[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: 30CFR7.65]

[Page 27]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 7--TESTING BY APPLICANT OR THIRD PARTY--Table of Contents
 
                 Subpart D--Multiple-Shot Blasting Units
 
Sec. 7.65  Critical characteristics.

    The following critical characteristics shall be inspected or tested 
on each blasting unit to which an approval marking is affixed:
    (a) The output current.
    (b) The voltage cut-off time.
    (c) The components that control voltage and current through each 
making and breaking electric contact.
    (d) Operation of the visual indicator and the firing switch.