or surface of the walls, ceiling, or floor of the hoistway.

Signal Equipment. Includes audible and visual equipment such as chimes, gongs, lights, and displays that convey information to the user.
FPN No. 1: The motor controller, motion controller, and operation controller may be located in a single enclosure or a combination of enclosures.
FPN No. 2: FPN Figure 620.2 is for information only.
620.3 Voltage Limitations. The supply voltage shall not exceed 300 volts between conductors unless otherwise permitted in 620.3(A) through (C).
(A) Power Circuits. Branch circuits to door operator controllers and door motors and branch circuits and feeders to

Motion control

Position and speed-sensing

devices

Operation control Motor controller

Door

(Open

Car operation control

>Car assignment

>Operating device interface

•Fixture interface

• Load

Position

Run/stop

Direction

Dictation control

• Stop control

■ Direction

• Auto/manual

Dictation

■ Pattern generator '

Brake control ' Motor field

Dictation

Emergency stop

Status

Power converter

•ac motor control

•dc motor control

•Hydraulic valve control

Machine

power

Moving member

• Motor

• Hydro piston

' operator

Ictost

Car and

j group \*~

I operating | I I

Car I and I group i<- signal

1 fixtures '

weighing

dispatch

Group operation control

•Hall call assignment

•Operating device interface

• Fixture interface

Auto/manual

• Car . | -I- operation

control

control

Load weighing

Electrical protective devices

Starter

■ Across the line • Resistance > Wye- delta

Input power/standby power

FPN Figure 620.2 Control System.
motor controllers, driving machine motors, machine brakes, and motor-generator sets shall not have a circuit voltage in excess of 600 volts. Internal voltages of power conversion equipment and functionally associated equipment, and the operating voltages of wiring interconnecting the equipment, shall be permitted to be higher, provided that all such equipment and wiring shall be listed for the higher voltages. Where the voltage exceeds 600 volts, warning labels or signs that read "DANGER — HIGH VOLTAGE" shall be attached to the equipment and shall be plainly visible.

(B) Lighting Circuits. Lighting circuits shall comply with the requirements of Article 410.

(C) Heating and Air-Conditioning Circuits. Branch cir- cuits for heating and air-conditioning equipment located on the elevator car shall not have a circuit voltage in excess of 600 volts.

620.4 Live Parts Enclosed. All live parts of electrical ap paratus in the hoistways, at the landings, in or on the cars of elevators and dumbwaiters, in the wellways or the landings of escalators or moving walks, or in the runways and machinery spaces of platform lifts and stairway chairlifts shall be enclosed to protect against accidental contact.

FPN: See 110.27 for guarding of live parts (600 volts, nominal, or less).

620.5 Working Clearances. Working space shall be provided about controllers, disconnecting means, and other electrical equipment. The minimum working space shall be not less than that specified in 110.26(A).

Where conditions of maintenance and supervision ensure that only qualified persons examine, adjust, service, and maintain the equipment,
the clearance requirements of 110.26(A) shall be waived as permitted in 620.5(A) through (D).
(A) Flexible Connections