{"data":{"id":"us/30-cfr-36.2","jurisdiction":"us","citation":"30 CFR 36.2","heading":"Definitions.","body":"The following definitions apply in this part.\nApplicant An individual, partnership, company, corporation, association, or other organization, that designs, manufactures, assembles, or controls the assembly and that seeks a certificate of approval or preliminary testing of mobile diesel-powered transportation equipment as permissible.\nCertificate of approval. A formal document issued by MSHA stating that the complete assembly has met the requirements of this part for mobile diesel-powered transportation equipment and authorizing the use and attachment of an official approval plate so indicating.\nComponent. A piece, part, or fixture of mobile diesel-powered transportation equipment that is essential to its operation as a permissible assembly.\nDiesel engine. A compression-ignition, internal-combustion engine that utilizes diesel fuel.\nExplosion proof. A component or subassembly that is so constructed and protected by an enclosure and/or flame arrester (s) that if a flammable mixture of gas is ignited within the enclosure it will withstand the resultant pressure without damage to the enclosure and/or flame arrester(s). Also the enclosure and/or flame arrester(s) shall prevent the discharge of flame or ignition of any flammable mixture that surrounds the enclosure.\nFlame arrester. A device so constructed that flame or sparks from the diesel engine cannot propagate an explosion of a flammable mixture through it.\nFlammable mixture. A mixture of gas, such as methane, natural gas, or similar hydrocarbon gas with normal air, that will propagate flame or explode violently when initiated by an incendive source.\nFuel-air ratio. The composition of the mixture of fuel and air in the combustion chamber of the diesel engine expressed as weight-pound of fuel per pound of air.\nMSHA. The United States Department of Labor, Mine Safety and Health Administration.\nMobile diesel-powered transportation equipment. Equipment that is:\n(1) Used for transporting the product being mined or excavated, or for transporting materials and supplies used in mining or excavating operations;\n(2) Mounted on wheels or crawler treads (tracks); and\n(3) Powered by a diesel engine as the prime mover.\nNormal operation. When each component and the entire assembly of the mobile diesel-powered transportation equipment performs the functions for which they were designed.\nPermissible. As applied to mobile diesel-powered transportation equipment, this means that the complete assembly conforms to the requirements of this part, and that a certificate of approval to that effect has been issued.\nSubassembly. A group or combination of components.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","PART 36—APPROVAL REQUIREMENTS FOR PERMISSIBLE MOBILE DIESEL-POWERED TRANSPORTATION EQUIPMENT","Subpart A—General Provisions"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"510fde1b4ec205eac887058e7187f3fb3c8c69042059caec1a6ce37437acbe67","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-36.1","next":"us/30-cfr-36.3"},"notice":"GroundRules: Original legal text. Not legal advice."}