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IP rated luminaires for jet wash with high temp. water?

pww235
Evening all.


Bit of a head scratcher:


IP65 / IP66 testing must use water that it within 5K of the specimen under test.

IP69 testing uses water at 80ºC (+/- 5ºC).


I have a process area that will be subject to jet washing with hot water fed from the domestic system and so will be somewhere in the region of 40ºC - 60ºC.


The luminaires within the space shall be IP66 for the water flow rates but should they also be IP69 rated to account for the hot water?


Appreciate any thoughts.


P
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    Mike,

    Thanks for the additional information. Very good point about the jet wash pressure. Not having a copy of the standard to hand (and not having had to deal with IP69 before) I had not picked that up. The OP doesn't mention pressure, but only mentions 'fed from the domestic hot water' (which would not be at high pressure) and 'jet washing' which implies that the supplied water is fed through a pressure wash arrangement of indeterminate pressure.

    It probably also depends on where the jet wash system operates and where the lights are located, so whether the lights can be directly sprayed by the jet wash or just affected by the resultant spray/mist.

    Alasdair
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  • 0
    Mike,

    Thanks for the additional information. Very good point about the jet wash pressure. Not having a copy of the standard to hand (and not having had to deal with IP69 before) I had not picked that up. The OP doesn't mention pressure, but only mentions 'fed from the domestic hot water' (which would not be at high pressure) and 'jet washing' which implies that the supplied water is fed through a pressure wash arrangement of indeterminate pressure.

    It probably also depends on where the jet wash system operates and where the lights are located, so whether the lights can be directly sprayed by the jet wash or just affected by the resultant spray/mist.

    Alasdair
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