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LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 2017ELECTRICAL SAFETY MANUALPage 1 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 2017TABLE OF CONTENTSRevision History . 711.11.21.31.4Introduction. 8Purpose . 8Scope . 8Regulatory Drivers . 9Format . 9PART I – ELECTRICAL HAZARDS . 102Electrical Hazards . 112.12.22.32.42.52.6Electrical Hazard Classification . 233.13.23.33.43.53.63.73.8Explanation of the electrical hazard classification structure. 23Classification Matrix . 25Hazard Class 1.x, 50-60 Hz Nominal Power . 26Hazard Class 2.x, DC . 28Hazard Class 3.x, Capacitors . 30Hazard Class 4.x, Batteries 100 VDC . 34Hazard Class 5.x, RF Circuits (3 kHz to 100 MHz) . 36Hazard Class 6.x, Sub-RF Circuits (1 Hz to 3 kHz) . 383Scope . 11Electrical Shock. 11Electrical Burn. 18Delayed Effects . 21Battery Hazards . 21Other Hazards. 22PART II – ELECTRICAL SAFE WORK PRACTICES . 404Electrical Safety Principles & Controls. 414.14.24.34.44.54.64.7General Electrical Safety for All Persons . 495.15.25.3Scope . 49General requirements . 49Recognizing electrical hazards . 495Principles of Electrical Safety. 41Application of ISM to Electrical Safety . 42Planning Electrical Work . 43Hierarchy of controls. 45Authorization. 46Executing the Plan . 47Self-Controls for the Qualified Electrical Worker . 47Page 2 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 20175.45.55.65.75.85.95.105.115.125.13Electrical Safe Work Controls . 786.16.26.36.46.56.66.76.86.96.106.116.126.13Scope . 78Qualified Electrical Workers (QEWs) . 78Electrical Work and Requirement for a QEW. 79Mode 0 – Electrically Safe Work Condition . 83Mode 1 – Process for Establishing an Electrically Safe Work Condition (LOTO) . 84Mode 2 – Energized Diagnostics (Testing & Troubleshooting) . 86Mode 3 – Energized Repair Work (EEWP) . 89Electrical Safe Work Procedure (ESWP) . 90Person in Charge (PIC). 93QEW Skill of the Craft . 93Direct Field Supervision . 94Job Briefing . 95Working Alone or Accompanied . 9567Portable electric equipment . 55Extension cords for temporary use . 57Relocatable Power Taps (Power Strips). 61Adapter Cord Sets . 64Ground Fault Circuit Interrupters. 64Heating Tapes and Cords . 69Portable Heating Devices. 70Holiday Lights. 70Working Space Around Electrical Equipment. 70Switching . 74Shock Protection . 1007.17.27.37.47.57.67.77.87.9Arc Flash Protection . 1128.18.28.38.48.5Arc Flash Hazard Analysis . 112Determination of an Arc Flash Hazard . 113Incident Energy Analysis . 115Arc Flash Boundary . 115Working Distance. 1188Performing a Shock Hazard Analysis . 100Determination of a Shock Hazard . 100Shock Protection Boundaries. 102When Voltage Rated Gloves Are Required . 108When Leather Protector Gloves Are Required . 108When Voltage Rated Blankets or Sheeting Are Required. 109When Insulated Sticks (Hot Sticks) Are Required . 109Selection of Shock Protection PPE . 109Primary vs. Secondary Shock Protection . 110Page 3 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUAL8.68.78.88.98.108.118.128.138.149Revision: Rev 1Date: January 2017Incident Energy Analysis for Facility Power Systems. 118Incident Energy Analysis for R&D Systems. 119Energy Reducing Maintenance Switches . 119Arc Flash Labeling . 120Arc Flash PPE Selection . 121Arc flash incident energy 40 cal/cm2 . 123MCC Buckets, Busway Plug-In Units and Drawout Type Circuit Breakers . 124Daily Arc-Rated Work Wear for Electrical Work . 124Body Positioning for Arc Flash . 125Zero Voltage Verification (ZVV) . 1269.19.29.39.49.59.69.7Purpose . 126Live-Dead-Live Test Method . 127Steps to perform ZVV . 127Where to perform ZVV. 128When to perform ZVV . 129Types of Voltage Detectors . 130ZVV where there is no exposed conductor . 13110.110.210.310.4Minimum PPE for Electrical Work . 133Body Positioning . 133Controlling the Work Area (Alerting Techniques) . 136Other Precautions for Personnel Activities . 13911.111.211.311.411.511.611.7Scope . 145Qualification requirements . 145Restricted Access to High Voltage Enclosures . 145Switching . 146Zero Voltage Verification . 146Personal Protective Equipment . 147Temporary Personal Protective Grounding of High Voltage Circuits . 14712.112.212.3Hazards . 151Design Considerations . 151Safety Practices . 15113.113.213.3Permanently connected standby generators . 153Portable generator connection and operation. 153Uninterruptible Power Systems (UPS) . 15410 General Electrical Safe Work Practices . 13311 High Voltage Facilities Distribution Systems ( 750 VAC). 14512 High Voltage/Low Current DC Systems ( 1000 VDC, 40 mA) . 15113 Distributed Generation . 153Page 4 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 201714 Batteries . 15514.114.214.314.4Scope . 155Qualification & Training . 155Hazards . 156Operation and Maintenance . cope . 159Qualification & Training . 159Hazards . 159Stored Energy Hazard Assessment . 161Capacitor Discharge Time . 167Capacitor Hazard Labeling . 169Hard Grounding vs Soft Grounding . 169Establishing an Electrically Safe Work Condition (Mode 1) . 170Testing capacitors (Mode 2) . 172Personal Protective Equipment (PPE) . 172Storage & Disposal . 17316.116.216.3Scope . 174Hazards . 174Design and Construction . 17517.117.217.317.417.517.6Rubber Insulating Gloves. 176Rubber Insulating Blankets . 181Rubber Insulating Sheeting . 182PVC Insulating Sheeting . 183Arc-Rated PPE . 183Other PPE . 18715 Capacitors . 15916 Inductors . 17417 Personal Protective Equipment . 17618 Electrical Tools & Equipment . 18818.118.218.318.418.518.6Testing Equipment . 188Insulated Tools. 190Insulated Sticks . 190Temporary Personal Protective Grounds for R&D Equipment (Ground Hooks) . 191Temporary Personal Protective Grounds for Utilities (Ground Straps) . 192Other Tools . 194PART III – DEFINITIONS AND APPENDICES. 195Acronyms and Abbreviations . 196Page 5 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 2017Definitions . 197Appendix A: Standards on Personal Protective Equipment . 20819 Appendix B: Standards on Other Protective Equipment . 209Appendix C: In-Service Specifications for Personal and Other Protective Equipment . 210Appendix D: Reference Sheet for the QEW Skill of the Craft Work . 211Appendix E: List of Pre-Approved Voltage Detectors for Zero Voltage Verification . 213Page 6 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUALRevision: Rev 1Date: January 2017Revision HistoryRevisionInitialDatePublishedJuly 2015Rev 1Jan 2017SummaryInitial edition – implementation of NFPA 70E-2012, Standard for Electrical Safety inthe Workplace, and DOE-HDBK-1092-2013, Electrical Safety Handbook. Additionalmaterial from IEEE Std 3007.3-2012, Recommended Practice for Electrical Safety inIndustrial and Commercial Power Systems.Revision 1 of the Electrical Safety Manual incorporates a number of refinements andedits, including: Incorporated ESM Correction Notice 1-2015, adding balaclava for level 1 ofarc flash PPE Incorporated ESM Correction Notice 2-2015, requiring rackout of rackablebreakers for LOTO Changed capacitor thresholds to 10 J, 100 V Complete rewrite of Section 15 for Capacitors Clarified requirements for extension cords and temporary wiring Clarified requirements for relocatable power taps Clarified requirements for non-QEW switching thresholds Refined the definition of “electrical work” Added QEW-R level for researchers not exposed to line source hazards Added in QEW exceptions from PUB-3000 Chapter 8 Refined definition of Direct Field Supervision Job briefing requires a detailed discussion of the scope of work Safety Watch only needs to know the location of an AED unless performingMode 3 (EEWP) work. Refined requirements for when to wear rubber insulating gloves Added ANSI 535.5 details for temporary barricade tape and signage Added specifications for ground hooks for R&D equipment Modified requirements for temporary personal safety grounds for facilitiesequipment Cord-and-plug exemption extended to multiple plugs provided exclusivecontrol can be maintained Clarified two-person and barricade requirements for visual inspections Added requirement for arc-rated safety vests and cold-weather gear forpersonnel assigned with daily arc-rated wear. Removed requirement for minimum PPE when working on cord-and-plug120 V equipment that has been unplugged. Clarified ZVV requirements and supplementary voltage checks.Page 7 of 217
LAWRENCE BERKELEY NATIONAL LABORATORYELECTRICAL SAFETY MANUAL1Revision: Rev 1Date: January 2017Introduction1.1Purpose1.1.1The purpose of this Electrical Safety Manual is to establish Berkeley Lab site-specific electrical safe workpractices that meet regulatory requirements and match the types of hazards found on site.1.1.2The electrical safe work practices prescribed in this manual are mandatory, unless specifically indicatedas a recommended practice.1.2Scope1.2.1This manual establishes electrical safe work practices for both Qualified Electrical Workers (QEWs) andNon-QEWs.1.2.2It includes work on facilities distribution and premises wiring, and commercial and R&D typeequipment.1.2.3Institutional requirements for the overall Electrical Safety Program are found in Chapter 8, ElectricalSafety Program and are not repeated in this manual. These include:a. Scope and structure of the overall Electrical Safety Programb. Roles and responsibilities, including Electrical Safety Officers and Electrical Safety Advocatesc. Electrical
1.3.2 NFPA 70, National Electrical Code (NEC), 2011 edition 1.3.3 NFPA 70E, Standard for Electrical Safety in the Workplace, 2012 edition 1.3.4 OSHA 29 CFR 1910.7, Definition and requirements for a nationally recognized testing laboratory
