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NFPA 70E and Fault Current


Course Description 

This course will review NFPA 70E and discusses the purpose and scope of the standard, that is designed to minimize the risk of employee injuries from electrical hazards and establish a safer workplace for employees who work on or near exposed live parts. We will review an overall electrical safety program. This course covers the principles of lockout/tagout, energy control procedures, and protective grounding for electrical systems.  The course will covers the general requirements for personal protective equipment (PPE) and flame-resistant (FR) clothing and how to select PPE for the specific hazards involved with various tasks.  This course will discuss the mechanics of Available Fault Current and some calculations that are used. We’ll also discuss how this relates to the NEC in different sections in the code.  We will review how Arc Flash and Fault Current are related.


Course Material on CD

Presentation in Power Point
Spreadsheet on Arc Flash Categories


Course Outline

  • Scope of NFPA 70 E 2018
  • Definitions
  • General Requirements for Electrical Safety – Related Work Practices
    • Training Requirements
    • Electrical Safety Program
    • Use of Equipment
  • Establishing an Electrically Safe Work Zone
    • Electrical Safe Work Zone
    • Lockout/Tagout
  • Work Involving Electrical Hazards
    • Energized Work
  • Shock Hazard
  • Arc Flash Hazard
  • Safety-Related Maintenance Requirements
  • Safety Requirements for Special Equipment
  • What is Fault current
    • Shorts Circuit Faults P-P, P-N, P-P-P, P-P-N
    • Arcing Faults – Bolted Faults
  • Code Sections
  • Fault Current
    • Actual Calculations
    • Infinite Bus Calculation
  • Equipment vs Arc Flash
    • IEEE 1584
  • Actual Calculations
    • Changes in Fault current
    • Largest Impedances
    • Neutral Grounding Resistor


Course Objectives

This course should help qualified individual understand NFPA 70E and Fault Current in electrical circuits.  This standard of NFPA 70E is to provide the worker in the electrical field a practical safe work area for the electrical personnel relative to the hazards arising from the work activities such as the installation, inspection, operation, and maintenance of electrical equipment. Qualified individual should have an understanding of fault current and the calculations used to determine fault currents in a circuit.


Credit Hours

8 Hours