Draft Details

This Standard specifies the loading and strength requirements of overhead lines derived from reliability-based design principles. These requirements apply to transmission lines, but can also be applied to other lines.

This Standard deals with design criteria, using reliability concepts and employing probabilistic and/or semi-probabilistic methods. For the use and application of this Standard, Canadian climatic data have been provided based on an analysis of historical data as well as Canada-specific modelled data to account for the effects of climate change.

Although the design criteria in this standard apply to new lines, many concepts can be used to address the design and reliability requirements for refurbishment, upgrading and uprating of existing lines.

This document does not cover the detailed design of line components such as supports, foundations, conductors or insulator strings.

General requirements, clearances, separations, and spacings of overhead lines are specified in CSA C22.3 No. 1.