[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR111.05-21] [Page 215] TITLE 46_SHIPPING (This book contains parts 90 to 139) CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 111_ELECTRIC SYSTEMS_GENERAL REQUIREMENTS--Table of Contents Subpart 111.05_Equipment Ground, Ground Detection, and Grounded Systems Sec. 111.05-21 Ground detection. There must be ground detection for each: (a) Electric propulsion system; (b) Ship's service power system; (c) Lighting system; and (d) Power or lighting distribution system that is isolated from the ship's service power and lighting system by transformers, motor generator sets, or other devices. [[Page 216]]