S9086-KC-STM-010 REVISION 9 NAVAL SHIPS’ TECHNICAL MANUAL CHAPTER 300 ELECTRIC PLANT - GENERAL SUPERSEDURE NOTICE: THIS MANUAL SUPERSEDES S9086-KC-STM-010, REVISION 8 DATED 1 FEB 2012 AND ALL CHANGES THERETO. DISTRIBUTION STATEMENT C: DISTRIBUTION AUTHORIZED TO U.S. GOVERNMENT AGENCIES AND THEIR CONTRACTORS; ADMINISTRATIVE OR OPERATIONAL USE; 11 MARCH 1997. OTHER REQUESTS FOR THIS DOCUMENT SHALL BE REFERRED TO NSWC, PHILADELPHIA CODE 944. WARNING: THIS DOCUMENT CONTAINS TECHNICAL DATA WHOSE EXPORT IS RESTRICTED BY THE ARMS EXPORT CONTROL ACT (TITLE 22, U.S.C. SEC 2751, ET SEQ.) OR THE EXPORT ADMINISTRATION ACT OF 1979, AS AMENDED, TITLE 50, U.S.C., APP 2401 ET SEQ. VIOLATIONS OF THESE EXPORT LAWS ARE SUBJECT TO SEVERE CRIMINAL PENALTIES. DISSEMINATE IN ACCORDANCE WITH PROVISIONS OF DOD DIRECTIVE 5230.25(D). DESTRUCTION NOTICE: DESTROY BY ANY METHOD THAT WILL PREVENT DISCLOSURE OF CONTENTS OR RECONSTRUCTION OF THIS DOCUMENT. PUBLISHED BY DIRECTION OF COMMANDER, NAVAL SEA SYSTEMS COMMAND *0910LP1123525* TITLE-1 / (TITLE-2 Blank)@@FIpgtype@@TITLE@@!FIpgtype@@1 MAY 2012 @@FIpgtype@@TITLE@@!FIpgtype@@ TITLE-2 @@FIpgtype@@BLANK@@!FIpgtype@@ S9086-KC-STM-010 RECORD OF REVISIONS REV NO. DATE TITLE AND/OR BRIEF DESCRIPTION/PREPARING ACTIVITY ORG N/A ORIGINAL PUBLICATION DATE NOT AVAILABLE 1 N/A REVISION 1 WAS NEVER ISSUED 2 28 FEB 1991 REVISION 2 PUBLICATION UPDATED DISTRIBUTION STATEMENT 3 01 FEB 1996 REVISION 2 PUBLICATION UPDATED DISTRIBUTION STATEMENT 4 11 MAR 1997 REVISION 4 PUBLICATION UPDATED DISTRIBUTION STATEMENT 5 31 DEC 2000 REVISION 5 PUBLICATION 6 31 JUL 2003 REVISION 6 PUBLICATION 7 01 APR 2005 REVISION 7 PUBLICATION 8 1 FEB 2012 NSTM CHAPTER 300 HAS BEEN COMPLETELY REVISED; NO CHANGE BARS WERE USED. TMDERS/ACNS INCORPORATED OR NO LOMGER APPLY: N39040-09-0216, N40025-07-CB03, N4523A-05-0002, N63393-06- 0001, N65540-06-DU07, N65540-06-DU08, N65540-07-DU01, N65540-09-A002, N65540-09-S177, N65540-10-JC39, Q90613-07- TB12, Q90613-09-JT01, R20832-08-0001, Z14501-07-SS01 9 1 MAY 2012 THIS REVISION CORRECTS AN ERROR ON TABLE 300-2-1B AND VARIOUS OTHER CHANGES. TMDERS/ACNS INCORPORATED: N65540-12-SA00 ACN 1/R8. PARAGRAPH(S) 300-2.7.4, 300-3.3.3.1.1, 300-3.3.3.2 AND 300-I.1.5 TABLE(S) 300-2-1B, 300-2-2, 300-3-5, 300-I-1 AND 300-I-2 FIGURE(S) 300-3-4 FOR OPTIMAL VIEWING OF THIS TECHNICAL MANUAL THE PAGE LAYOUT IN ADOBE ACROBAT READER SHOULD BE SINGLE PAGE. CONTINUOUS PAGE DISPLAY CAN CAUSE PROBLEMS WITH LINK REFERENCES AND THE BOOKMARKS. RECORD OF REVISIONS-1 / (RECORD OF REVISIONS-2 Blank) RECORD OF REVISIONS-2 @@FIpgtype@@BLANK@@!FIpgtype@@ S9086-KC-STM-010 FOREWORD This technical manual provides description, identification, control, and component information for the Electric Plant. This technical manual is intended for guidance of and use by personnel operating and maintain- ing the equipment described herein. This manual consists of one chapter and nine appendices as follows: Chapter 300 - Electric Plant General Section 1 - Sources of Information Section 2 - Electrical Safety Precautions Section 3 - Electrical Insulation Section 4 - Maintenance of Electrical Equipment Section 5 - Reconditioning Electrical Equipment after Contamination by Seawater, Oil, Carbon Dust, or a Combination of these Materials Appendix A - Electrical Insulating Materials Appendix B - Certification Procedure for Providing Motors with a Sealed Insulations System Appendix C - Certification Procedures for Refurbishment of Submarine Ship Service/400 Hz Motor- Generator Sets Appendix D - Banding Armatures with Resin-Treated Fibrous-Glass Banding Tape Appendix E - Trickle Method of Shipboard Motor Repair Appendix F - Quality Assurance Inspection Procedures and Information for Application of Insulating Varnishes to Navy Electrical Equipment Appendix G - Safety Supplement Appendix H - Electrical/Electronic Workbenches Appendix I - PPE, Safety Equipment Ships, training activities, supply points, depots, Naval Shipyards, and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of NAVSEA technical manuals. All errors, omissions, discrepancies, and suggestions for improvement to NAVSEA technical manuals shall be reported to the COMMANDER CODE 310 TMDERs NAVSURFWARCENDIV NSDSA 4363 MISSILE WAY BLDG 1389 Port Hueneme, CA 93043-4307 on NAVSEA/ SPAWAR Technical Manual Deficiency/Evaluation Report (TMDER), NAVSEA Form 4160/1. To facilitate such reporting, print, complete, and mail NAVSEA Form 4160/1 at end of TM or submit TMDERS at web site http://nsdsa.nmci.navy.mil. All feedback comments shall be thoroughly investigated and originators will be advised of action result- ing therefrom. FOREWORD-1 / (FOREWORD-2 Blank) FOREWORD-2 @@FIpgtype@@BLANK@@!FIpgtype@@ S9086-KC-STM-010 TABLE OF CONTENTS Chapter/Paragraph Page 300 ELECTRICAL PLANT GENERAL .......................... 1-1 SECTION 1 SOURCES OF INFORMATION ............................ 1-1 300-1.1 SCOPE. ........................................... 1-1 300-1.1.1 GENERAL. .................................... 1-1 300-1.2 SOURCES OF INFORMATION. ............................. 1-1 300-1.2.1 CHAPTERS IN THE NAVAL SHIPS’ TECHNICAL MANUAL. ....... 1-1 300-1.2.2 SHIP INFORMATION BOOK. ......................... 1-2 300-1.2.3 TECHNICAL MANUALS. ............................ 1-2 300-1.2.4 DRAWINGS. ................................... 1-2 300-1.2.5 DAMAGE CONTROL BOOK. ......................... 1-3 300-1.2.6 PLANNED MAINTENANCE SYSTEM. .................... 1-3 300-1.2.7 DOCUMENTS AND PUBLICATIONS. .................... 1-3 300-1.2.8 REFERENCES. .................................. 1-5 SECTION 2 ELECTRICAL SAFETY PRECAUTIONS ...................... 2-1 300-2.1 NEED FOR SAFETY PRECAUTIONS. ......................... 2-1 300-2.1.1 GENERAL. .................................... 2-1 300-2.1.1.1 Personal Responsibility. ....................... 2-1 300-2.1.1.2 Contradictory Guidance. ....................... 2-1 300-2.1.1.3 Chapter 300 Overview. ....................... 2-1 300-2.1.2 ELECTRIC HAZARDS. ............................. 2-2 300-2.1.2.1 Electric Shock. ............................ 2-2 300-2.1.2.2 Rescuing an Electric Shock Victim. ................ 2-3 300-2.1.2.3 Arc Flash. .............................. 2-3 300-2.1.2.4 Arc Blast. ............................... 2-3 300-2.1.2.5 Flash Protection Boundaries (FPB). ................ 2-4 300-2.1.3 INDIVIDUAL RESPONSIBILITY. ....................... 2-5 300-2.1.3.1 Principles. .............................. 2-5 300-2.2 SHIPBOARD ELECTRICAL SYSTEMS. ........................ 2-5 300-2.2.1 EQUIPMENT GROUNDING AND SYSTEM GROUNDING. ........ 2-5 300-2.2.1.1 Principles. .............................. 2-5 300-2.2.1.2 Requirements. ............................ 2-5 300-2.2.1.3 System Grounding. ......................... 2-6 300-2.2.1.4 Receptacle Grounding. ....................... 2-6 300-2.2.2 CHARACTERISTICS OF AN UNGROUNDED SYSTEM. ......... 2-7 300-2.2.2.1 Ungrounded System Misconception. ................ 2-7 300-2.2.3 SHIPBOARD UNGROUNDED SYSTEM. ................... 2-7 300-2.2.3.1 Inherent System Resistances to Ground. .............. 2-7 300-2.2.3.2 Inherent System Capacitances to Ground. ............. 2-7 300-2.2.3.3 Electromagnetic Interference (EMI) Filters. ............ 2-8 300-2.2.3.4 High-Resistance Grounding Subsystems (Where Installed). 2-8 i S9086-KC-STM-010 TABLE OF CONTENTS - Continued Chapter/Paragraph Page 300-2.2.3.5 Transient Voltage Surge Suppression Systems (TVSS) (Where Installed). ............................. 2-8 300-2.2.3.6 Arc Fault Detection (AFD) Systems (Where Installed). ..... 2-8 300-2.2.4 ELECTRIC SHOCK FROM SHIPBOARD SYSTEM. ............ 2-9 300-2.2.4.1 Path for Current Flow. ........................ 2-9 300-2.3 ELECTRICAL SAFETY REQUIREMENTS FOR EQUIPMENT MAINTENANCE. .............................................. 2-11 300-2.3.1 EQUIPMENT MAINTENANCE. ........................ 2-11 300-2.3.1.1 Precautions. ............................. 2-11 300-2.3.1.2 Requirements. ............................ 2-12 300-2.3.2 BATTERY WELL ELECTRICAL SAFETY REQUIREMENTS. ....... 2-13 300-2.3.3 EQUIPMENT ISOLATION. ........................... 2-13 300-2.3.3.1 Requirements. ............................ 2-13 300-2.3.3.2 Discussion. .............................. 2-14 300-2.3.4 QUALIFIED WORKER. ............................. 2-16 300-2.3.4.1 Consideration. ............................ 2-16 300-2.3.4.2 Demonstration. ............................ 2-16 300-2.3.4.3 Task Analysis. ............................ 2-16 300-2.3.4.4 Supervisor’s Role. .......................... 2-16 300-2.3.5 WARNING SIGNS. ................................ 2-16 300-2.4 ENERGIZED WORK GENERAL REQUIREMENTS. ................. 2-16 300-2.4.1 ENERGIZED WORK PLANNING. ....................... 2-16 300-2.4.1.1 Principles. .............................. 2-16 300-2.4.1.2 Requirements. ............................ 2-17 300-2.4.2 ENERGIZED WORK REQUIREMENTS. ................... 2-18 300-2.4.3 ENERGIZED WORK - SPECIFIC REQUIREMENTS. ............ 2-19 300-2.4.3.1 Principles. .............................. 2-20 300-2.5 EXCEPTIONS TO ENERGIZED WORK REQUIREMENTS. ............. 2-22 300-2.5.1 INITIAL VOLTAGE VERIFICATION (IVV). ................. 2-22 300-2.5.1.1 Discussion. .............................. 2-22 300-2.5.1.2 Requirements. ............................ 2-22 300-2.5.1.3 Identification and Control of Stray Voltage. ............ 2-23 300-2.5.1.4 Requirements for IVV Checks Less Than 1000 Volts. ...... 2-27 300-2.5.1.5 Requirements for IVV Checks Greater Than or Equal to 1000 Volts. ...............................