In addition to protection against the risk of explosion or ignition, luminaires for use in hazardous areas will also need to provide adequate protection against the ingress of solids or liquids. The degree of classiﬁcation is denoted by the IP classiﬁcation system.
|IP0X No special protection||IPX0 No special protection|
|IPIX Objects ≥50mm diameter (e.g. part of a hand)||IPX1 Vertically dripping water|
|IP2X Objects ≥12.5mm diameter (e.g. finger)||IPX2 Vertically dripping water when enclosure tilted by 1S°|
|IP3X Objects ≥2.5mm diameter (e.g. tool)||IPX3 Sprayed water up to 600mm from vertical|
|IP4X Objects ≥1.00mm diameter (e.g. wire)||IPX4 Sprayed water from all directions|
|IP5X Dust protection||IPX5 Water jets|
|IP6X Dust tight||IPX6 Powerful water jets|
|IPX7 Temporary submersion to a depth of 1m (for half an hour)|
|IPX8 Extended submersion to a depth ≥1m|
Where time and pressure are stated
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