[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: 30CFR33.20]

[Page 156]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 33--DUST COLLECTORS FOR USE IN CONNECTION WITH ROCK DRILLING IN COAL MINES--Table of Contents
 
                 Subpart B--Dust-Collector Requirements
 
Sec. 33.20  Design and construction.


    (a) MSHA will not test or investigate any dust collector that in its 
opinion is not constructed of suitable materials, that evidences faulty 
workmanship, or that is not designed upon sound engineering principles. 
Since all possible designs, arrangements, or combinations of components 
and materials cannot be foreseen, MSHA reserves the right to modify the 
tests specified in this part in such manner to obtain substantially the 
same information and degree of protection as provided by the tests 
described in Subpart C of this part.
    (b) Adequacy of design and construction of a unit or system will be 
determined in accordance with its ability (1) to prevent the 
dissemination of objectionable or harmful concentrations of dust into a 
mine atmosphere, and (2) to protect against explosion and/or fire 
hazards of electrical equipment, except as provided in Sec. 33.38(b).