IEEE P738/D2

P738/D2 is the revised standard for Temperature of Bare Overhead Conductors, a technical document focused on how conductor temperature is considered in power, energy, and industrial applications. It is relevant where overhead line performance depends on thermal behavior, loading, and operating limits. By addressing a specific aspect of bare conductor temperature, P738/D2 helps support more consistent engineering decisions for transmission and distribution work.

P738/D2 overview

This standard provides a structured basis for understanding temperature-related considerations for bare overhead conductors. In power-system applications, conductor temperature can influence sag, electrical performance, and allowable loading, so a defined reference is useful for design and operational planning. As a revision of 738-1993, P738/D2 indicates an updated technical treatment of the subject, making it useful for teams that need a clear, standards-based point of reference for conductor temperature discussions and related engineering practice.

Typical use cases

P738/D2 may be used when reviewing overhead line design data, checking thermal assumptions for bare conductors, or supporting loading studies for utility and industrial power networks. It is also relevant in procurement and specification work where conductor performance requirements must be stated clearly. Engineers, consultants, and asset managers may refer to it when comparing line ratings, evaluating operating conditions, or coordinating temperature-related considerations in transmission and distribution projects.

Why this standard matters

This standard matters because conductor temperature affects both technical performance and operational risk. Using a recognized reference can improve consistency in design reviews, testing assumptions, and compliance-related documentation. For organizations working with overhead conductors, P738/D2 helps reduce ambiguity around temperature considerations that may affect safety margins, reliability, and asset planning. It can also support clearer communication between design, procurement, and field engineering teams.

• Bare overhead conductors
• Temperature-related performance
• Power and energy applications
• Revision of 738-1993
• Design and operating guidance