[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. 77.801-1 Grounding resistors; continuous current rating. The ground fault current rating of grounding resistors shall meet the ``extended time rating'' set forth in American Institute of Electrical Engineers, Standard No. 32.