What are the levels of arc flash PPE?

Four Categories of Arc Flash PPE

• PPE Category 1: Minimum Arc Rating 4 cal/cm2
• PPE Category 2: Minimum Arc Rating 8 cal/cm.
• PPE Category 3: Minimum Arc Rating 25 cal/cm.
• PPE Category 4: Minimum Arc Rating 40 cal/cm.

What is arc rating of PPE based on?

The Arc Rating is the maximum incident energy resistance demonstrated by a material prior to break open (a hole in the material) or necessary to pass through and cause with 50% probability a second or third degree burn.

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…

What is arc flash clothing rating?

The arc rating is the number of calories that the garment is expected to “absorb” if exposed to an electric arc. Arc rating is, in essence, the level of protection provided to you, the wearer. Calorie is the unit of measure of the heat energy of an arc flash and the protective level of FR clothing.

What is arc flash rating?

More simply put, arc rating measures insulation of FR fabrics to arc flash. The arc rating can be reported as ATPV (Arc Thermal Performance Value) or Ebt (Energy Breakopen threshold) – more on the difference between these in a future post- and is a single number, the higher the better.

When is arc flash PPE required?

Arc flash personal protective equipment (PPE) is required by OSHA and described in NFPA 70E. When working within the arc flash boundary, and when a risk analysis determines that there is a likelihood of occurrence of an arc flash event, then arc flash PPE shall be worn.