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XUK2ARCTL2 is rated for Nema 3 4 4X 6 12 & 13 but has instructions which state for indoor use only. Why?

NEMA standard does not consider sunlight in determination of ratings. Therefore, any product which has not been tested separately for UV exposure will be rated indoor only. In this case, the plastic casing of the sensor will eventually deteriorate when exposed to direct sunlight. If a sensor is tested for UV tolerance and passes, then it would be rated for indoor and outdoor use. In testing, the French tests assumed that most applications would be in factories, hence no UV testing was done.

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