February 2026 Electrical Engineering Standards: Essential New Updates (Part 3)

Electrical engineering professionals are seeing a significant cycle of international standards updates this February. The latest IEC publications enhance precision, safety, and interoperability across power transmission, inductive component manufacture, and live working operations. This article—Part 3 of 4 in our February series—covers five crucial standards that will shape design, procurement, compliance, and safety throughout the industry.

Overview / Introduction

Electrical engineering underpins much of the modern world, from high-voltage energy transmission to the intricate components within industrial electronics. International standards in this sector set the benchmarks for safety, interoperability, and quality—maximizing operational reliability and reducing compliance risk.

This feature presents the detailed scope and implications of February 2026's newly published IEC standards covering ferrite core components (PM-cores, RM-cores, planar cores), acceptance tests for ultra-high voltage (UHV) AC systems, and updated terminology for live working tools. Industry leaders, compliance managers, design engineers, and procurement specialists will find actionable guidance for adoption and implementation.

Here's what you'll learn:

• Technical requirements and changes in the latest standards
• Who must comply and why it matters
• How these standards drive product quality and operational safety
• Practical insights on implementation and global alignment

Detailed Standards Coverage

IEC 63093-10:2026 - PM-Cores: Dimensional and Surface Irregularity Guidelines

Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 10: PM-cores and associated parts

IEC 63093-10:2026 specifies dimensional standards for a preferred range of PM-cores constructed from magnetic oxide materials. It provides main dimensional parameters for both the cores and coil formers, as well as precise pin location guidelines on modular printed wiring grids. Key effective parameter values for electronic calculations and comprehensive limits on allowable surface irregularities are also detailed.

Manufacturers of inductive components (such as transformers and chokes) for power supplies or signal processing will benefit from the increased clarity and global alignment that this standard offers. Revision of Table 2 aligns effective magnetic parameter values with the newly released IEC 60205 Edition 4, ensuring more accurate performance prediction and easier cross-supplier interchangeability.

Who must comply:

• Ferrite component manufacturers
• Industrial electronics designers
• Procurement and quality teams sourcing PM-cores

Key implementation aspects:

• Use standardized testing gauges for quality assurance
• Reference allowable limits in supplier negotiations
• Integrate updated dimensions into new product development

Key highlights:

• Mechanical interchangeability for a specified range of PM-cores
• Updated effective parameter values for design calculations
• Clearer, internationally harmonized limits for surface irregularities

Access the full standard:View IEC 63093-10:2026 on iTeh Standards

IEC 63093-4:2026 - RM-Cores and Low-Profile RM-Cores: Dimensional Consistency

Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 4: RM-cores

IEC 63093-4:2026 details critical dimensions for standard and low-profile RM-cores used across a wide array of power electronics and communication equipment. The standard defines both principal core and coil former sizes, as well as standardized terminal pin layouts on the industry-accepted 2.54 mm grid. Surface quality limits ensure function and durability in industrial use.

Core suppliers, transformer designers, and buyers will find this standard particularly relevant for establishing clear, mutually understandable limits in supply contracts. Table 3 and Table 4 updates (now referencing IEC 60205 ED4) align calculation practices for effective parameters with cutting-edge international best practice.

Who must comply:

• Ferrite and magnetic materials manufacturers
• Design engineers of power supply modules
• Quality assurance professionals

Implementation implications:

• Standardized core/coil assembly across supply chains
• Greater confidence in performance data and interchangeability
• Defined negotiation reference for surface flaws and irregularities

Key highlights:

• Inclusive of industry-standard RM-core sizes
• Pin positions set for modular printed wiring alignment
• Harmonized approaches to chipping, cracking, pull-outs, and pores

Access the full standard:View IEC 63093-4:2026 on iTeh Standards

IEC 63093-9:2026 - Planar Cores for Inductive Components

Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 9: Planar cores

IEC 63093-9:2026 serves the growing market for surface-mount and planar magnetic components. It prescribes shapes, primary dimensions, and permitted surface imperfections for planar EL, E, and ER cores as well as their mating PLT-cores. These planar cores are increasingly integrated into transformers and chokes whose windings use multilayer printed circuit technology, facilitating compact, low-profile, high-frequency applications.

Major changes in this edition address corrections in key dimension tables and amend calculation data in alignment with IEC 60205. Adherence to this sectional specification enables efficient negotiation between suppliers and device manufacturers, preventing performance losses that can result from oversized cracks, chips, or other surface flaws.

Who must comply:

• Power electronics manufacturers
• PCB-based transformer and choke suppliers
• Quality and design engineers for compact or multilayered devices

Implementation implications:

• Ensures compatibility across global vendor base for SMD transformer cores
• Sets robust surface integrity benchmarks for long-term reliability
• Harmonized metric data for design and QA processes

Key highlights:

• Focused on planar, low-height core types for cutting-edge applications
• Limits set for crack/chipping area and pull-out on critical surfaces
• Clear reference to effective parameter values in design computations

Access the full standard:View IEC 63093-9:2026 on iTeh Standards

IEC TS 63042-301:2026 - UHV AC Transmission On-Site Acceptance Tests

UHV AC transmission systems – Part 301: On-site acceptance tests

IEC TS 63042-301:2026 lays out comprehensive procedures for on-site acceptance testing of ultra-high voltage (UHV) alternating current transmission systems operating above 800 kV. The standard covers acceptance tests for a broad range of critical electrical equipment and their associated protection and control systems.

This technical specification targets engineers, project managers, and owners involved in UHV grid deployment and commissioning. Major updates include new subclauses for on-site assembled transformer load/no-load loss measurement, expanded requirements for gas insulated transmission lines (GIL), and rigorous acceptance tests for control/protection subsystems.

Who must comply:

• Utilities implementing new or upgraded UHV transmission lines
• Power project EPC contractors
• Plant and test engineers specializing in high-voltage equipment

Implementation implications:

• Improved risk management during project commissioning
• Streamlined acceptance protocols for diverse equipment (e.g., transformers, circuit breakers, shunt reactors, insulators)
• Documentation to support contractual acceptance and regulatory scrutiny

Key highlights:

• Full test coverage for AC transmission components above 800 kV
• Explicit on-site acceptance criteria for GIL and protection systems
• Detailed transformer loss and impedance measurement procedures

Access the full standard:View IEC TS 63042-301:2026 on iTeh Standards

IEC 60743:2013 (2026 Edition) - Terminology for Live Working Equipment

Live working – Terminology for tools, devices and equipment

IEC 60743:2013, updated with its latest amendment in 2026, standardizes the international terminology used for tools, devices, and equipment required for live working. It provides clear, illustrated definitions that support correct identification, communication, and training, reducing risk by avoiding misunderstandings.

This vocabulary resource complements IEC 60050-651 and incorporates updated and simplified clause structures, referencing existing detailed glossaries on the IEC Electropedia. The revised standard is essential for any organization involved in live working—ensuring that OHS personnel, trainers, and procurement teams use and understand uniform terms.

Who must comply:

• Utilities and service providers executing live working operations
• Manufacturers of tools and personal protective equipment
• Safety and training managers in electrical utilities

Implementation implications:

• Supports international harmonization of safety documents and procurement
• Streamlines training and mitigates miscommunication risks
• Enables precise specification and compliance auditing

Key highlights:

• Defined, illustrated terminology for all live working tools and PPE
• Simplified and updated reference structure linked with international vocabulary
• Aids global harmonization of safety processes and equipment lists

Access the full standard:View IEC 60743:2013 on iTeh Standards

Industry Impact & Compliance

How These Standards Affect Your Business

From component manufacturing to field commissioning and safety training, the updated standards above shape the way electrical engineering organizations source, assess, and accept crucial materials and systems.

Compliance Considerations:

• Transition Timelines: Most standards permit a reasonable transition period for design and procurement updates. Early alignment minimizes costly redesign and supply chain disruption.
• Third-Party Certification: Vendor claims should reference test results according to the new standards. Independent verification is recommended for critical and high-volume components.
• Documentation: Ensure QA, procurement, and operational documentation leverages correct terminology and specifications as updated in these publications.

Benefits of Adoption:

• Greater global supply chain flexibility and easy interchangeability
• Reduced procurement risk through harmonized specifications
• Enhanced end-product safety and reliability
• Streamlined training and onboarding using harmonized terminology

Risks of Non-Compliance:

• Supply chain breakdowns due to non-standard parts
• Regulatory delays or outright rejection
• Increased warranty and safety claims
• Loss of market access for export-focused manufacturers

Technical Insights

Common Technical Requirements

A review of these standards reveals several unifying technical threads:

• Dimensional Consistency: Precise tables for every core type, pin layout, or tool dimension underpin mechanical interchangeability and assembly automation.
• Effective Parameter Alignment: All ferrite core standards reference the latest IEC 60205, harmonizing performance calculations and removing guesswork in design.
• Surface Quality Control: Stringent limits on cracks, chips, and other irregularities support high insulation resistance, lifetime reliability, and tight magnetic coupling.
• On-site Testing Protocols: For UHV transmission, a unified protocol for each equipment class gives utilities and contractors a clear path from delivery to revenue service.
• Terminology and Illustration: The live working standard demonstrates the value of accessible, standard vocabulary in technical communication, training, and compliance.

Implementation Best Practices

• Early Design Adoption: Engineering teams should review and incorporate new dimensions and tolerances at the concept stage to avoid costly late-cycle rework.
• Supplier Qualification: Source from suppliers demonstrating compliance with the updates; request clear documentation and certification.
• Training: Educate staff using updated terminology and guidance to minimize operational and safety errors.
• Testing and Certification: Where required, validate in-house or third-party test labs against the new testing standards, especially for UHV systems.

Conclusion / Next Steps

Key Takeaways:

• February 2026 brings vital updates for ferrite core geometry, high-voltage testing, and live working terminology.
• Adherence delivers reliability, global market access, and operational safety.
• Early adoption in design, procurement, and training gives organizations a measurable competitive advantage.

Recommendations:

1. Audit existing product lines and sourcing contracts for compliance gaps.
2. Engage suppliers and certification partners early for transition planning.
3. Update internal documentation and training resources to reflect new terminology and requirements.

Explore more:

• For full access to these and other electrical engineering standards, visit iTeh Standards and stay subscribed to our ongoing coverage for future updates.

This article is Part 3 of 4 in our February 2026 Electrical Engineering Standards coverage. For previous and subsequent parts, visit standards.iteh.ai.