IEEE P2939/D3, May 2023

IEEE P2939/D3, May 2023 is an approved draft guide focused on the joint use of electric power transmission and distribution facilities and equipment. It addresses the technical and operational considerations that arise when T&D assets are shared or coordinated across functions, where fields, waves, and electromagnetics may affect design and performance. For utilities, engineers, and planners, the document can help support more consistent decisions around compatibility, coordination, and safe utility infrastructure use.

About IEEE P2939/D3, May 2023

IEEE P2939/D3, May 2023 is intended as a guide rather than a prescriptive product standard, so its value lies in clarifying how joint use arrangements for transmission and distribution facilities and equipment may be approached. The technical context suggests attention to electromagnetic interactions, facility interfaces, and the practical constraints of shared utility assets. It is relevant where multiple parties, functions, or equipment types must operate within the same power corridor or substation environment while maintaining orderly engineering control and acceptable performance.

Where is IEEE P2939/D3, May 2023 used?

This standard may be used in electric power transmission corridors, distribution networks, substations, and other utility environments where facilities and equipment are jointly deployed or coordinated. It is most relevant to engineering teams, asset managers, and operations groups that must assess how shared infrastructure behaves under real-world electrical conditions. IEEE P2939/D3, May 2023 can also support planning and review activities involving conductor arrangements, equipment interfaces, and electromagnetic compatibility concerns in T&D systems.

Importance in practice

In practice, IEEE P2939/D3, May 2023 matters because joint use of T&D facilities can introduce coordination risks if technical expectations are not clearly defined. A guide of this type can support more consistent design review, procurement language, and operating procedures, especially where multiple assets or stakeholders depend on the same infrastructure. It may also help reduce misalignment during testing, installation, and maintenance by providing a common reference for engineering judgment and system compatibility.

• Joint use of transmission and distribution assets
• Electromagnetic and field-related considerations
• Utility interface and coordination planning
• Shared equipment and facility review
• Engineering guidance for T&D environments