Product certifications based on Mexican Official Standards (NOM) and Mexican Standards (NMX)

UL is an independent organization with more than a century of experience in product safety and compliance evaluation, among which are product certifications based on Mexican Official Standards (Normas Oficiales Mexicanas – NOM) and Mexican Standards Mexican standards (Normas Mexicanas – NMX).

Conformity assessment determines the compliance degree with NOM, NMX and international standards. Also included, are other specifications, prescriptions, or features comprising product samples, tests, certification and surveillance (follow-up).

The decision to grant, maintain, extend, suspend, cancel or refuse a certification to a product is made based on sustainable technical foundations, the information gathered during the compliance evaluation process, results obtained during surveillance (follow-up) visits, and other relevant data.

The corresponding procedures to grant, keep, extend, suspend, cancel or refuse a certification are available prior to ISSUING a written application to UL de México, S.A. de C.V. NOM program owner. These procedures cannot be reproduced and upon request a consultation will be performed by UL personnel.

In August 2010,the Ministry of Economy published an executive order that recognized the equivalence of certain U.S. and Canadian issued certifications with those issued in accordance to the Mexican Official Standards by Mexican certification organizations.

Learn more about this order and UL’s response (Spanish content).


The following product categories all require mandatory certification:

  • Information technology equipment
  • Consumer electronics
  • Lighting products
  • Medical devices (NOM Mark)
  • Wire and cable
  • Industrial control equipment


The product certification process:

An overview of the scope and process steps involved to gain NOM certification

    1. Scope
      1. Accredited standards
      2. Certification Schemes
      3. General considerations for NOM Certification
      4. Required documentation and available forms – Overview
    2. Submitting a product to evaluation under Schemes I and V:
      1. Required documentation and available forms
      2. Criteria for product family grouping
    3. Submitting a product to evaluation under Schemes II, III, VI, VII, and VIII:
      1. Required documentation and available forms
      2. Criteria for product family grouping
    4. Surveillance Process for NOM Certification Program

Your contact at UL can talk you through the surveillance or follow-up process. Alternatively, contact us for further information

  1. Other certification processes include:
    1. Issuing a highly specialized equipment dictum
    2. Ownership extension
    3. Changes to certificate scope or issued dictum
    4. Validation letters for custom samples
    5. Product dictum
    6. Required documentation

    Contact us for step-by-step guidance on these items in relation to your product.

  2. Certification surveillance (follow-up), suspension, and cancellation processes


Other important information:

  1. Legal frame
  2. Information on Energy Eficiency
    1. Standards
      1. NOM-001-SCFI-1993 scope of application
      2. NOM-016-SCFI-1993 scope of application
      3. NOM-019-SCFI-1998 scope of application
      4. NOM-003-SCFI-2000 scope of application
      5. NOM-058-SCFI-1999 scope of application
      6. NOM-032-ENER-2013 scope of application



For information on design and usage of the NOM mark, refer to our NOM Mark usage page, our our corporate pages on the UL-MX NOM Mark, including guidelines on promotion and advertising.


The Foundations of Conformity Assessment systems used in Mexico.
Read more on Legal frame.