OESC 620.37 Wiring in Hoistways, Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces.

In Oregon, Raceways and conduits for the connection of elevator devices shall only enter the machine room to the extent necessary to connect the devices attached thereto.
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In Oregon, Raceways and conduits for the connection of elevator devices shall only enter the machine room to the extent necessary to connect the devices attached thereto.

NEC 620.37 covers wiring in hoistways, machine rooms, control rooms, machinery spaces, and control spaces related to the elevator.

In the OESC, this section was amended to address conduits and raceways related to such areas as follows:

620.37 Wiring in Hoistways, Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces.

(A) Uses Permitted. Electrical wiring, raceways, and cables used directly in connection with the elevator or dumbwaiter shall be permitted inside the hoistway, machine rooms, control rooms, machinery spaces, and control spaces, including wiring for the following:

(Items (1) through (7) remain unchanged.)

Conduits and raceways necessary for the connection of such devices shall only enter hoistways and machine rooms to the extent necessary to connect the devices(s) attached thereto.

Oregon amendments to the 2023 NEC® are located in “Table 1-E” of the Oregon Electrical Specialty Code (OESC) which can be seen using the following link or the OESC PDF file located near the bottom of the screen: 2023 OESC

  Click here to view the OESC  

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OESC 620.37 Wiring in Hoistways, Machine Rooms, Control Rooms, Machinery Spaces, and Control Spaces.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

According to the OESC, which of the following is true regarding conduits or raceways entering an elevator machine room?

A: Any conduit may enter an elevator machine room as long as proper fire stopping of penetrations is addressed.
B: Exposed, non-elevator associated communications cables are permitted to pass through the machine room.
C: A raceway necessary for the connection of elevator devices shall only enter the machine room to the extent necessary to connect the devices attached thereto.
D: Exposed, non-elevator associated raceways are permitted to pass through the machine room as long as there are no boxes within the machine room.
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