Active Standard

IEEE 738-2023

IEEE Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors

A numerical method by which the core and surface temperatures of a bare overhead conductor are related to the steady or time-varying electrical current and weather conditions is described in this standard. Contents discussed also include how this method may be used to determine the conductor's current for a corresponding conductor temperature limit. Please note the content in this standard does not recommend suitable weather conditions or conductor parameters for use in line rating calculations.

Standard Committee
PE/T&D - Transmission and Distribution
Status
Active Standard
PAR Approval
2020-03-05
Superseding
738-2012
Board Approval
2023-06-29
History
Published:
2023-12-19

Working Group Details

Society
IEEE Power and Energy Society
Standard Committee
PE/T&D - Transmission and Distribution
Working Group
738_WG - Conductor Working Group P738
IEEE Program Manager
Michael Kipness
Contact Michael Kipness
Working Group Chair
Cody Davis

Other Activities From This Working Group

Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.


No Active Projects

Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.


No Active Standards

These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.


738-1986
IEEE Standard for Calculation of Bare Overhead Conductor Temperature and Ampacity Under Steady-State Conditions

The purpose of this standard is to present a simplified method of calculating the current-temperature relationship of bare over-head lines when given the weather conditions.

Learn More About 738-1986

These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.


No Inactive-Withdrawn Standards

These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.


738-2012
IEEE Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors

A method of calculating the current-temperature relationship of bare overhead lines, given the weather conditions, is presented. Along with a mathematical method, sources of the values to be used in the calculation are indicated. This standard does not undertake to list actual temperature-ampacity relationships for a large number of conductors nor does it recommend appropriately conservative weather conditions for the rating of overhead power lines. It does, however, provide a standard method for doing such calculations for both constant and variable conductor current and weather conditions.

Learn More About 738-2012

738-2012/Cor 1-2013
IEEE Approved Draft Standard for Calculating the Current-Temperature Relationship of Bare Overhead Conductors - Corrigendum 1

Technical corrections are addressed in this corrigendum. (NOTE: This corrigendum was not published as an individual standard. It was incorporated into IEEE Std 738-2012 at the time of publication)

Learn More About 738-2012/Cor 1-2013

Subscribe to our Newsletter

Sign up for our monthly newsletter to learn about new developments, including resources, insights and more.