What is an arc flash label?
Arc flash labeling is the responsibility of the employer, not the manufacturer or installer of the equipment. Labeling is required for any piece of electrical equipment that may need examination, adjustment, service or maintenance while energized, creating the potential for an arc flash incident to occur.
How do you read an arc flash label?
How To Read Arc Flash Labels
- #1: WARNING. At the top of the label is the warning label.
- #2: Working Distance.
- #3 Incident Energy.
- #5 Shock Hazard when cover is removed.
- #6 Limited approach boundary.
- #7 Restricted approach boundary.
- #8 Glove Class.
What information is required on an arc flash label?
At a minimum, these labels must contain the nominal system voltage, the arc flash boundary, and at least one of the following: the available incident energy and the corresponding working distance or the arc flash PPE category found in the PPE category tables, the minimum arc rating of clothing, or the site-specific …
Where do you put arc flash labels?
Typically, the label is placed outside the panel or enclosure door. In some cases, companies choose to put the label inside the door to protect it from harsh environments; however, this should only be done if the door must be opened (allowing the label to be seen) in order to remove the panel face or enclosure.
At what voltage are arc flash labels required?
50 volts
Understanding the Arc Flash Warning Labels Each piece of equipment operating at 50 volts or more and not put into a deenergized state must be evaluated for arc flash and shock protection.
What boundaries are typically shown on the are flash labels?
Nominal voltage, limited and restricted approach boundaries, and PPE glove rating are also displayed on the label to help protect workers from electric shock.
How is arc flash measured?
Arc flash heat energy is measured in Joules/cm2 (J/cm2) or Calories/cm2 (Cal/cm2). – What is a Calorie? A calorie is the energy required to raise one gram of water one degree Celsius at one atmosphere. One calorie/cm2 can be equal to holding your finger over the tip of a flame of a cigarette lighter for one second.
What are the three hazards of arc flash?
An arc flash can cause minor injuries, third degree burns and potential death as well as other injuries including blindness, hearing loss, nerve damage and cardiac arrest.
Do disconnects need arc flash labels?
2. Is the disconnect likely to require examination, adjustment, servicing, or maintenance while energized? If you answer YES to both questions, you need an arc flash hazard warning label. NOTE: Yes, the questions are almost identical in both, the NEC and the NFPA.
What is arc flash boundary?
The arc flash boundary is the minimum “safe” distance from exposed energized conductors or circuit parts that has the potential for an arc flash. Arc fault incidents happen daily in the United States.
What does equipment require an arc flash label?
Labeling is required for any piece of electrical equipment that is likely to require examination, adjustment, service or maintenance while energized, creating the potential for an arc flash incident to occur. Thus, many employers are also labeling bus ducts and other electrical equipment not specifically called out in the NEC.
What is an arc flash hazard warning label?
What is an Arc Flash Hazard Warning Label? An Arc Flash Hazard Warning Label in short is a way to warn workers about the potential Arc Flash Hazard that may be ahead. An evaluation of arc flash and shock protection needs to be performed on each piece of equipment operating at 50 volts or more and not put into a de-energized state at your facility.
What are arc flash standards?
ARC FLASH STANDARDS. NFPA 70E. NFPA 70E is the Standard for Electrical Safety in the Workplace. This is a document that is published by the NFPA and is not an OSHA document.
What are the requirements for arc flash?
Arc flash PPE requirements should feature head-to-toe protection against serious electrical hazards so you’re able to get the job done in the safest, most efficient and professional manner possible. Appropriate arc flash PPE requirements includes fire- and heat-resistant gear and insulated tools to protect your entire body from…