The IP69K rating is for applications where high temperature and high pressure wash-down is used to clean and sanitize equipment. The rating was established in 1993 as
an extension to the IEC 60529 standard which was initially developed for road vehicles that required intensive cleaning such as dump trucks and cement mixers. The Food and
Beverage industries have adopted the IP69K rating as a durability test for products which are subjected to the daily sanitation process. The "6" applies to external
protection from dust. The "9" signifies protection from close range high-pressure spray-downs and the "K" applies to the high-temperature of the water used during the
The IP69K test requires the water pressure to be between 1160-1450 psi, at a rate of approximately 4 gallons per minute at a temperature of 179° F. The nozzle from
which the water is sprayed is between 4 and 6 inches from the product. The spray is applied at angles of 0°, 30°, 60° and 90° for 30 seconds for each angle
while the product is rotated at 5 rpm.
The IP69K and NEMA Type 4 standards both require the product to protect against the entry of water during a wash-down, but this is where the similarities end. The Type
4 test is mainly concerned with low pressure water at greater water volume and longer test distances (10-12 feet). In contrast, the IP69K test is performed at very close
range (4-6 inches) with a low volume of water but at very high pressure and temperature. Task lighting fixtures are typically mounted at low levels and are subjected to
heavy hose-down at close range with high temperature water making IP69K the ideal test for this environment and making an IP69K rated fixture better suited for this
application than a NEMA 4X product.