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NEMA’s Transformer Section, part of the Power Equipment Division, is heavily involved with domestic and international technical activities, including ANSI C57, NEMA TP 1, TP 2, TP 3, IEC TC 14 and energy efficiency considerations within U.S. Department of Energy (DOE) and the Environmental Protection Agency’s (EPA).

The section’s mission is to develop transformer product standards and advocate technical and industry positions that are in the best interests of the industry, member companies, and the users of their products throughout North America and the world.

The product links to the left and the links to the right provide the following information for specific products as well as this product area:

  • Manufacturers
  • Standards and application guides
  • Staff contacts
  • Related information

Click here for detailed product scope information.

Section activities focus on these products:

  • Dry type and dry type pad-mounted distribution transformers (including integral accessories) & URT units - all voltages - single and three phase
  • Transformers, liquid-immersed, single and three phase transformers
  • Primary unit substation transformers
  • Other types of transformers

Please see the section scopes document, available in the right column, or the product links to the left, for more information on the types of products included in section activities.

Technical Activities

Standards play a vital part in the design, production, and distribution of products destined for both national and international com­merce. Sound technical standards benefit the user, as well as the manufacturer, by improving safety, bringing about economies in product, eliminating misunderstandings between manufacturer and purchaser, and assisting the pur­chaser in selecting and obtaining the proper product for his particular need.

NEMA devotes much of its time, effort, and resources to voluntary standardization activities. NEMA standards are offered and recommended to become American National Standards under the procedures of the American National Standards Institute, usually under the canvass method. This decision rests with the particular subdivision or subdivisions concerned. NEMA standards are also often submitted for consideration as IEC standards components or references. It is the intent of the association to continue its support of these, and many more, activities as the best method to continue providing sound and safe electrical products for the use of all.

Government Relations

Through NEMA, the section develops industry positions on legislative and regulatory initiatives that may affect member products, markets, and customers. NEMA's work has resulted in contributions to public policy development and in promoting competitiveness, technological progress, and public safety. On the Government Affairs homepage members can search for and e-mail federal representatives to convey opinions regarding energy policy or other issues related to the electroindustry.

NEMA Government Affairs provides specific services to its members and information in the areas of Environmental Stewardship; Energy; and International Trade & Commerce.

Key activities include:

  • Premium Transformers
  • Involvement in Department of Energy (DoE) considerations on transformer efficiency ratings:

Appliances & Commercial Equipment Standards - Transformers:
Appliances & Commercial Equipment Standards - Transformers

Distribution Transformers Notice of Proposed Rulemaking (NOPR):
Distribution Transformers Notice of Proposed Rulemaking

Market Economics

Through NEMA, member companies are able to develop and implement tailored, industry-specific market and statistical programs that benefit participating companies. Reports may include:

  • Product orders and sales
  • Market forecasting
  • Shipments by trading areas
  • Channels of distribution
  • Financial and operating ratios
  • Wages and benefits
  • Foreign trade

The association also conducts economic analyses on the impact of legislation and regulations on member products, and monitors and reports on key industry market indicators. All programs comply with NEMA statistical confidentiality policies. For more information, please see Business & Economy.

Among the many NEMA statistical reports available to members, the Section participates in the following reports:

  • Monthly Dry-Type and Specialty Transformers (500 kVA and Below) Report S-558-A
  • Annual 41-Trade Area Report for Dry-Type and Specialty Transformers (500 kVA and Below) Report S-558-G
  • Monthly Dry-Type and Specialty Transformers Report (Above 500 kVA) S-558-P
  • Monthly Liquid-Immersed Distribution Transformers Report S-590
  • Monthly All Liquid-Immersed Small Power Transformers Report S-592
  • Monthly Liquid Immersed Large Power Transformers Report Below 30,000 kVA S-594-A
  • Monthly Liquid Immersed Large Power Transformers Report Above 30,000 kVA S-594-B

Useful links


Membership in NEMA is open to any firm actively engaged in the manufacture in North America of a product within the NEMA scope and for sale in the open market. Membership of foreign firms is subject to product section policies and NEMA Board of Governors approval.

NEMA operates on a fee-for-service basis. Each product section establishes its projects and activities and approves an annual operating budget.

For more information on joining NEMA or this section, please see the membership center.


Related Manufacturers

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