Loading ...NFPA 70E PPE SELECTION
October 22, 2008
Table 1: Example of NFPA 70E Hazard/Risk Category Classifications by Task
| 600V equipment other than MCCs, Panelboards and Switchgear | |
| Task | Category |
| Work on energized parts, including voltage testing | 2* |
| (2* means a double-layer switching hood, hearing protection, hard hat, leather gloves, and leather work shoes are required in addition to the Category 2 clothing requirements.) (If the available short circuit current is less than 10,000 amperes the hazard/risk category can be reduced by one Category level.) |
|
Table 2: FR clothing and corresponding incident energy for Hazard/Risk Categories
| NFPA 70E establishes five "Hazard/Risk Categories" of FR clothing based on ability to limit the injury to a curable burn at different levels of incident energy: | ||
| Category 0 | acceptable for incident energy exposure of | 0 - 2 cal/cm2 |
| Category 1 | " | 2 - 4 cal/cm2 |
| Category 2 | " | 4 - 8 cal/cm2 |
| Category 3 | " | 8 - 25 cal/cm2 |
| Category 4 | " | 25 - 40 cal/cm2 |
Story Tools: 
Email This Post
Print This Post
Top
Email This Post
Print This Post
Top
Story Comments (2)
Leave a Reply
You must be logged in to post a comment.
[...] “Hazard/Risk Category” to a specific task by voltage level and type of equipment. (See Table 1 in Tools.) The second table describes the FR clothing and corresponding incident energy for each of [...]
Category 0 is only if the table method is used. If you have a flash calculation, then category 0 is not applicable.