[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: 30CFR18.30]

[Page 95-96]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 18--ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES--Table of Contents
 
             Subpart B--Construction and Design Requirements
 
Sec. 18.30  Windows and lenses.

    (a) MSHA may waive testing of materials for windows or lenses except 
headlight lenses. When tested, material for windows or lenses shall meet 
the test requirements prescribed in Sec. 18.66 and shall be sealed in 
place or provided

[[Page 96]]

with flange joints in accordance with Sec. 18.31.
    (b) Windows or lenses shall be protected from mechanical damage by 
structural design, location, or guarding. Windows or lenses, other than 
headlight lenses, having an exposed area greater than 8 square inches, 
shall be provided with guarding or equivalent.