[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: 30CFR57.12013] [Page 376] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 57_SAFETY AND HEALTH STANDARDS_UNDERGROUND METAL AND NONMETAL MINES --Table of Contents Subpart K_Electricity Sec. 57.12013 Splices and repairs of power cables. Permanent splices and repairs made in power cables, including the ground conductor where provided, shall be-- (a) Mechanically strong with electrical conductivity as near as possible to that of the original; (b) Insulated to a degree at least equal to that of the original, and sealed to exclude moisture; and, (c) Provided with damage protection as near as possible to that of the original, including good bonding to the outer jacket.