When the NEC^® requires a product to be “listed” such as for luminaires in NEC^® Section 410.6 or automatic transfer switches for emergency use such as in NEC^® 700.5(C), this means that the product must be approved by one of the several OSHA approved Nationally Recognized Testing Laboratories (NRTL’s).

The NRTL’s commonly use the term “certified” to describe a product that has been listed.

The Oregon OESC states the following in section 90.4(D):

OESC 90.4(D) New Products, Constructions, or Materials. This Code may require new products, constructions, or materials that may not yet be available at the time the Code is adopted. In such event, the authority having jurisdiction may permit the use of the products, constructions, or materials that comply with the most recent previous edition of this Code adopted by the jurisdiction.

Where the NEC^® requires electrical products to be “listed” or “labeled”, the words “listed” or “labeled” shall have the same meaning as “certified electrical product” under ORS 479.530.

The occupancy classification and use designations shall be established in accordance with the Oregon Structural Specailty Code (OSSC), as stated on the construction documents by the registered design professional and approved by the building official.

The electrical datum plane as used throughout the OESC shall be the Design Flood Elevation as determined by the flood plain administrator in accordance with the Oregon Structural Specialty Code (OSSC) or Oregon Residential Specialty Code (ORSC) as applicable.

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