[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 646]
 
                       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 I_Surface High-Voltage Distribution
 
Sec.  77.800  High-voltage circuits; circuit breakers.


    High-voltage circuits supplying power to portable or mobile 
equipment shall be protected by suitable circuit breakers of adequate 
interrupting capacity which are properly tested and maintained and 
equipped with devices to provide protection against under voltage, 
grounded phase, short circuit and overcurrent. High-voltage circuits 
supplying power to stationary equipment shall be protected against 
overloads by either a circuit breaker or fuses of the correct type and 
capacity.