This Technical Regulation of the Customs Union sets out the requirements to equipment intended for use in explosive atmospheres, the compliance with which provides its safe use in explosive atmospheres.

Depending on the special measures applied to prevent ignition of the surrounding explosive atmosphere one type or combination of several types of explosion protection may be applied to:

1) electrical equipment intended for use in explosive gas atmospheres:

"d" - flameproof enclosure;

"e" - increased safety;

"i" ("ia" , "ib", "ic") - intrinsic safety (intrinsically safe electric circuit);

"m" ("ma", "mb", "mc") - encapsulation by compound;

"nA" - нnon-sparking equipment;

"nC"- enclosed-break devices, hermetically-sealed device or non-incendive components producing arcs, sparks or hot surfaces;

"nR"- restricted-breathing enclosure;

"nL"- energy-limited apparatus;

"nZ"- pressurized enclosure;

"o" - oil immersion;

"p" ("px", "py", "pz") - pressurization;

"q" - powder filling;

"s" - special protection;

2) electrical equipment intended for use in explosive dust atmospheres:

"t" ("ta", "tb", "tc") - protection by enclosure;

"i" ("ia", "ib") - intrinsic safety (intrinsically safe electric circuit);

"m" ("ma", "mb", "mc") - encapsulation by compound;

"p" - pressurization;

"s" - special protection;

3) non-electrical equipment intended for use in explosive atmospheres:

"c" - protection by constructional safety;

"b" - protection by control of ignition source;

"k" - protection by liquid immersion;

"d" - protection by flameproof enclosure;

"fr" -protection by flow restricting enclosure;

"p" - pressurization;

4) other recognized types of explosion protection.

Manufacturer (person authorized by the manufacturer), importer submits to the certification (conformity (confirmation) assessment) body a set of the documents for equipment to confirm compliance of equipment with explosion safety requirements of this Technical Regulation of the Customs Union, including:

• application for certification;
• copies of representative’s constitutive documents (Certificate of registration, extract from the Unified State Register of Legal Persons (ЕГРЮЛ in Russian) and the Main State Registration Number (ОГРН in Russian);
• a copy of the agreement on assignation of powers between the manufacturer and manufacturer's authorized representative;
• technical specification (if available);
• operating documents;
• list of standards equipment complies to from the List of standards specified in cl.1 of Article 5 of this Technical Regulation of the Customs Union (if used by the manufacturer);
• explanatory note with description of the used engineering solutions and risk assessment, confirming the fulfillment of explosion safety requirements of this Technical Regulation of the Customs Union, if the standards do not exist or do not apply;
• certificate of conformity of the manufacturer’s quality management system (if available);
• contract (supply agreement) or shipping documentation (for the batch of equipment).

The main typical certification schemes are the following::

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The applicant under certification scheme 1c, 3c, 4c can be a legal or an individual person as an individual entrepreneur or a manufacturer, or functioning as a foreign manufacturer on the basis of the contract with him as regards to ensuring compliance of the supplied products to the requirements of this Technical Regulation and bearing responsibility for non-compliance of the supplied products to the requirements of this Technical Regulation of the Customs Union (person, functioning as a foreign manufacturer), registered on the territory of the Member State in accordance with the law of the Member State of the Customs Union.