CRE modifies transitional articles of NOM-001-CRE/SCFI-2019

January 2023 | printable version

Executive Summary

• On January 13, 2023, the Energy Regulatory Commission published the Agreement modifying the transitional articles of the Mexican Official Standard NOM-001-CRE/SCFI-2019, Electric energy measurement systems - Meters and measurement transformers - Metrological specifications, test methods and procedure for conformity assessment.
• The NOM specifies the period that manufacturers, Transporters and Distributors have for the installation of meters and measurement transformers.
• It is important to remember that Transporters and Distributors must only use and install measuring instruments that have obtained a model or prototype approval in accordance with the provisions of the Federal Law on Metrology and Standardization and the corresponding Mexican Official Standard. 
• The Agreement entered into force on 16 January 2023.

On January 13, 2023, the Energy Regulatory Commission (“CRE”) published on the portal of the Official Gazette of the Federation (“DOF”), the Agreement that modifies the transitional articles of the Mexican Official Standard NOM-001-CRE/SCFI-2019 (“NOM”), Electric energy measurement systems - Meters and measurement transformers - Metrological specifications, test methods and procedure for conformity assessment (“Agreement”)¹.

Through this Agreement, the Second and Fifth Transitory Articles of the NOM were eliminated, which implies that the date of entry into force of the NOM changes, and instead of entering into force 365 days after its publication, it will enter into force the day after its publication, anticipating the assumptions that the measuring equipment must comply with as of January 2025.

In addition, this Agreement specifies the period of time that manufacturers, Transporters and² and the Distributors³ for the installation of meters and measuring transformers.

It should be noted that Article 113 of the Regulations of the Electric Industry Law (“RLIE”) states that Transporters and Distributors must only use and install measuring instruments that have obtained a model or prototype approval in accordance with the provisions of the Federal Law on Metrology and Standardization and the corresponding Mexican official standard. They must also verify, through the then called accredited and approved verification units —now inspection units in accordance with the Electric Industry Law—, at least once every three years, the installed measuring instruments to ensure that they comply with the established accuracy.

Through the Agreement, the CRE makes the following modifications to the transitional articles of the NOM:

• Meters and measuring transformers that do not have model or prototype approval and the certificate of compliance with the NOM may be purchased, marketed and used until January 1, 2025. On the other hand, meters and measuring transformers that have model or prototype approval and the certificate of compliance prior to January 1, 2025 may be purchased, marketed and used at any time.
• Meters and measuring transformers, which must comply with the NOM, must be installed starting January 1, 2025. However, equipment that Transporters and Distributors prove to have acquired prior to January 1, 2025 may be installed and used during its useful life, as long as it maintains the metrological characteristics with which it was originally acquired.
• Distributors must ensure that meters installed before January 1, 2025 for active and reactive energy measurements of medium voltage services with loads greater than or equal to 100 kW comply with the following accuracy values ​​within a maximum period of 60 months from the entry into force of the NOM:

• Transporters must ensure that meters installed prior to January 1, 2025, for active and reactive energy measurements of high voltage services comply with the following accuracy values ​​within a maximum period of 60 months from the entry into force of the NOM:

• Test reports prior to 1 January 2025 may be used for certification purposes, subject to technical review and validation of the results by a Certification Body.
• Test reports issued prior to 1 January 2025 may be used for the purposes of approving the model or prototype, subject to technical review and validation by the National Metrology Centre.
• Testing Laboratories, Certification Bodies and Inspection Units may now begin the process of accreditation and approval of the NOM.

The Agreement entered into force on 16 January 2023. To consult the original publication, please visit: https://www.dof.gob.mx/nota_detalle.php?codigo=5676875&fecha=13/01/2023#gsc.tab=0

¹ The Agreement is available for consultation at: https://www.dof.gob.mx/nota_detalle.php?codigo=5676875&fecha=13/01/2023#gsc.tab=0
² CFE Transmission.
³ CFE Distribution.