A material that is considered suitable for outdoor use has gone through testing in accordance with UL 746C, the Standard for Safety of Polymeric Materials -- Use in Electrical Equipment Evaluations, of ultraviolet (UV) light exposure for 720 hours of twin-enclosed carbon or 1,000 hours of xenon-arc weatherometer conditioning, and/or water exposure or immersion for the seven days at 70 degrees C. The material is tested before and after exposure to these conditions for flammability, mechanical impact and mechanical strength.
The results may lead to one of the following outcomes:
(f1) -- Suitable for outdoor use with respect to exposure to ultraviolet light, water exposure and immersion in accordance with UL 746C. The (f1) footnote indicates that the material has met both UV and water exposure or immersion requirements as called out in UL 746C.
(f2) -- Subjected to one or more of the following tests: UV, water exposure or immersion in accordance with UL 746C, where the acceptability for outdoor use is to be determined by UL.The (f2) footnote indicates that the material has only met or has been tested partially for UV or water exposure or immersion.