Yodalight 24VDC Red IP66

First digit: 6
Protection for persons:  
Protection against a wire touching dangerous parts.  
Definition:  A body 1,0 mm in diameter must not be able to enter. IP 6X

Test conditions: The accessing probe is pushed against every opening of the enclosure with a standardised force or is inserted through the opening.
Conditions for acceptance: The protection is satisfactory if a sufficient distance between the accessing probe and dangerous parts is kept.
Protection for equipment:  Sealed against dust
Definition:  Dust must not enter at all.
Test conditions:  The test is carried out in a dust chamber in which talcum powder is being kept suspended in the air by means of a dust distributor or similar device. The enclosure which is being tested is placed in the test chamber while a vacuum pump keeps the pressure in the enclosure below the atmospheric pressure of the environment according to the standard.
Conditions for acceptance: The protection is satisfactory if there is no visible dust deposit within the enclosure after completion of the test.
 
Second digit: 6
Protection against water :  Protection against powerful water jet.
Definition:  A strong water jet directed at the enclosure from any direction must not have any harmful effects. IP X6

Test conditions:  A jet nozzle with an inside diameter of 12.5 mm splashes a volume flow of 100 litres per minute from a distance of 2.5 - 3 metres from all sides onto the enclosure. The test time is 3 minutes.
Conditions for acceptance:  Should water have penetrated, it must not

- be present in quantities which impair the good working order of the operating material or represent a safety hazard;
- deposit on non-conducting parts where it could lead to creep currents;
- come in contact with live parts or coils which are unsuitable for operating in wet conditions;
- collect near the wire end or possibly penetrate the wire.