[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR77]

[Page 640]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 77_MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK 
AREAS OF UNDERGROUND COAL MINES--Table of Contents
 
                 Subpart F_Electrical Equipment_General
 
Sec.  77.501  Electric distribution circuits and equipment; repair.

    No electrical work shall be performed on electric distribution 
circuits or equipment, except by a qualified person or by a person 
trained to perform electrical work and to maintain electrical equipment 
under the direct supervision of a qualified person. Disconnecting 
devices shall be locked out and suitably tagged by the persons who 
perform such work, except that in cases where locking out is not 
possible, such devices shall be opened and suitably tagged by such 
persons. Locks or tags shall be removed only by the persons who 
installed them or, if such persons are unavailable, by persons 
authorized by the operator or his agent.