ELECTRICAL SAFETY HAZARDS HANDBOOK

Introduction
Why is Electrical Safety so Important?
Electricity Basics
Ohm’s Law
Types of Electrical Faults
Overloads
Short Circuits
Overcurrent Protective Devices
Interrupting Rating
Current Limitation
Fuses
Circuit Breakers
Circuit Protection Checklist
History of Electrical Safety
Electrical Safety Organizations
OSHA
The General Duty Clause
OSHA Regulations
NFPA
IEEE
NRTL
NEMA
ANSI
ASTM
NECA
Electrical Safety Codes and Standards
Working on Deenergized Equipment
Establish a Safe Work Condition
Working on Energized Equipment
Who is Qualified?
Energized Electrical Work Permit
Employer and Employee Responsibilities
Arc-Flash and Other Electrical Safety Hazards
Electrical Safety Hazards
Electric Shock
Arc-Flash and Arc Blasts
Arc-Flash Metrics
Arc-Blast Effect
Light and Sound Effects
Electrical Hazard Analysis
Shock Hazard Analysis
Approach Boundaries
Flash Hazard Analysis
Arc-Flash Calculations
Arc-Flash Hazard Calculation Examples
IEEE 1584 Arc-Flash Hazard Calculation
NFPA 70E Table Method
Steps Required to Use the NFPA 70E Table Method
Minimizing Arc-Flash and Other
Electrical Hazards
1. Design a Safer System
2. Use and Upgrade to Current-limiting Overcurrent Protective Devices
3. Implement an Electrical Safety Program
4. Observe Safe Work Practices
5. Use Personal Protective Equipment (PPE)
6. Use Warning Labels
7. Use an Energized Electrical Work Permit
8. Avoid Hazards of Improperly Selected or Maintained Overcurrent Protective Devices
9. Achieve or Increase Selective Coordination
Electrical Safety Summary
Annex A
Electrical Safety Terms and Definitions
Annex B
Electrical Safety Codes and Standards
Annex C
Energized Electrical Work Permit
Annex D
Arc-Flash Calculation Steps
Annex E
Arc Flash Calculator Tables
Annex F
Resources for Electrical Safety
Annex G
References
Annex H
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