Severity index (S) | Protection measures | Environment |
11 | Defective or unknown protection | Submerged |
10 | Medium sensitivity device with earthing | Submerged |
9 | Defective or unknown protection | Wet |
8 | Defective or unknown protection | Dry |
7 | Medium sensitivity device with earthing | Wet |
6 | High sensitivity device | Submerged |
5 | High sensitivity device | Wet |
4 | Medium sensitivity device with earthing | Dry |
3 | PELV | Submerged |
2 | PELV | Wet |
1 | High sensitivity device | Dry |