[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: 30CFR27.37]

[Page 146]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 27--METHANE-MONITORING SYSTEMS--Table of Contents
 
                      Subpart C--Test Requirements
 
Sec. 27.37  Tests to determine adequacy of safety devices for bulbs.

    The glass envelope of bulbs with the filament incandescent at normal 
operating voltage shall be broken in flammable methane-air or natural 
gas-air mixtures in a gallery to determine that the safety device will 
prevent ignition of the flammable mixtures.