G/TBT/N/MEX/355  
21 March  2017 
(17-1552) Page: 1/3 
Committee on Technical Barriers to Trade  Original:  Spanish  
 
  NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6.  
 
1. Notifying Member : MEXICO  
If applicable, name of local government involved (Articles 3.2 and 7.2):   
2. Agency responsible : Comisión Reguladora de Energía  (Ener gy Regulatory Commission)  
Name and address (including telephone and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:  
Horacio No. 1750 
11510 CIUDAD DE MEXICO  
DISTRITO FEDERAL  
+525552831515  
3. Notified under Article 2.9.2 [ ], 2.10.1 [X], 5.6.2 [ ], 5.7.1 [ ], other:   
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading . ICS numbers may be provided  in addition, where applicable) : Equipment 
to block mobile phone signals, radiocommunications and the transmission of images and 
other data (heading 85.17)  
5. Title, number of pages and language(s) of the notified document : Acuerdo de la 
Comisión Regulado ra de Energía que Expide la Norma Oficial Mexicana de Emergencia 
"NOM -EM-007-CRE-2017, Sistemas de Medición de Energía Eléctrica . Especificaciones y 
Métodos de Prueba para Medidores Multifunción y Transformadores de Instrumento " 
(Decision of the Energy Reg ulatory Commission issuing Emergency Mexican Official 
Standard NOM -EM-007-CRE-2017 "Electrical power measurement systems . Specifications 
and test methods for multifunction meters and instrument transformers") (593 pages, in 
Spanish)  
6. Description of cont ent: There is a risk that the activity of the Wholesale Electricity 
Market (MEM) and the operation of the electricity industry may be affected . The issue 
concerns a financial risk for participants in the MEM, which is linked to the costs that could 
be incu rred by the underestimation or overestimation of electricity consumption and 
related services.  This risk, which is associated with a lack of legal certainty in the activities 
carried out by transporters and distributors of electricity, may have adverse eff ects on the 
domestic economy (such as high entry costs), competition, and free market participation.  
On the basis of the above, and in accordance with the provisions of Section IV of Article 40 
of the Federal Metrology and Standardization Law (LFMN), there  is a need for a Mexican 
Official Standard (NOM) establishing the characteristics of and the minimum specifications 
for measuring instruments and related systems . This Mexican Official Standard is also 
necessary to determine the test methods , with the para meters used on the MEM, which 
should be applied to all power stations and distribution centres that use multifunction 
meters.  G/TBT/N/MEX/355  
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  7. Objective and rationale, including the nature of urgent problems where 
applicable : The notified Emergency Mexican Official Sta ndard establishes the 
specifications and test methods for metrological instruments used in the electrical power 
measurement systems defined in section 5 of the text.  
8. Relevant documents:  
 NOM-001-SEDE -2012, Instalaciones eléctricas (utilización)  (Mexican  Official 
Standard NOM -001-SEDE -2012, Electrical installations (use));  
 NMX-Z-12/1-1987: Muestreo para la inspección por atributos - Parte 1 : 
Información general y aplicaciones  (Mexican Standard NMX -Z-12/1-1987: 
Sampling for inspection by attributes . Part 1: General information and application);  
 NMX-J-109-ANCE -2010, Transformadores de corriente - especificaciones y 
métodos de prueba (Mexican Standard NMX -J-109-ANCE -2010: Current 
transformers - Specifications and test methods) (cancels Mexican Standard NMX -J-
109-1977);  
 NMX-J-550/4 -15-ANCE -2005, Compatibilidad electromagnética (EMC) - parte 4 -15: 
técnicas de prueba y medición - medidor de parpadeo - especificaciones de 
funcionamiento y diseño  (Mexican Standard NMX -J-550/4 -15-ANCE -2005: 
Electromagnetic compatibi lity (EMC) - Part 4 -15: Testing and measurement 
techniques - Flicker meter - Performance specifications and design);  
 NMX-J-610/4 -7-ANCE -2013, Compatibilidad electromagnética (EMC) - parte 4 -7: 
técnicas de prueba y medición - guía general de instrumentación  y medición para 
armónicas e interarmónicas, en sistemas de suministro de energía eléctrica y 
equipo que se conecta a estos  (Mexican Standard NMX -J-610/4 -7-ANCE -2013: 
Electromagnetic compatibility (EMC) - Part 4 -7: Testing and measurement 
techniques - General guide on harmonics and interharmonics measurements and 
instrumentation, for power  supply systems and equipment connected thereto) 
(cancels Mexican Standard NMX -J-550/4 -7-ANCE -2005);  
 NMX-J-610/4 -30-ANCE -2014, Compatibilidad electromagnética (EMC) - parte 4-30: 
técnicas de prueba y medición - métodos de medición y estudio de Calidad de la 
energía eléctrica (Mexican Standard NMX -J-610/4 -30-ANCE -2014: Electromagnetic 
compatibility (EMC) - Part 4 -30: Testing and measurement techniques - Methods 
to measure th e quality of electrical power) (cancels Mexican Standard NMX -J-
610/4 -30-ANCE -2011);  
 NMX-J-615/1 -ANCE -2009, Transformadores de medida - parte 1 : requisitos 
generales (Mexican Standard NMX -J-615/1 -ANCE -2009: Measuring transformers - 
Part 1 : General requireme nts); 
 NMX-J-615/3 -ANCE -2013, Transformadores de medida - parte 3 : requisitos 
adicionales para transformadores de potencial inductivo  (Mexican Standard NMX -J-
615/3 -ANCE -2013: Measuring transformers - Part 3 : Additional requirements for 
inductive potential t ransformers);  
 NMX-J-615/5 -ANCE -2014, Transformadores de medida - parte 5 : requisitos 
adicionales para transformadores de potencial capacitivo (Mexican Standard NMX -
J-615/5 -ANCE -2014: Measuring transformers - Part 5 : Additional requirements for 
capacitive p otential transformers);  
 NMX-J-674/22 -ANCE -2013, Equipo de medición de electricidad (C . A.) - requisitos 
particulares - parte 22 : medidores estáticos para energía activa  (clases 0.2 S y 0.5 
S) (Electricity metering equipment (AC) - Particular requirements - Part 22 : Static 
meters for active energy (classes 0.2 and 0.5)).  
9. Proposed date of adoption : - 
Proposed date of entry into force : This Emergency Mexican Official Standard will enter 
into force the day after its publication in the Official Journal and w ill remain in force for a 
period of six months.  
10. Final date for comments : Not applicable.  G/TBT/N/MEX/355  
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  11. Texts available from : National enquiry point [X] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:  
Secreta ría de Economía  
Subsecretaría de Competitividad y Normatividad  
Dirección General de Normas  
Tel.: (+52) 55 5729 9100, Ext. 43244  
Fax: (+52) 55 5520 9715  
Website : http://www.economia.gob.mx/comunidad -negocios/normalizacion/catalogo -
mexicano -de-normas  
Email: normasomc@economia.gob.mx  and sofia.pacheco@economia.gob.mx  
Available online at:  
http://www.dof.gob.mx/nota_detalle.php?codigo=5476075&fecha=13/03/2017  
https://members.wto.org/crnattachments/2017/TBT/MEX/17_1325_00_s.pd f