This table was taken from the NFPA 70E -2004, "Standard for Electrical Safety in the Workplace" Table 130.7(C)(11) Protective Clothing Characteristics.
| Hazard/Risk Category |
Clothing Description (Typical number of clothing layers given in parentheses) |
Required Minimum Arc Rating of PPE cal/cm2 |
| 0 | Non-melting, flammable materials (i.e., untreated cotton, wool, rayon, silk, or blends of these materials) with a fabric weight at least 4.5 oz/yd2 (1) | N/A |
| 1 |
FR shirt and FR Pant or FR coverall (1)
|
4 |
| 2 |
Cotton underwear - conventional short sleeve and brief/shorts, plus FR shirt and FR pants (1 or 2)
|
8 |
| 3 |
Cotton underwear plus FR shirt and FR pant plus FR coverall, or cotton underwear and two FR coveralls. (2or3)
|
25 |
| 4 |
Cotton underwear plus FR shirt and FR pant plus multilayer flash suit (3 or more)
|
40 |