What are the 4 arc flash categories?
What are the 4 arc flash categories?
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 does 12 cal cm2 mean?
Calories per Centimeter Squared (cal/cm2): This is a number identifying the amount of energy that can be delivered to a point at a particular distance from an arc flash. Once this value is known, the ATPV rating of the flash clothing required for work at that distance from the potential flash hazard is also known.
What are the different categories of FR clothing?
Four categories range from PPE category 1, that allows single-layer FR arc-rated shirts, pants or coveralls, up to Category 4, that requires a FR arc-rated shirt and pants, plus a double layer switching coat and pants. (NOTE: As of the 2015 edition of NFPA 70E, all garments for PPE 1 through 4 MUST be Arc-Rated.
How many different categories of arc flash PPE are there?
four Arc Flash PPE Categories
The National Fire Protection Association (NFPA) uses four Arc Flash PPE Categories to classify ranges of arc flash hazards, and the corresponding requirements for PPE.
What is a 40 cal suit rated for?
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.
What is a cal rating?
CAL Rating: In this case, “CAL” refers to a more detailed, precise measure of protection, and is labeled in calories, or the units used to describe the force of an arc flash. For example, an article of clothing with a CAL rating of 8.1 would provide protection if an arc flash was 8.1 calories or less.
What are the 4 categories of PPE?
For the purpose of this site, PPE will be classified into categories: eye and face protection, hand protection, body protection, respiratory protection, and hearing protection. Each category includes its own corresponding safety equipment that will be described below.
What PPE is required for Category 0?
HRC PPE Category 0: < 1.2 cal/cm2 PPE – safety glasses or safety goggles, hearing protection (ear canal inserts), voltage rated gloves with leather protectors.
Is CAT 3 FR better than CAT 2?
A CAT rating (short for PPE Category rating) is a way to quickly identify the level of protection that a FR/AR garment offers in the event of an arc flash….CAT RATINGS 1-4.
| CAT rating | Minimum Arc Rating (calories/cm²) |
|---|---|
| 2 | 8.0 cal/cm² |
| 3 | 25 cal/cm² |
| 4 | 40 cal/cm² |
What does FR CAT 4 mean?
Prior to 2015, the National Fire Protection Association (NFPA) identified the level of arc flash protection clothing workers must wear by 4 FR Hazardous Risk Categories (HRC).
