Recommended Practice

Ampacities for Wire and Cable Used on Passenger Rolling Stock with Flame, Smoke and Toxicity Considerations


This recommended practice provides guidance on wire sizes, ampacities, derating and spacing for rail passenger equipment applications. It also includes flame, smoke and toxicity requirements.

Document History
Document Number Version Publication Date Publication Related Information
APTA PR-E-RP-009-98 Rev. 2 05/28/2021 Published Current
APTA PR-E-RP-009-98 06/15/1998 Published Superseded


22759/6, ampacity, cable, cross-linked polyolefin (XLPO), derating, irradiation, multifunction vehicle bus (MVB), wire, wired train bus (WTB)


This recommended practice was titled “Wiring Used on Passenger Equipment” in the previous publication of this document. This recommended practice is used for determining the correct wire rating for wire and cable used on passenger rail vehicles.

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