Electrical Safety Program Adopted January 2014 Revised April 23, 2020 The official version of this document will only be maintained online. The official version of this document will only be maintained online. Electrical Safety Program Table of Contents Table of Contents Chapter 1: Introduction ..................................................................................................... 1 1.1 Purpose ............................................................................................................................... 1 1.2 Scope ................................................................................................................................... 1 1.3 Definitions ........................................................................................................................... 1 1.4 Responsibilities ................................................................................................................... 7 1.5 Basic Electrical Safety Principles ......................................................................................... 9 Chapter 2: Training Requirements ................................................................................... 11 2.1 Initial Training ................................................................................................................... 11 2.1.1 Electrical Work – Normal Operation ........................................................................... 11 2.1.2 Qualified Electrical Worker – Maintenance, Inspection, Troubleshooting, Construction ................................................................................................................ 12 2.2 Retraining .......................................................................................................................... 13 2.3 Documenting Training and Experience ............................................................................. 13 Chapter 3: Electrical Protective Equipment ...................................................................... 15 3.1 General Requirements ...................................................................................................... 15 3.2 Personal Protective Equipment (PPE) ............................................................................... 15 3.3 Insulating Materials and Tools .......................................................................................... 16 3.4 Access Limiting Equipment ............................................................................................... 17 Chapter 4: Identifying Electrical Hazards .......................................................................... 19 4.1 Hazard Identification and Risk Assessment ...................................................................... 19 4.2 Hazardous Effects of Electricity on the Human Body ....................................................... 19 4.3 Power Electronic Equipment and Electricity .................................................................... 21 4.4 Hazards Associated with Power Electronic Equipment .................................................... 21 Chapter 5: Minimizing Electrical Hazards.......................................................................... 23 5.1 Arc Flash Hazard Analysis Implementation ...................................................................... 23 5.1.1 West Lafayette Campus .............................................................................................. 23 5.1.2 Other Purdue University Properties and Facilities ..................................................... 24 5.2 Electrical Equipment Labeling ........................................................................................... 24 Chapter 6: Working On or Near Energized Electrical Equipment ....................................... 27 6.1 Energized Electrical Work Permits .................................................................................... 28 6.1.1. Use of Energized Work Permit .................................................................................... 29 6.1.2. Exemptions to Energized Work Permit ....................................................................... 29 6.2 Approach Distances to Exposed Energized Parts.............................................................. 29 6.2.1 Shock Protection Boundaries ...................................................................................... 29 6.2.2 Arc Flash Protection Boundary ................................................................................... 30 Chapter 7: Working on De-Energized Electrical Equipment ............................................... 33 7.1 Lockout/Tagout Program .................................................................................................. 33 7.2 Electrically Safe Condition ................................................................................................ 33 7.3 Other Precautions ............................................................................................................. 34 Chapter 8: Flexible Cords and Portable Electrical Equipment ............................................ 35 8.1 General .............................................................................................................................. 35 8.2 Extension Cords................................................................................................................. 36 Page i of ii The official version of this document will only be maintained online. Electrical Safety Program Table of Contents 8.3 Portable Cord-and-Plug Devices ....................................................................................... 38 8.4 Lamps ................................................................................................................................ 38 8.5 Wet or Damp Locations .................................................................................................... 38 Chapter 9: Temporary Wiring .......................................................................................... 39 9.1 Grounding and Electrical Connections .............................................................................. 39 9.2 Temporary Flexible cords and Cables ............................................................................... 39 Chapter 10: Working Space Around Electric Equipment (600 volts, nominal, or less) .......... 41 Chapter 11: Access and Entrance to Working Space ........................................................... 43 11.1 Illumination ....................................................................................................................... 43 11.2 Headroom ......................................................................................................................... 43 11.3 Dedicated Equipment Space ............................................................................................. 43 Chapter 12: Vehicular and Mechanical Equipment ............................................................. 45 12.1 Elevated Equipment .......................................................................................................... 45 12.2 Equipment Contact ........................................................................................................... 45 12.3 Equipment Grounding ....................................................................................................... 46 Chapter 13: Miscellaneous ................................................................................................ 47 13.1 Research and Development Laboratories ........................................................................ 47 13.2 Contractor Employees ...................................................................................................... 47 Appendices ...................................................................................................................... 49 Appendix A: Regulatory References ................................................................................ 50 Appendix B: Arc Flash and Shock Hazard Labels .............................................................. 51 Appendix C: Hazard Assessment and Energized Electrical Work Permit Instructions..... 52 Appendix C-1: Hazard Assessment for Electrical Work Form ...................................... 56 Appendix C-2: Energized Electrical Work Permit Form ............................................... 57 Appendix D: Hazard Risk Assessment Instructions .......................................................... 58 Appendix D-1: Hazard Risk Assessment Form ............................................................. 59 Appendix E: Electrical Cord Repair Guidelines for Physical Facilities .............................. 60 Appendix F: Example Electrical Safety Training Checklist ................................................ 61 Page ii of ii The official version of this document will only be maintained online. Electrical Safety Program Chapter 1: Introduction Chapter 1: Introduction 1.1 Purpose The Electrical Safety Program (ESP) was created to comply with electrical systems regulatory requirements to ensure that energized electrical work at Purdue University facilities is performed safely by qualified electrical workers who are provided with appropriate safe work procedures, protective equipment, and other controls. It is intended to protect employees against electricity-related hazards. These hazards include electrical shock and burns; arc flash