Latest Policy Technical Articles

Distribution transformers shape network voltage and fault behavior. Learn how winding configurations, vector groups, and…

Distribution transformers shape network voltage and fault behavior. Learn how winding configurations, vector groups, and grounding methods impact…

Learn how distribution transformers bridge medium-voltage feeders and end-use equipment, ensuring stable voltage through…

Learn how distribution transformers bridge medium-voltage feeders and end-use equipment, ensuring stable voltage through strategic placement,…

Learn how modern substation commissioning extends beyond plant checks to verify SCADA, comms, cybersecurity, and data…

Learn how modern substation commissioning extends beyond plant checks to verify SCADA, comms, cybersecurity, and data integrity for safe operation…

Learn how smart substations can leverage IEC 61850 and CIM for data flow. Advanced analytics and machine learning (ML)…

Learn how smart substations can leverage IEC 61850 and CIM for data flow. Advanced analytics and machine learning (ML) can turn high-res data into…

In the final part of this series, we examine substation design practices for managing two critical issues: oil…

In the final part of this series, we examine substation design practices for managing two critical issues: oil containment and noise control.

In this new article series, we look at substation design and layout planning, starting here with early stage choices and…

In this new article series, we look at substation design and layout planning, starting here with early stage choices and physical layout.

This article provides developers with step-by-step guidance in qualifying new electrical products for safety compliance…

This article provides developers with step-by-step guidance in qualifying new electrical products for safety compliance certification.

Battery-powered applications such as new-generation robots, drones, and power tools require a reduction in space and a…

Battery-powered applications such as new-generation robots, drones, and power tools require a reduction in space and a simplification of the design…

Part one of this series explored the concept of nuclear fusion. Part two focuses on the progress made in nuclear fusion…

Part one of this series explored the concept of nuclear fusion. Part two focuses on the progress made in nuclear fusion research and the ongoing…

Learn the grounding and bonding rules when powering two or more buildings or structures in the same area with a single service.

Learn the grounding and bonding rules when powering two or more buildings or structures in the same area with a single service.

This article instructs readers on how to size and select Direct On-Line motor starter parts like circuit breakers,…

This article instructs readers on how to size and select Direct On-Line motor starter parts like circuit breakers, contactors, and thermal overload…

This article introduces electrical and power system engineers to the direct on-line motor starter, including principles,…

This article introduces electrical and power system engineers to the direct on-line motor starter, including principles, operation, wiring, parts,…

Learn the rules to tap a feeder without overcurrent protection at the supply point.

Learn the rules to tap a feeder without overcurrent protection at the supply point.

Every electric circuit must have overcurrent protection. In Part 2, Learn about the protection of conductors, flexible…

Every electric circuit must have overcurrent protection. In Part 2, Learn about the protection of conductors, flexible cords, flexible cables, and…

Overcurrent can destroy electrical circuits and equipment. Learn about overcurrent and overcurrent protective devices in…

Overcurrent can destroy electrical circuits and equipment. Learn about overcurrent and overcurrent protective devices in Part 1 of this National…

Learn about voltage drop calculations in three-phase branch circuits and feeders.

Learn about voltage drop calculations in three-phase branch circuits and feeders.

Learn more formulas to calculate voltage drops in single-phase branch circuits and feeders.

Learn more formulas to calculate voltage drops in single-phase branch circuits and feeders.

Learn about voltage drops and how to calculate them in branch circuits and feeders.

Learn about voltage drops and how to calculate them in branch circuits and feeders.

Learn how to calculate branch circuits, feeders, and service in a one-family dwelling.

Learn how to calculate branch circuits, feeders, and service in a one-family dwelling.

Learn about load computations in three-phase and single-phase feeders and branch circuits.

Learn about load computations in three-phase and single-phase feeders and branch circuits.