[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: 46CFR111.05-31] [Page 216] 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. 111.05-31 Grounding conductors for systems. (a) A conductor for grounding a direct-current system must be the larger of: (1) The largest conductor supplying the system; or (2) No. 8 AWG (8.4mm\2\). (b) A conductor for grounding the neutral of an alternating-current system must meet Table 111.05-31(b). Table 111.05-31(b)--Neutral Grounding Conductor for Alternating-Current System ------------------------------------------------------------------------ Size of the largest generator cable or equivalent for parallel generators--AWG-MCM (mm\2\) Size of the system -------------------------------------------------- grounding conductor-- Less than or AWG(mm\2\) Greater than equal to ------------------------------------------------------------------------ 2 (33.6)......... 8 (8.4) 2 (33.6)...................... 0 (53.5)......... 6 (13.3) 0 (53.5)...................... 3/0 (85.0)....... 4 (21.2) 3/0 (85.0).................... 350 MCM (177).... 2 (33.6) 350 MCM (177)................. 600 MCM (304).... 0 (53.5) 600 MCM (304)................. 1100 MCM (557)... 2/0 (67.5) 1100 MCM (557)................ ................. 3/0 (85.0) ------------------------------------------------------------------------