Arc flash and electrical safety hazards can cause severe injury or death. Proper safety procedures and personal protective equipment are necessary when working with energized equipment. An arc flash incident captured on video shows three workers engulfed in flames after an arc flash from a 13,200V switchgear, resulting in severe burns over 60% of their bodies. Employers, employees, and owners all share responsibility for electrical safety programs, policies, training, and coordinating hazards.

1. ARC FLASH / BLAST SAFETY

27. What is an Arc Flash? NFPA 70E says an arc flash hazard is: A dangerous condition associated with the release of energy caused by an electric arc A hazard beyond shock and electrocution

35. AF Incident

36. AF Incident

37. AF Incident

38. AF Incident

39. AF Incident

42. Developments Leading to NFPA 70E-2004

45. AF Incident

53. Arcing Short Circuit

54. Flash protection boundary Limited approach boundary Limited space Restricted approach boundary Restricted space Any point on an exposed, energized electrical conductor or circuit part Prohibited space Prohibited approach boundary Flash protection boundary: An approach limit at a distance from exposed live parts within which a person could receive a second degree burn if an electric arc flash were to occur. (NFPA 70E)

55. Arc Flash Boundary

58. Section 110.16 of the 2002 NEC® Requires Arc Flash Hazard Labels

62. Arc Flash and Shock Hazard Appropriate PPE Required

65. 48 inch Flash Hazard Boundary 7.4 cal/cm 2 Flash Hazard at 18 inches HRC 2 PPE Level, FR Clothes, Shield, Hard Hat, Leather Gloves, Leather Shoes, Hearing Protection 480 VAC Shock Hazard when Cover is removed 42 inch Limited Approach 12 inch Restricted Approach - 500 V Class 00 Gloves 1 inch Prohibited Approach - 500 V Class 00 Gloves Courtesy E.I. du Pont de Nemours & Co. Arc Flash and Shock Hazard Appropriate PPE Required

66. Minimize Risk with Good Safety Practices

67. Arc Flash and Shock Hazard Appropriate PPE Required 24 inch Flash Hazard Boundary 3 cal/cm 2 Flash Hazard at 18 inches HRC 1 PPE Level, FR Pants & Shirt – 4 cal/cm 2 480 VAC Shock Hazard when Cover is removed 42 inch Limited Approach 12 inch Restricted Approach - 500 V Class 00 Gloves 1 inch Prohibited Approach - 500 V Class 00 Gloves Courtesy E.I. du Pont de Nemours & Co.

72. Arc Flash Incident

84. What an Arcing Fault looks like:

89. The End Gillis safety services, llc © 6479 County Road 437 Cullman, Alabama 35057 Phone: (205) 913-0107 Cell: (205) 212-4087 E-Mail: [email_address]