What is proper PPE for arc flash?
arc rated long-sleeve shirt and pants (or coveralls) rubber insulating gloves with leather protectors. class E hard hat. safety glasses.
What is the minimum arc rating for PPE category 3?
PPE Category 3: Minimum Arc Rating 25 cal/cm Arc flash suit hoods are required and rubber insulating gloves & leather protectors or arc rated gloves are required.
What is arc flash PPE category number?
The Arc Flash Personal Protective Equipment (PPE) Category is determined by consulting the PPE tables in article 130.7 of the NFPA 70E standard. PPE categories range from 1 to 4 (with four having the highest incident energy rating and requiring the most protective gear).
What are the categories of PPE?
The different types of PPE include:
- Head and scalp protection;
- Respiratory protection;
- Eye protection;
- Hearing protection;
- Hand and arm protection;
- Foot and leg protection;
- Body protection;
- Height and access protection.
What does 4 Cal cm2 mean?
The ATPV is measured in cal/cm2, and it’s defined as the maximum incident heat energy that a fabric can absorb and lessen the injury to a 2nd degree burn. If the worker is exposed to a potential incident heat energy level of less than 4.0 cal/cm2, the proper ATPV clothing system is 4 cal/cm2.
How do I choose an arc flash suit?
The incident energy level should be listed in cal/cm2. This means that the highest energy level that this equipment will produce in an arc flash event will not exceed the posted cal/cm2 rating. Your arc flash PPE should contain a tag that has an arc thermal protective value (ATPV) rating (also listed in cal/cm2).
What does 40 Cal cm2 mean?
When you see an item that is marketed as a 40 cal arc flash suit, the number actually means that the suit is rated to protect against arc flashes with an incident heat energy level of up to 40 cal/cm2. A 40 cal/cm2 arc flash suit, therefore, would be designed to absorb heat energy 40 times more intense.
What determines arc flash rating?
Arc flash events can be dangerous and deadly. Many factors determine the severity of the event, but three values—current, time, and distance—largely determine the severity.