IP42 vs IP56
Head-to-head comparison of two IEC 60529 ingress protection ratings.
IP42 and IP56 are both IEC 60529 ingress protection codes, but they differ in solid-object protection (level 4 vs 5) and liquid protection (level 2 vs 6). IP42 is rated for > 1 mm — small wires and dripping water at 15° tilt, while IP56 provides dust-protected and powerful water jets (12.5 mm nozzle).
With IP42, an enclosure receives protection against solid objects larger than 1.0 mm and protection against vertically falling drops of water when the enclosure is tilted up to 15° from its normal position.. It is an IEC 60529 ingress protection code combining first-digit (solid) level 4 with second-digit (liquid) level 2.
IP56 is dust-protected and resists powerful water jets (12.5 mm nozzle, 100 kPa). Suited to outdoor equipment subjected to heavy rain or hose-directed water.
Detailed comparison
The stronger rating on each row is highlighted in emerald.
Solid protection (first digit)
IP42
4 — > 1 mm — Small Wires
IP56
5 — Dust-Protected
Liquid protection (second digit)
IP42
2 — Dripping Water at 15° Tilt
IP56
6 — Powerful Water Jets (12.5 mm nozzle)
Dust-tight
IP42
No
IP56
Limited
Water-jet resistant
IP42
No
IP56
Yes
Submersible
IP42
No
IP56
No
Outdoor suitable
IP42
No
IP56
Yes
The exact difference (IP42 vs IP56)
Solid protection
IP42
Level 4 — > 1 mm — Small Wires
IP56
Level 5 — Dust-Protected
IP42 provides "> 1 mm — Small Wires" (level 4), while IP56 provides "Dust-Protected" (level 5). IP56 is 1 level higher.
Liquid protection
IP42
Level 2 — Dripping Water at 15° Tilt
IP56
Level 6 — Powerful Water Jets (12.5 mm nozzle)
IP42 handles 0.3 mm/min drip rate (Dripping Water at 15° Tilt), while IP56 handles 100 kPa (Powerful Water Jets (12.5 mm nozzle)). IP56 provides 4 levels more liquid protection.
NEMA equivalents
No direct NEMA equivalent.
Recommendation
IP56 offers higher overall protection than IP42. Choose IP56 for harsher environments; IP42 may suffice for milder conditions and can be more cost-effective.