110.16 New 2002 NEC ® Arc Flash Hazard Marking Requirement

1. 110.16 New 2002 NEC® Arc Flash Hazard Marking Requirement

2. 110.16 Flash Protection. Switchboards, panelboards, industrial control panels, and motor control centers in other than dwelling occupancies, that are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment. FPN No. 1: NFPA 70E-2000, Electrical Safety Requirements for Employee Workplaces, provides assistance in determining severity of potential exposure, planning safe work practices, and selecting personal protective equipment. FPN No. 2: ANSI Z535.4-1998, Product Safety Signs and Labels, provides guidelines for the design of safety signs and labels for application to products. Reprinted from NEC® 2002

3. 110.16 Flash Protection. Switchboards, panelboards, industrial control panels, and motor control centers in other than dwelling occupancies, that are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment. FPN No. 1: NFPA 70E-2000, Electrical Safety Requirements for Employee Workplaces, provides assistance in determining severity of potential exposure, planning safe work practices, and selecting personal protective equipment. FPN No. 2: ANSI Z535.4-1998, Product Safety Signs and Labels, provides guidelines for the design of safety signs and labels for application to products. Reprinted from NEC® 2002

5. WARNING ! Arc Flash and Shock Hazard Appropriate PPE Required Courtesy E.I. du Pont de Nemours & Co.

6. 24 inch Flash Hazard Boundary 3 cal/cm Flash Hazard at 18 inches • 2 1DF PPE Level, 1 Layer 6 oz Nomex ®, Leather Gloves Faceshield 480 VAC Shock Hazard when Cover is removed 36 inch Limited Approach 12 inch Restricted Approach - 500 V Class 00 Gloves 1 inch Prohibited Approach - 500 V Class 00 Gloves WARNING ! Arc Flash and Shock Hazard Appropriate PPE Required Equipment Name: Slurry Pump Starter Courtesy E.I. du Pont de Nemours & Co.

7. 24 inch Flash Hazard Boundary 3 cal/cm Flash Hazard at 18 inches • 2 1DF PPE Level, 1 Layer 6 oz Nomex ®, Leather Gloves Faceshield 480 VAC Shock Hazard when Cover is removed 36 inch Limited Approach 12 inch Restricted Approach - 500 V Class 00 Gloves 1 inch Prohibited Approach - 500 V Class 00 Gloves WARNING ! Arc Flash and Shock Hazard Appropriate PPE Required Equipment Name: Slurry Pump Starter Courtesy E.I. du Pont de Nemours & Co.

8. 110.16 Flash Protection. Switchboards, panelboards, industrial control panels, and motor control centers in other than dwelling occupancies, that are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment. FPN No. 1: NFPA 70E-2000, Electrical Safety Requirements for Employee Workplaces, provides assistance in determining severity of potential exposure, planning safe work practices, and selecting personal protective equipment. FPN No. 2: ANSI Z535.4-1998, Product Safety Signs and Labels, provides guidelines for the design of safety signs and labels for application to products. Reprinted from NEC® 2002

9. Requirements for safe work practices • Addresses hazards: • Shock • Arc Flash • Requirements forshock and arc flashboundaries • Requirementspersonal protectiveequipment

10. What are the hazards as you approach electrical equipment to perform work?

11. ArcFault BoltedShort Circuit A B A B

12. Electrical Arc Molten Metal 35,000 °F Pressure Waves Sound Waves Shrapnel Copper Vapor: Solid to Vapor Expands by 67,000 times Hot Air-Rapid Expansion Intense Light

13. TEST 4

21. Results: Test No.4 Sound P1 141.5 db @ 2 ft. >2160 lbs/sq.ft T2 T1 >225°C / 437°F > 225°C / 437°F T3 50°C / 122°F > Indicates Meter Pegged

22. TEST 3

29. Results: Test No.3 Sound P1 133 db @ 2 ft. 504 lbs/sq.ft T2 T1 62°C / 143.6°F > 175°C / 347°F T3 (No ChangeFrom Ambient) > Indicates Meter Pegged

30. What Are the OSHA Regulations and NFPA 70E Requirements for Workingon “Live” Equipment? © 2001 Cooper Bussmann, Inc.

31. Safe Work Practices OSHA 1910.333 (a) (1) & NFPA 70E 2-1.1.1 not to work “hot” or “live” except : 1. Deenergizing introduces additionalor increased hazards 2. Infeasible due toequipment designor operationallimitations Wearing Proper PPE?

33. Prohibited Shock Boundary: Qualified Persons Only. PPE as if direct contact with live part Restricted Shock Boundary: Qualified Persons Only Limited Shock Boundary: Qualified or Unqualified Persons** Only if accompanied by Qualified Person Flash Protection Boundary (FPB) Must wear appropriate PPE FPB dependent on fault level and time duration. Equipment Note: shock boundaries dependent on system voltage level

34. WARNING ! Arc Flash and Shock Hazard Appropriate PPE Required Courtesy E.I. du Pont de Nemours & Co. Are There Any Other Meansto Reduce the Risks?