The second numeral indicates the level of protection against the harmful ingress of water. : No protection.
: Protected against the effects of continuous submersion in water under conditions specified by the manufacturer (usually deeper or longer than IPX7).
The heart of IEC 60529 is the two-digit IP rating scale. The following table provides the complete breakdown for both the First Digit (Solids) and Second Digit (Liquids): iec 60529 pdf best
For certain types of enclosures, a vacuum pump must draw air out of the enclosure to simulate thermal cycling or operational pressure drops. Water Testing (IPX5 to IPX8)
Standard for general outdoor architectural lighting or mild industrial environments. It handles basic dust and rain splashes. The second numeral indicates the level of protection
They frequently feature obsolete editions that lack newer specifications like high-pressure washing classifications.
The standard is periodically reviewed and updated, though major revisions are not annual. The last major revision was in 2013 with the addition of IPX9. Stability dates provided by the IEC (e.g., 2027) indicate when the standard is next scheduled for review. The heart of IEC 60529 is the two-digit IP rating scale
Protected against solid objects greater than 12.5 mm (e.g., fingers).
ANSI/IEC 60529-2020 is the current U.S. adoption.
This is a frequent mistake made by product teams. An enclosure rated (submersion) does not automatically qualify as IPX5 or IPX6 (water jets). High-pressure streams strike seals with completely different mechanical force dynamics than static underwater pressure. Devices meant to survive both environments must be dual-rated, written as IPX5/IPX7 . 2. IP Ratings Apply to Chemicals or Saltwater
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