates for
freight elevators having a rated speed of not more than 150 fpm (0.76 m/s) and
a rise of not more than 20 ft (6.10 m) which are provided with interlocks and
zone switches as described for doors in section
3021(d)(1)(D).
2. Manually operated gates at the lowest
landing, or at the ground floor of elevators with only one floor below the
ground floor, provided that no other entrances are in line above or below and
the gates are equipped with interlocks and zone switches as described for doors
in section
3021(d)(1)(D).
3. Existing installations, completed before
June 5, 1947 of interlocks or contact locks which approximately fulfill the
functions required for approved interlocks or contact
locks.
(d)
Hoistway Door Interlocks and Operating Cams.
(1) Operation of the driving machine when a
hoistway door is unlocked is permissible only under the following conditions:
(A) By a car-leveling or truck-zoning
device.
(B) By a combination
hoistway access switch and operating device on constant-pressure or car-switch
type elevators.
(C) When a hoistway
access switch is operated.
(D)
Those manually operated doors specified in Exceptions No. 1 and No. 2, section
3021(a), and in
Exceptions No. 1 and No. 2, section
3021(b), may be
equipped with interlocks that are unlocked by a stationary cam on the car,
provided the circuits are so arranged that the power will be cut off the
machine and the brake applied, if the door is not closed or if the car travels
more than one foot away from the floor before the door is locked.
(E) When the elevator is equipped with an
advance start or pulse start feature that allows the building up of the
starting motor torque while the doors are in the last phase of the closing
operation and may result in the car moving a short distance away from the floor
if the closing of the doors is interrupted. This feature will be allowed only
after written approval has been granted by the division.
(F) Existing elevators equipped with
emergency release buttons permitted by the exception to section
3021(i).
(G) Elevators which can be started from the
car only may be provided with an auxiliary lock at the lowest landing used in
connection with the unlocking means for the lowest landing door so arranged
that the car can leave the landing with the auxiliary lock in the unlocked
position provided the circuits are so arranged that the power will be cut off
and the brake applied should the car travel more than one foot away from the
landing before the auxiliary lock locks.
(2) Interlocks shall conform to the following
requirements:
(A) Interlock contacts shall be
positively opened by the locking member or by a member connected to and
mechanically operated by the locking member, and the contacts shall be
maintained in the open position by the action of gravity or by means of the
opening member.
(B) The interlock
shall hold the door in the locked position by means of gravity or by a
restrained compression spring on a rod or in a tube, or by both, or by means of
the opening member.
(C) The
interlock shall lock the door in the closed position before the driving machine
can be operated by the normal operating device.
Devices which permit operation of the driving machine
by the normal operating device before the door is closed, or when the door is
closed but before it is locked, are not interlocks and are not permitted where
interlocks are required by these regulations.
EXCEPTION TO SUBSECTION
3021(d)(2)(C):
As provided in section
3021(d)(1).
(D) Elevator hoistway doors or gates shall
not be arranged to be unlocked from outside the hoistway except where the
unlocking means is of a type which cannot function unless the elevator car is
at or within 30 in. (762 mm) of the landing.
EXCEPTION TO SUBSECTION
3021(d)(2)(D):
Doors or gates at the lowest landing that are equipped
with auxiliary locks zoned so the power will be cut off the machine and the
brake applied if the door is not closed or if the car travels more than one ft
(305 mm) away from the floor, before the door is locked.
(E) Interlocks used with multi-section doors
shall conform to the following requirements:
1. They shall lock all sections of the door,
but may be applied to only one section of the door, provided the device to
interconnect the door sections is so arranged that the locking of one section
insures that all sections are closed and cannot be opened.
EXCEPTIONS TO SUBSECTION
3021(d)(2)(E):
1. Existing swing sections with auxiliary
contacts on the section held closed by an overlapping astragal on the door
equipped with an interlock.
2.
Vertically sliding bi-parting doors installed before June 5,
1947.
2. Where used with
vertically sliding biparting counterbalanced doors, they shall be so arranged
that the interlock contacts are mechanically held in the open position by the
door or devices attached thereto unless the door is in the closed
position.
3. Where used with
center-opening horizontally swinging doors, both door sections shall be
equipped with interlocks.
4. Where
a door-closer, used with a combination sliding and swinging door, is arranged
to be disconnected to allow the sliding panel to swing, it shall be so designed
and installed that it shall not make the interlock contact when disconnected
and released.
(F)
Interlock systems employing a single master switch for more than one door are
prohibited.
(3) Retiring
cams used to actuate an interlock shall exert a force at least double the
average force required to operate the interlock and shall have a movement at
least ½ in. (13 mm) more than the average movement required to operate
the interlock. An interlock retiring cam shall be permanently marked by the
manufacturer with:
(A) Its rated horizontal
force.
(B) Its rated horizontal
movement.
(4) The
vertical face of any retiring cam, used for operating an interlock shall not
exceed 18 in. (457 mm) in length unless the elevator is arranged to level
automatically and is equipped with power-opened landing doors.
EXCEPTIONS TO SUBSECTION
3021(d)(4):
1. Elevators equipped with a truck-loading
device.
2. Cams installed on
elevators before June 5, 1947.
(5) Interlocks shall be so located that they
are not accessible from the landing side when the hoistway doors are
closed.
(e) Hoistway Gate
Combination Mechanical Locks and Electric Contacts (Contact Locks).
(1) Hoistway gate combination mechanical
locks and electric contacts are permitted for hoistway gates of existing
freight elevators only.
(2)
Operation of the driving machine when a hoistway gate is not in the closed
position is not permissible.
EXCEPTION TO SUBSECTION
3021(e)(2):
By a car-leveling or truck-zoning
device.
(3) Contact locks
shall conform to the following requirements.
(A) Contact locks, except existing locks
installed before 1947, shall be so designed and installed that the locking
member and the electric contact are in a single unit. They shall be so
installed and adjusted that the electric contact cannot close until the gate is
in the closed position and so that the locking member is in a position to lock
the gate when or before the contact closes.
(B) The electric contact shall be positively
opened by the locking bar of the mechanical lock, or by a lever or other device
attached to and operated by the gate, and the contact shall be maintained in
the open position by means other than depending solely on the operation of a
spring or springs.
(C) The function
of a contact lock to hold a gate in the locked position shall not depend solely
on a spring or springs, except that a coil (helical) spring in compression may
be used if retained on a rod or in a tube to prevent separation in case of
failure.
(D) Contact locks used
with multisection gates shall conform to the following requirement.
1. They shall lock all sections of the gate,
but may be applied to only one section provided the device used to interconnect
the gate sections is so arranged that the locking of one section insures that
all sections are closed and cannot be opened.
(4) The vertical face of any cam used for
operating a contact lock shall not exceed 18 in. (457 mm) in length.
EXCEPTION TO SUBSECTION
3021(e)(4):
Elevators equipped with a truck-loading
device.
(f) Tests
and Approvals.
(1) Each type and make of
hoistway door interlock and hoistway gate combination lock and electric contact
(contact lock) shall be approved by the Division of Occupational Safety and
Health. See Design section
3110.
(2) Approved devices shall be marked for
identification. The marking shall be permanent and shall include the following:
(A) Manufacturer's name or
trademark.
(B) Type of style letter
or number.
(C) Rated
Voltage.
(D) Rated test force and
test movement on installations requiring a retiring
cam.
(g) Closed
Position of Hoistway Doors. Hoistway doors shall be considered to be in the
closed position under the following conditions:
(1) For horizontally sliding or swinging
doors, when the leading edge of the door is within 3/8 in. (9.5 mm) of the
nearest jamb or when the panels of horizontally sliding center-opening doors
are within 3/8 in. (9.5 mm) of contact with each other.
EXCEPTION TO SUBSECTION
3021(g)(1):
The doors shall be considered to be in the closed
position at 4 in. (102 mm) from the jamb on existing elevators provided:
1. The elevator can be started from the car
only.
2. The doors are provided
with closers to fully close and lock the door after the car has
started.
3. The doors cannot be
reopened from the landing side within the 4 in. (102 mm) zone.
4. If such elevators can be converted to
collective operation for night service, the closed position shall be not more
than 2 in. (51 mm) when on the automatic operation.
(2) For vertically sliding biparting
counterbalanced doors, when the closing doors are not more than ¾ in.
(19 mm) from their stopped position. See section
3020(b)(6)(C).
EXCEPTION TO SUBSECTION
3021(g)(2):
This distance may be increased to 1 ¼ in. (31
mm) when new safety astragals are installed to replace existing solid
astragals.
(h)
Closed Position of Hoistway Gates. Hoistway gates shall be considered to be in
the closed position under the following conditions.
(1) For vertically sliding, counterbalanced
gates, when the space between the bottom of the gate and the sill is not more
than 2 in. (51 mm).
(2) For
horizontally sliding or swinging gates, when the space between the edge of the
gate and the nearest face of the strike jamb does not exceed 2 in. (51
mm).
(i) Interlock
By-Pass Switch (Emergency Release). No emergency release switch shall be
provided in or on any elevator to render the hoistway door interlocking circuit
or the car door or gate contact circuit inoperative.
EXCEPTION TO SUBSECTION
3021(i):
Existing elevators which can be started from the car
only that are provided with a constant pressure key switch or a constant
pressure button requiring a pressure of at least 10 lbf (44.5 N) to operate.
This device shall be located above the normal operating device not less than 6
ft (1.83 m) above the car floor.
(j) Elevator Parking Device. An elevator
parking device shall be provided on car switch elevators at one landing, and
may be provided at other landings, except on elevators having hoistway doors
which are automatically unlocked when the car is within the landing zone.
Parking devices shall conform to the following
requirements:
(1) They shall be
mechanically or electrically operated.
(2) They shall be so designed and installed
that friction or the breaking of any spring used in the device will not permit
opening or unlocking a door when the car is outside the landing zone of that
floor.
(3) Springs, where used,
shall be of the restrained compression type which will prevent separation of
parts in case the spring breaks.
(k) Hoistway Access Switches.
(1) Elevators equipped with power-operated
hoistway doors or elevators equipped with manually operated vertical biparting
doors shall be provided with access switches at one upper landing to permit
access to the top of the car, and at the lowest landing to permit access to the
pit if this landing is the normal point of access to the pit.
EXCEPTION TO SUBSECTION
3021(k)(1):
Access to the top of elevators with a travel 15 ft
(4.57 m) or less.
(A) Observation
elevators with manually operated hoistway doors shall be provided with access
switches at one upper landing to permit access to the top of the
car.
(2) Hoistway access
switches shall conform to the following:
(A)
The switch shall be installed only at access landings.
(B) The switch shall be installed in the
hoistway entrance frame or within 12 in. (305 mm) of the entrance frame of the
elevator with which it is identified, and not less than 3 ft (914 mm) nor more
than 78 in. (1.98 m) above floor level.
(C) The switch shall be of the
continuous-pressure, spring return type, and shall be operated by a cylinder
type lock having not less than a 5-pin or 5-disc combination with the key
removable only when the switch is in the off position. The lock shall not be
operable by any key which will operate locks or devices used for other purposes
in the building except where locks are provided in the car top emergency exit
covers the key may also unlock the exit cover. The key shall be available to
and used only by elevator inspectors, maintenance men, and
repairmen.
(3) The
operation of the switch at either access landing shall permit, and may initiate
and maintain, movement of the car with the hoistway door at this landing
unlocked or not in the closed position; and with the car door or gate not in
the closed position, subject to the following:
(A) The operation of the switch shall not
render ineffective the hoistway door interlock at any other landing.
(B) The car cannot be operated at a speed
greater than 150 fpm (0.76 m/s).
(C) For automatic and continuous pressure
operation elevators, provided:
1. Landing
operating devices of continuous pressure operation elevators, and car and
landing operating devices of automatic operation elevators, shall first be made
inoperative by means other than the access switch. This means shall be located
in the car and shall be key operated or located behind a locked
cover.
2. Power operation of the
hoistway door and the car door or gate is inoperative.
(D) Automatic operation by a car-leveling
device is inoperative.
(E) The
top-of-car operating device is inoperative.
(F) The movement of the car initiated and
maintained by the top access switch shall be limited in the down direction to a
travel not greater than the height of the car crosshead above the car platform,
and limited in the up direction above the access landing to the distance the
car apron extends below the car platform.
(4) Where electrically operated switches,
relays, or contractors are used to render inoperative the hoistway door
interlock or the car door or gate contact, the control circuits shall be
arranged to conform to the requirements of section
3040(f)(3); and,
in addition, to render the normal car and hall operation ineffective if any
such switch, relay, or contractor fails to function in its intended
manner.
(l) Passenger
elevators installed after January 1, 1989 shall have the hoistway and/or car
doors arranged as follows:
(1) When a car is
outside the unlocking zone, the hoistway doors or car doors shall be so
arranged that the hoistway doors or car doors cannot be opened more than 4 in.
(102 mm) from inside the car.
(2)
When the car doors are so arranged that they cannot be opened when the car is
outside the unlocking zone, the car doors shall be openable from outside the
car without the use of special tools.
(3) The unlocking zone shall extend from the
landing floor level to a point no greater than 18 in. (457 mm) above or below
the landing floor level.
(4) The
arrangement required by subsection
3021 (
l)(1) shall
not restrict the opening to the extent that the floor numbers required by
subsection
3041(c)(5) cannot
be located and observed.
(5) The
arrangement required by subsection
3021 (
l)(2) shall
not constitute a violation of subsection
3022(c)(5) if the
doors can be opened sufficiently to determine the numbers required by
subsection
3041(c)(5).
Title 24, part 7, section
7-3021
Notes
Cal. Code Regs. Tit. 8, §
3021
1.
Amendment of subsection (k)(1) filed 10-25-74; effective thirtieth day
thereafter (Register 74, No. 43).
2. Amendment of subsections (a),
(d)(2)(D), (d)(2)(E), (J), (k)(4) and new Exceptions of subsection (c) filed
6-23-77; effective thirtieth day thereafter (Register 77, No.
26).
3. Repealer and new subsection (k)(2) filed 12-22-78; effective
thirtieth day thereafter (Register 79, No. 1).
4. Amendment filed
6-23-87; operative 6-23-87 (Register 87, No. 27).
5. Change without
regulatory effect filed 6/21/90 pursuant to section
100, title 1, California Code of
Regulations (Register 90, No. 35).
6. Editorial correction of
printing error in subsection (l) (Register 91, No. 32).
7. Amendment
of subsection (k)(1) and Reference citation added; filed 7-1-91; operative
7-31-91 (Register 91, No. 43).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code; and Section
18943,
Health and Safety Code.
1. Amendment of
subsection (k)(1) filed 10-25-74; effective thirtieth day thereafter (Register
74, No. 43).
2. Amendment of subsections (a), (d)(2)(D), (d)(2)(E),
(J), (k)(4) and new Exceptions of subsection (c) filed 6-23-77; effective
thirtieth day thereafter (Register 77, No. 26).
3. Repealer and new
subsection (k)(2) filed 12-22-78; effective thirtieth day thereafter (Register
79, No. 1).
4. Amendment filed 6-23-87; operative 6-23-87 (Register
87, No. 27).
5. Change without regulatory effect filed 6/21/90
pursuant to section 100, title 1, California Code of Regulations (Register 90,
No. 35).
6. Editorial correction of printing error in subsection (
l) (Register 91, No. 32).
7. Amendment of subsection (k)(1) and
Reference citation added; filed 7-1- 91; operative 7-31-91 (Register 91, No.
43).
Group II regulations apply to existing elevators installed
prior to October 25, 1998. Italicized paragraphs, sentences, or phrases apply
to all existing elevators while non-italicized apply to elevators installed
after 1970 or after the date the regulation was
adopted.