Classificazione IP
Le classificazioni IP ("Ingress Protection") sono definite nello standard internazionale EN 60529 e valutano il grado di protezione fornito dagli armadi elettrici contro l'ingresso di solidi e liquidi (oggetti, particelle, polvere, acqua, ecc.).
Maggiore il valore di ciascuna cifra, maggiore la protezione.
| Ingress Protection | Solids Rating | Liquids Rating |
| IP | 6 | 7 |
Solids
| Rating | Definition |
| 0 | No protection against contact and ingress of objects |
| 1 | Protected against solid objects greater than 50mm in size, like a hand |
| 2 | Protected against solid objects greater than 12.5mm in size, like a finger |
| 3 | Protected against solid objects greater than 2.5mm in size, like a screwdriver |
| 4 | Protected against solid objects greater than 1mm in size, like a thick wire |
| 5 | Dust protected. Limited ingress of dust permitted. Will not interfere with operation of the equipment |
| 6 | Dust tight. No ingress of dust |
Liquids
| Rating | Definition |
| 0 | No protection |
| 1 | Protected against water drops |
| 2 | Protected against water drops at a 15° angle |
| 3 | Protected against water spray at 60° angle |
| 4 | Protected against water splashing from any angle |
| 5 | Protected against water jets from any angle |
| 6 | Protected against powerful jets of water |
| 7 | Water tight against the effects of temporary submersion in water. Test requires 30 minute at 1 meter depth |
| 8 | Watertight against the effects of continuous submersion in water (up to 4 hours) |
