ELEVATORS, DUMBWAITERS,

ESCALATORS, MOVING WALKS, WHEELCHAIR LIFTS, AND STAIRWAY CHAIR LIFTS A. General 620-1. Scope. This article covers the installation of electric equipment and wiring used in connection with elevators, dumbwaiters, escalators, moving walks, wheelchair lifts, and stairway chair lifts. (FPN): For further information, see Safety Code for Elevators and Escalators, ASME/ANSI A17.1-1990. 620-2. Voltage Limitations. The nominal voltage used for elevator, dumbwaiter, escalator, moving walk, wheelchair lift, and stairway chair lift operating control and signaling circuits, operating equipment, driving machine motors, machine brakes, and motor-generator sets shall not exceed the following: (a) 300 Volts. For operating control and signaling circuits and related equipment, including door operator motors.