IEEE 2789:2025

New IEEE Standard - Active - Draft.
This guide explains the cable requirements for enclosed transit infrastructure in the USA and Canada. It focuses on public underground systems for passenger transport, such as metro tunnels and stations. It discusses the adoption of the NFPA 130-2023 standard by transit authorities and wire and cable requirements for different applications. The guide does not address open/above ground transit infrastructure, rolling stock, or railway vehicles. It details considerations by NFPA 130-2023 for flame propagation, smoke release, and circuit-integrity. Various cable types including general purpose, fire-resistive, train signaling, traction power, communication, and antenna cables are discussed. Emphasis is placed on compliance with NRTL Listings such as wet ratings, conductor temperature ratings, and flame propagation standards.

This guide provides information for the selection and application of cables installed in the USA and Canada enclosed, underground transit infrastructure excluding cables that are used on railway vehicles and rolling stock. This guide is not a cable design document, although many of the problems associated with the application of cables for transit infrastructure may be avoided by its use.
The purpose of this document is to provide guidance for the selection and application of cables that are used in USA and Canada enclosed, underground transit infrastructure.
This guide explains the cable construction, common applications and applicable industry standards. In this capacity, it contains references and a cross-reference list of standards as they apply to the wire and cable industry. It provides application guidelines for the various cable types as they relate to chemical, electrical, mechanical, optical, physical, and thermal properties and with consideration for their environments.