[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 649]
 
                       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 J_Low- and Medium-Voltage Alternating Current Circuits
 
Sec.  77.902-1  Fail safe ground check circuits; maximum voltage.

    The maximum voltage used for ground check circuits under Sec.  
77.902 shall not exceed 40 volts.