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This ESSENTIAL describes the safety of electrical equipment in explosive atmospheres requirements of Mexico, based on the specific Official Mexican Standards (NOM), which are mandatory technical regulations.
NOM-001-SEDE-2012, Electrical Installations (utilization), is based on the (US) National Fire Protection Association's National Electrical Code, 2011 Edition (NEC).
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NOM-001-SEDE-2012 covers facilities intended for the use of electrical energy in:
a) Industrial, commercial, housing properties, whatever their use, public and private, and at any of the operating voltage levels, including those used for electrical equipment connected by users. Installations in buildings used by utility companies, such as office buildings, warehouses, parking lots, mechanical workshops, and buildings for recreation purposes.
b) Mobile homes, recreational vehicles, floating constructions, fairs, circuses and exhibitions, parking lots, workshops, meeting places, places of health care, agricultural constructions, marinas and docks.
c) All user facilities located outside buildings;
d) Fixed wiring for telecommunications, signalling, control and the like (excluding the internal wiring of devices);
e) The extensions or modifications to the installations, as well as to the parts of existing installations affected by these extensions or modifications.
Electrical equipment is only considered with respect to its selection and application for the corresponding installation.
Electrical equipment in explosive atmospheres is covered by:
CHAPTER 5 - Special Environments
Article 500 Dangerous (classified) areas, classes I, II and III, divisions 1 and 2
Article 501 Class I areas
Article 502 Class II areas
Article 503 Class III areas
Article 504 Intrinsically safe systems
Article 505 Class I areas, zones 0, 1 and 2
Article 506 Locations in zones 20, 21 and 22 for combustible dusts or fibers / flammable suspended particles
Article 510 Specific (classified) dangerous areas
Article 511 Commercial parking lots, motor vehicle service and repair shops
Article 513 Hangars for aircraft
Article 514 Gas stations and service stations
Article 515 Fuel storage plants
Article 516 Application processes by spraying, immersion and coating
Commercial information for packaging, instructions and guarantees of electronic, electrical and household appliances.
In scope of this Official Mexican Standard NOM-024-SCFI-2013 (acc. to its classification)
4. Classification
Electronic, electrical and household appliances are classified into:
- Dangerous products by design,
- Products dangerous by use, and
- Products for hazardous places.
4.3 The following are products for hazardous places:
Those to be used in places where special conditions prevail, such as the presence of explosive atmospheres (explosive gases or vapors or combustible dusts).
5. Commercial information
The information contained in the packaging or containers of electrical, electronic and household appliances subject to this Official Mexican Standard must be truthful, described and presented in such a way that it does not mislead the consumer with respect to the nature and characteristics of the product.
5.1 The products subject to this Official Mexican Standard must have printed or labeled affixed to the packaging or container, in a clear and legible manner, at least, the following information in Spanish:
(a) The graphic representation or name of the product, unless obvious;
(b) Name, name or business name and address of the national manufacturer or importer;
c) The legend identifying the country of origin of the same (example: "Made in... ", "Manufactured in... ", or other similar ones),
(d) The nominal electrical characteristics applicable to the device, as determined by the manufacturer, such as:
- Supply voltage, in volts.
- Power consumption, in watts or current consumption, in amperes.
- Frequency, in Hertz.
Those products that are marketed as systems (set of several units and that due to their connection configuration cannot be operated independently), must indicate at least the nominal electrical characteristics of the one that serves as the main unit, as determined by the manufacturer.
HINT: A new draft of this standard has been published:
PROY-NOM-024-SE-2022 (will replace the 2013 version)
COMMERCIAL INFORMATION FOR PACKAGING, INSTRUCTIONS AND WARRANTIES OF ELECTRONIC, ELECTRICAL AND APPLIANCE PRODUCTS (CANCELS NOM-024-SCFI-2013, PUBLISHED IN THE OFFICIAL GAZETTE OF THE FEDERATION ON AUGUST 12, 2013)
Quality Infrastructure Law
SIXTH TITLE - CONFORMITY ASSESSMENT
Article 64. When a good, product, process or service must comply with a certain Official Mexican Standard or the Standards referred to therein, its similar ones to be imported must also comply with the specifications established therein, under the terms provided in the Foreign Trade Law.
For this purpose, the standardizing authorities will determine, depending on the level of risk, which products subject to official Mexican standards must demonstrate their compliance at the point of entry into the country, which will be identified in the Foreign Trade Rules through the tariff fractions. corresponding.
In this case, when national goods, products, processes and services are required to do so, the goods, products, processes and services to be imported must also have evidence of compliance with the Official Mexican Standard in accordance with the Evaluation Procedure of the Applicable conformity, such as certificates, opinions or test results from an accredited and approved Conformity Assessment Body or from a foreign third party in terms of a mutual recognition or equivalence agreement in force, in accordance with the provisions of the Regulation.
The Regulations of this Law may provide that the Standardization Authority establish alternatives to the form of compliance with the Conformity Assessment procedures in the case of goods, products, processes and services to be imported, provided that the legitimate objectives of public interest are protected. that protects the Official Mexican Standard in question.
Article 67. The Conformity Assessment Bodies may subcontract the services of a third party to carry out tests or inspections in relation to the Conformity Assessment, provided that these third parties are other Accredited and Approved Conformity Assessment Bodies in the matter, or homologous entities, with equivalent accreditations or approvals, from other countries with which the United States of Mexico has entered into international treaties on the matter. In any case, the Conformity Assessment Body that has subcontracted to a third party will be responsible for the acts of that third party and must notify the standardization authority of said subcontracting.
Article 68. The competent authorities must recognize the results of the Conformity Assessment carried out by the Conformity Assessment Bodies. When said authorities find any discrepancy or error in the results, they must notify the competent Standardization Authority, so that it instructs the respective Conformity Assessment Body to correct the discrepancy or error at no cost to the individual, and without prejudice to sanctions. that correspond to it
The Mexican Federal Regulation for Occupational Health, Safety and Environment (RFSHMAT 2014)
Defines in Article 3:
XV) Conformity Assessment: The determination of the degree of compliance with the Standards
XX) Standard: The official Mexican standard or standards for Safety and Health at Work issued by the Secretariat, in accordance with the provisions of the Federal Law on Metrology and Standardization and its regulations; (Note: Mexican NOM Standards)
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