[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR36.2]

[Page 165-166]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 36--APPROVAL REQUIREMENTS FOR PERMISSIBLE MOBILE DIESEL-POWERED TRANSPORTATION EQUIPMENT--Table of Contents
 
                      Subpart A--General Provisions
 
Sec. 36.2  Definitions.

    The following definitions apply in this part.
    Applicant An individual, partnership, company, corporation, 
association, or

[[Page 166]]

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.
    Certificate 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.
    Component. A piece, part, or fixture of mobile diesel-powered 
transportation equipment that is essential to its operation as a 
permissible assembly.
    Diesel engine. A compression-ignition, internal-combustion engine 
that utilizes diesel fuel.
    Explosion 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.
    Flame arrester. A device so constructed that flame or sparks from 
the diesel engine cannot propagate an explosion of a flammable mixture 
through it.
    Flammable 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.
    Fuel-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.
    MSHA. The United States Department of Labor, Mine Safety and Health 
Administration.
    Mobile diesel-powered transportation equipment. Equipment that is:
    (1) Used for transporting the product being mined or excavated, or 
for transporting materials and supplies used in mining or excavating 
operations;
    (2) Mounted on wheels or crawler treads (tracks); and
    (3) Powered by a diesel engine as the prime mover.
    Normal operation. When each component and the entire assembly of the 
mobile diesel-powered transportation equipment performs the functions 
for which they were designed.
    Permissible. 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.
    Subassembly. A group or combination of components.

[61 FR 55525, Oct. 25, 1996]