IEEE 1806-2021

1806-2021 is a technical standard for based placement of overhead and underground switching and overcurrent protection equipment up to and including 38 kV. It addresses how this equipment is positioned and applied in power system installations, helping support safe, consistent planning for medium-voltage distribution work. In power, energy, and industry applications, the standard is useful when engineers need guidance that aligns equipment location, protection function, and operational access.

1806-2021 overview

This standard focuses on the placement of switching and overcurrent protection equipment where overhead and underground circuits are involved. By defining a clear basis for installation decisions up to 38 kV, 1806-2021 helps support practical coordination between system layout, protection schemes, and field accessibility. It is especially relevant where equipment must be integrated into distribution networks without compromising safety, reliability, or maintainability. The document is a useful reference for engineering and specification work in power-related applications.

Typical use cases

Typical applications include planning feeder protection, selecting switch locations, and organizing equipment placement for distribution lines, substations, and sectionalizing points. The standard is also relevant when underground cable sections connect to overhead systems, or when overcurrent protection must be coordinated with switching devices. Utilities, industrial campuses, and other medium-voltage facilities may use 1806-2021 when defining installation requirements, reviewing drawings, or confirming that equipment placement supports dependable operation and maintenance access.

Why this standard matters

Clear placement guidance reduces ambiguity during design, procurement, and installation of medium-voltage equipment. 1806-2021 helps teams make consistent decisions about where switching and overcurrent protection devices should be based, which can improve safety and support reliable coordination across a distribution system. For compliance and project control, the standard can also help reduce misinterpretation between stakeholders and support more predictable performance in overhead and underground power applications.

• Based placement for switching equipment
• Overcurrent protection up to 38 kV
• Overhead and underground circuit applications
• Medium-voltage distribution planning
• Installation and coordination reference