Arc Flash Risk reduction
Arc Flash Fun Facts Arc flash = Electric short resulting from ionized air 36,000 F = Four times the surface of the sun Arc Blast = Super heated air, vaporize metal, flying shrapnel 480 volt arc blast = 8 sticks of dynamite = 1000 pound wave Sound > 160 db = 9 mm gunshot 2 -4 inches from ear
.2 seconds from inception to blast Send metal parts flying at 700 MPH / Superman 1500 MPH Copper vaporizes 67,000 to 1 Injuries include: Burns/Vision/Hearing/Physical /Concussion
80% of all electrical injuries are due to arc flash 80% of all electrical injuries are human error
Statistics Arc Flash Burn Statistics:
5 10 workers go to burn centers every day 1 - 2 die every day Unreported Construction, production, mining, and oil and gas extraction activities are inherently dangerous and the primary sources of electrical injuries and deaths How does the pipeline industry compare? Risk Cannot be Eliminated Satisfying All OSHA Regulations to the very Best of our Ability will Not Eliminate the Risk of Injury, Nor Will it Eliminate the Risk of OSHA Violations or Lawsuits
Risky Business Human Injury / Loss of life OSHA Citation Production Loss Equipment Damage
At the Source Adjacent Equipment Nearby Equipment Equipment Damaged by Power Surge Personal Injury Claim Risk Cannot be Eliminated Satisfying All OSHA Regulations to the very Best of our Ability will Not Eliminate the Risk of Injury, Nor Will it Eliminate the Risk of OSHA Violations or Lawsuits
Regulations and Standards
OSHA 1910 NFPA 70E IEEE
OSHA Act of 1970 Sec 5 General Duty Clause(a) Each employer -(1) shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees; (2) shall comply with occupational safety and health standards promulgated under this Act.
(b) Each employee shall comply with occupational safety and health standards and all rules, regulations, and orders issued pursuant to this Act which are applicable to his own actions and conduct.
OSHA 1910 Electrical Standard Final Rule 2007 Federal Register # 72:7135-7221 - regarding the nature of
electrical accidents, Electrical accidents, when initially studied, often appear to be caused by circumstances that are varied and peculiar to the particular incidents involved. However, further consideration usually reveals the underlying cause to be a combination of three possible factors: work involving unsafe equipment and installations; workplaces made unsafe by the environment; and unsafe work performance (unsafe acts). The first two factors are sometimes considered together and simply referred to as unsafe conditions. Thus, electrical accidents can be generally considered as being caused by unsafe conditions, unsafe acts, or, in what is usually the case, combinations of the two. It should also be noted that inadequate maintenance can cause equipment or installations that were originally considered safe to deteriorate, resulting in an unsafe condition.
OSHA Regulations OSHA 1910.333 Work Practices regarding safe work
practices, Safety-related work practices shall be employed to prevent electric shock or other injuries resulting from either direct or indirect electrical contacts, when work is performed near or on equipment or circuits which are or may be energized. The specific safety-related work practices shall be consistent with the nature and extent of the associated electrical hazards
OSHA Regulations OSHA 1910.332 Electrical training
1910.332 (a) Employees in occupations listed in Table S-4 face such a risk and are required to be trained. 1910.332(b)(3)(iii) Type of training. The training required by this section shall be of the classroom or on-the-job type. The degree of training provided shall be determined by the risk to the employee. Table S-4 Electrical and Electrical and Electrical andElectronic Equipment Assemblers Electricians Electronic Engineers Painters Electronic Technicians Welders
Mechanics and RepairersStationary Engineers
Industrial Machine OperatorsRiggers and Roustabouts
Material Handling Equipment OperatorsBlue Collar Supervisors
OSHA 1910 Interpretation OSHA Interpretation 11/22/2005 regarding insulation
integrity of a temporary cable laying on the ground, However, in the absence of a specific standard covering a hazard, OSHA may issue a citation under Section 5(a)(1), the "General Duty Clause," of the Occupational Safety and Health Act (OSH Act), if it determines that: 1) the employer failed to keep its workplace free of a hazard to which its employees were exposed; 2) the hazard was recognized either by the cited employer or the employer's industry; 3) the recognized hazard was causing or was likely to cause death or serious physical harm; and 4) there was a feasible and useful means available to correct the hazard.
OSHA 1910 Interpretation OSHA Interpretation 11/14/2006 regarding NFPA 70E,
OSHA has not conducted a rulemaking to adopt the requirements of the latest edition of NFPA 70E and, therefore, does not "enforce" those requirements. However, industry consensus standards, such as NFPA 70E, can be used by OSHA and employers as guides in making hazard analyses and selecting control measures.
OSHA 1910 Interpretation OSHA Interpretation 11/14/2006 regarding managing
hazards, A violation of the General Duty Clause, Section 5(a)(1) of the Act, exists if an employer has failed to furnish a workplace that is free from recognized hazards causing or likely to cause death or serious physical injury. The General Duty Clause is not used to enforce the provisions of consensus standards, although such standards are sometimes used as evidence of hazard recognition and the availability of feasible means of abatement.
OSHA 1910 Interpretation OSHA Interpretation 11/14/2006 regarding NFPA 70E,
OSHA recommends that employers consult consensus standards such as NFPA 70E-2004 to identify safety measures that can be used to comply with or supplement the requirements of OSHA's standards for preventing or protecting against arc-flash hazards.
OSHA 1910 Interpretation OSHA Interpretation 11/14/2006 - regarding non-
compliance with a standard, To establish all of the elements of the affirmative defense of impossibility, an employer who can show that compliance with the terms of a standard is impossible under the circumstances must also show that it used alternative measures to protect employees, or that there were no such control measures.
OSHA 1910 Interpretation OSHA Interpretation 02/29/2008 regarding PPE,
While the NFPA 70E consensus standard has not been adopted as an OSHA standard, it is relevant as evidence that arc flash is a recognized hazard and that PPE is necessary to protect against that hazard.
OSHA 1910 Interpretation OSHA Interpretation 02/29/2008 - regarding arc flash,
The risk of injury largely depends on the amount of energy available to the breaker, how old it is, how well it was maintained, and the task that is to be performed, among other factors.
Basis for Compliance The OSHA General Duty Clause requires an employer to
furnish a workplace that is free from recognized hazards causing or likely to cause death or serious physical injury. Consensus standards may be used as evidence of hazard recognition and the availability of means of abatement. NFPA 70E is an OSHA acknowledged consensus standard NFPA 70E provides evidence of arc flash hazard and the availability of means of abatement.
Clarification Notes One Sentence Summary:
A safe work place requires continuous hazard recognition and abatement and a well trained (and verified) staff wearing appropriate PPE, using safe tools and following safe work practices In addition to using consensus standards such as NFPA 70E, concerns must be addressed including how old equipment is, how well it is maintained, how well it is designed, and the task that is to be performed, among others. OSHA citations usually include failure to train employees to perform work safely and/or to ensure that they implement what they learned.
Standard - NPFA 70E 2000 Part II Appendix B Existing knowledge about arc flash
exposure at voltage levels above 600 volts is limited. Article 2-126.96.36.199 Where it has been determined that work will be performed within the flash protection boundary by 3-188.8.131.52 of Part II, the flash hazard analysis shall determine, and the employer shall document, the incident energy exposure of the worker. As an alternative, the PPE requirements of 3-3.9 of Part II shall be permitted to be used in lieu of the detailed arc flash hazard analysis approach described in 3-184.108.40.206 of Part II No labeling requirement.
Standard - NFPA 70E 2004 Article 400.11 Switchboards, panelboards, industrial
control panels, and motor control centers that are in other than dwelling occupancies and are likely to require examination, adjustment, servicing, or maintenance while energized shall be field marked to warn qualified persons of potential 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.
Standard - NFPA 70E 2009 Article 130.3 states An arc flash hazard analysis shall
determine the Arc Flash Protection Boundary and the personal protective equipment that people within the Arc Flash Protection Boundary shall use. Article 130.3 Exception 2 states The requirements of 130.7(C)(9), 130.7(C)(10), and 130.7(C)(11), shall be permitted to be used in lieu of a detailed incident energy analysis Article 130.7(