[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: 30CFR75.801]



[Page 536]

 

                       TITLE 30--MINERAL RESOURCES

 

  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR

 

PART 75_MANDATORY SAFETY STANDARDS_UNDERGROUND COAL MINES--Table of 

Contents

 

             Subpart I_Underground High-Voltage Distribution

 

Sec.  75.801  Grounding resistors.



                         [Statutory Provisions]



    The grounding resistor, where required, shall be of the proper ohmic 

value to limit the voltage drop in the grounding circuit external to the 

resistor to not more than 100 volts under fault conditions. The 

grounding resistor shall be rated for maximum fault current continuously 

and insulated from ground for a voltage equal to the phase-to-phase 

voltage of the system.