Il grado di protezione indica l’idoneità del materiale elettrico per varie condizioni ambientali. Il grado di protezione è dichiarato dal codice IP, che consiste di due cifre. La prima cifra descrive la protezione contro i corpi estranei, la seconda cifra indica la protezione contro l’ingresso dell’acqua.
| 1. Reference number | Protection against foreign bodies | 2. Reference number | Protection against water |
|---|---|---|---|
| 0 | No protection | 0 | No protection |
| 1 | Protected against solid foreign bodies with diameter ≥ 50 mm | 1 | Protection against dripping water |
| 2 | Protected against solid foreign bodies with diameter ≥ 12.5 mm | 2 | Protection against falling dripping water when the housing is tilted up to 15 |
| 3 | Protected against solid foreign bodies with diameter ≥ 2.5 mm | 3 | Protection against falling spray water up to 60° from the vertical |
| 4 | Protected against solid foreign bodies with diameter ≥ 1.0 mm | 4 | Protection against water spray from all sides |
| 5 | Protected against dust in harmful quantities | 5 | Protection against water jets (nozzle) from any angle |
| 6 | Dust proof | 6 | Protection against strong water jets |
| 7 | Protection against temporary immersion | ||
| 8 | Protection against permanent immersion | ||
| 9 | Protection against water during high-pressure/steam jet cleaning |
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