of not less than 200°C (392°F). Conductors shall be
Type SF or equivalent.

(B) Traveling Cables. Traveling cables used as flexible connections between the elevator or dumbwaiter car or counterweight and the raceway shall be of the types of elevator cable listed in Table 400.4 or other approved types.

(C) Other Wiring. All conductors in raceways shall have flame-retardant insulation.

Conductors shall be Type MTW, TF, TFF, TFN, TFFN, THHN, THW, THWN, TW, XHHW, hoistway cable, or any other conductor with insulation designated as flame

Common feeder Feeder

demand factor

Motor feeder short- circuit and ground- fault protection

Disconnecting means

Motor branch-circuit short-circuit and ground- fault protection

620.14

620.61(C)

620.51

620.61(D)

620.13

Branch-circuit conductors

determined from Table 430.22(E), 430.24 and 430.24, Exception No. 1.

External transformer

(optional)

Motor controller Motor control circuits

Motor overload protection

Motor conductors

Motor

Thermal protection

Figure 620.13 Single-Line Diagram.

Article 450

620.13.620.15

620.61(A)

620.61(B)

620.13

Article 430, Part I Article 430, Part III

FPN: See Annex D, Example Nos. D9 and D10.

620.14 Feeder Demand Factor. Feeder conductors of less ampacity than required by 620.13 shall be permitted, subject to the requirements of Table

620.14.

Table 620.14 Feeder Demand Factors for Elevators

Number of Elevators

on a Single Feeder Demand Factor

1 1.00

2 0.95

3 0.90

4 0.85

(A) Conductors Supplying Single Motor. Conductors supplying a single motor shall have an ampacity not less than the percentage of motor nameplate current determined from 430.22(A) and (E).

FPN: Elevator motor currents, or those of similar functions, may exceed the nameplate value, but because they are inherently intermittent duty and the heating of the motor and conductors is dependent on the root-mean-square (rms) current value, conductors are sized for duty cycle service as shown in Table 430.22(E).

(B) Conductors Supplying a Single Motor Controller. Conductors supplying a single motor controller shall have an ampacity not less than the motor controller nameplate current rating, plus all other connected loads.

FPN: Motor controller nameplate current rating may be derived based on the rms value of the motor current using an intermittent duty cycle and other control system loads, if applicable.

(C) Conductors Supplying a Single Power

Transformer.

Conductors supplying a single power transformer shall have an ampacity not less than the nameplate current rating of the power transformer plus all other connected loads.
FPN No. 1: The nameplate current rating of a power transformer supplying a motor controller reflects the nameplate current rating of the motor controller at line voltage (transformer primary).
FPN No. 2: See Annex D, Example No. D10.

(D) Conductors Supplying More Than One Motor, Mo tor Controller, or Power Transformer. Conductors sup plying more than one motor, motor controller, or power transformer shall have an ampacity not less than the sum of the nameplate current ratings of the equipment plus all other connected loads. The ampere ratings of motors to be used in the summation shall be

5 0.82

6 0.79

7 0.77

8 0.75

9 0.73
10 or more 0.72
FPN: Demand factors are based on 50 percent duty cycle (i.e., half time on and