ANSI/NETA MTS–2023 REVISION UNDERWAY
The revision of ANSI/NETA MTS-2023, Standard for Maintenance Testing Specifications for Electrical Power Equipment and Systems, is underway with an anticipated completion and publication release in March 2027 at PowerTest 2027.
This revision introduced a new Working Group model, bringing together subject matter experts from across the electrical testing industry to conduct early-stage comment review and develop three new sections. The initiative serves as a pilot program for future standards development activities and will help refine processes for the upcoming revision of ANSI/NETA ATS-2025, scheduled to begin in the Fall of 2027.
New MTS content includes the following sections:
- 7.27 Arc Energy Reduction Systems
- 7.28 Battery Energy Storage Systems (BESS)
- 7.30 Wind Turbine Systems
- Table 100.6.8 Voltage Magnitudes and Durations for Offline Cable PD Tests
MTS Document Scope
ANSI/NETA MTS establishes specifications for field testing and inspections to evaluate the continued serviceability and reliability of electrical power equipment and systems. These specifications help ensure that tested equipment operates within applicable industry standards and manufacturers’ tolerances and remains suitable for continued operation.
Key updates in the 2023 edition included a comprehensive overhaul of the Cables section and the introduction of a new section addressing Electric Vehicle Charging Systems, reflecting evolving technologies and industry needs. ANSI/NETA MTS–2023 is available for purchase at the NETA Bookstore at www.netaworld.org.
ANSI/NETA ETT–2026 NEW STANDARD REVISION APPROVED
The revision of ANSI/NETA ETT-2022, Standard for Certification of Electrical Testing Technicians, was approved by the American National Standards Institute (ANSI) on December 1, 2025. Among the key updates is a revised Detailed Content Outline (DCO) for ETT Levels 2–4.
The ANSI/NETA ETT standard defines the minimum qualifications for electrical testing technicians, including requirements for certification, training, and experience. It also outlines the criteria for documenting these qualifications and specifies the standards for an independent and impartial certifying body.
ANSI/NETA EMW–2026 NEW STANDARD APPROVED
ANSI approved ANSI/NETA EMW-2026, Standard for Qualification of Electrical Equipment Maintenance Workers for Electrical Power Equipment & Systems, on January 6, 2026. This new standard is in support of NFPA 70B, Standard for Electrical Equipment Maintenance, which meets the qualification requirements outlined in that standard for Qualified Electrical Equipment Maintenance Workers (QEMW).
The ANSI/NETA EMW standard defines the minimum requirements for the qualification of QEMWs, including training and experience prerequisites along with the necessary knowledge, skills, and abilities to perform maintenance in alignment with industry best practices, ensuring safety, consistency, and reliability across electrical equipment maintenance practices.
ANSI/NETA ATS–2025
ANSI/NETA ATS-2025, Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems, received formal approval from the American National Standards Institute (ANSI) on February 20, 2025.
This standard defines the field tests and inspections recommended to evaluate the suitability of electrical power equipment and systems prior to their initial energization. These specifications are designed to confirm that equipment is properly installed in accordance with design requirements, is operational, and performs within applicable industry standards and manufacturers’ tolerances.
The 2025 edition introduces significant new content, including:
- Section 7.28 Battery Energy Storage Systems (BESS)
- Section 7.29 Solar Photovoltaic (PV) Systems
- Table 100.6 Medium-Voltage Cables Acceptance Test Values (Tables 100.6.1 – 100.6.6)
- Appendix B Guidance for Circuit Reliability Considerations for Medium- and High-Voltage Cable Testing Methods.
A notable revision in ANSI/NETA ATS-2025 is found in Section 7.4.D.2.a-b. Metal-Enclosed Busways. This update introduces separate formulas for low-voltage and medium-voltage systems and replaces the previous nominal 1,000-foot run length with the actual busway length in feet, enhancing the applicability of testing procedures.
ANSI/NETA ATS-2025 is available for purchase through the NETA Bookstore, offered in bound print, PDF download, and a Redline PDF (with all changes highlighted) download.
ANSI/NETA ECS–2024
ANSI/NETA ECS-2024, Standard for Electrical Commissioning of Electrical Power Equipment & Systems, 2024 Edition, completed the American National Standard revision process. ANSI administrative approval was received on July 2, 2024. ANSI/NETA ECS–2024 supersedes the 2020 Edition.
ANSI/NETA ECS describes the systematic process of documenting and placing into service newly installed or retrofitted electrical power equipment and systems. This document shall be used in conjunction with the most recent edition of ANSI/NETA ATS, Standard for Acceptance Testing Specifications for Electrical Power Equipment & Systems. The individual electrical components shall be subjected to factory and field tests, as required, to validate individual components. It is not the intent of these specifications to provide comprehensive details on the commissioning of mechanical equipment, mechanical instrumentation systems, and related components.
The ANSI/NETA ECS revision includes the following new sections for Source-Specific Systems Commissioning: Photovoltaic (PV), Uninterruptible Power Supply (UPS), and Automatic Transfer Switches (ATS).
Tania Brammer is NETA’s Director of Technical Operations.
PARTICIPATION
Comments and suggestions on any of the standards are always welcome and should be directed to NETA. To learn more about the NETA standards review and revision process or to purchase these standards, please visit www.netaworld.org. To get involved, recommend revisions, or be considered for ballot pools, please visit www.netaworld.org/standards/standards-development or contact the NETA office at 888-300-6382.