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Arc Flash Awareness
Transcript of Arc Flash Awareness
W's of arc flash
Arc Flash Awareness
An arc flash hazard is a dangerous condition associated with the possible release of energy caused by an electric arc.
In other words.....
Why Electrical Safety is Important
Who is Affected?
Engineers, supervisory personnel, or others within the flash protection boundary
What is the Cost to the Business?
Average medical cost for a survivable arc flash victim is $1.5M
6-8 months of lost work
Devastating injury ends career
Cost of new equipment
Cost of install/repair
Loss of morale
When do They Occur?
5-10 arc flash explosions occur in electric equipment every day in the U.S.
Each year more than 2,000 people are treated in burn centers with severe arc flash injuries
Where do They Occur?
Main switchgear rooms
Motor control centers
Why do They Occur?
Poorly maintained equipment
Unsuccessful short circuit interruptions
Animals (squirrels, raccoons, snakes, etc.)
Arc flash Vocabulary
The amount of energy impressed on a surface, a certain distance from the source, that is generated during an arc event (measured in calories per square centimeter- cal/cm2)
Flash Protection Boundary-
Distance where the incident energy is equal to 1.2 cal/cm2 (1.2 cal/cm2 is the minimum energy required to produce 2nd degree burns on skin).
An electrical fault where current flows through ionized air, causing an arc (energy is dissipated in the surrounding air, such as lightning).
An electrical fault where high current flows through a solid connection (energy is dissipated in equipment, such as a grounding rod or cable).
NFPA 70 (NEC)
110.9- The need to have the correct interrupting rating
110.10- Selecting and coordinating protective devices that will clear a fault without damaging equipment
110.16- Affixing arc flash warning labels to equipment
NFPA 70B (Recommended Practices for Electrical Equipment Maintenance)
8.4.3- Fundamentals of Electrical Equipment Maintenance
An up-to-date short circuit and coordination study is essential for the safety of personnel and equipment.
NFPA 70E (Electrical Safety in the Workplace)
110.1- Responsibilities- Owner, Contractor, Employees
130.2- Electrically Safe Working Conditions
130.5 Arc Flash Hazard Analysis
205.3 General Maintenance Requirements
IEEE Standard 1584
Guide for performing Arc-Flash Hazard Calculations
OSHA- 29 CFR 1910
1910.333(a)(1)- Requirement to Deenergize
1910.333- Qualified Personnel and PPE
1910.335- Tools and Barriers
Recent Enforcement Actions
9-3-2009: Electrical Contractor- $148,000
2-24-2010: USPS Kansas- $191,000
4-30-2010: USPS Providence- $558,000
6-1-2011: Hartford Financial Services- $48,000
12-29-2011: Case Farms Chicken Processing- $288,000
7-9-2012: Maine Steel Fabricator- $132,000
10-10-2012: Fontarome Chemical- $51,000
Understand what it is
Increase awareness of the rules involved
Understand how bad things can get when they go wrong
10 arc flash injuries occur each day
An injured worker can spend one day in the hospital for each single percent of body burned
$10,000 to 15,000,000 cost per injury
Other injuries besides thermal burns
How much did your equipment cost?
If it is damaged-
How much will it cost to replace?
How much will it cost to install or repair?
How much will it cost due to downtime?
How much will premiums increase?
A shutdown that can't be scheduled, all too often becomes an unscheduled shutdown.
Taking a proactive approach to ensure a safe work environment
Caring about the safety of our employees (and their family)
Understanding that a human life is far more significant than any profit
Terminal illness vs. Catastrophic burn injury
PTSD more prevalent than those with spinal cord injuries, amputations, heart failure or major chest trauma.
Severe depression often leads to...
Most importantly, understand that at the end of the day,
EVERYONE GOES HOME
Policy & Procedures
It is less likely that workers, contractors and facility owners will allow energized work once everyone involved in the decision making process fully understands the laws, requirements, hazards, true costs and consequences associated with energized work.
-H. Landis Floyd (DuPont)
"The lethal potential of electricity cannot be underestimated. This accident could have easily resulted in a double fatality, as electricity moves-and can kill- at the speed of light. Due to the grave nature of these hazards, we are proposing the maximum fines allowed under the law."
OSHA Area Director
"These conditions cited here exposed workers to the swift and potentially deadly hazards of electric shock, arc flashes and arc blasts. This large fine reflects both the gravity of these hazards and the Postal Service's ongoing knowledge of and failure to correct them."
Asst. Secretary of Labor for OSHA
"What employers must understand is that they or their contractors must first de-energize electrical equipment and circuits before employees work on them."
OSHA Area Director
"A serious violation occurs when there is substantial probability that death or serious physical harm could result from a hazard about which the employer
knew or should have known
What else does OSHA say?
Basically it's an electrical explosion.
Is a facility getting the best value if they employ the services of a contractor that is not truly qualified?
Whomever you use to service your electrical needs, you owe it to yourself, your company, your contractor and their families to ensure that they are not only properly protected but that they are properly qualified.