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UV Stability

UV Stability of Electrical Conduits

UV stability is an important property of electrical conduits, but only few people know how to interpret the laboratory test results.

Laboratory test according to DIN EN ISO 4892-3

Outdoors conduits are exposed to varying environmental factors (UV radiation, temperature, humidity ...) These factors ar called "weathtering".

UV stability or weathering resistance of plastic materials is tested under laboratory conditions according to DIN EN ISO 4892-3 (this test is also referred to as evaluation of fastness to weathering or resistance to fading): During a time period of 1000 hours conduits are exposed to an average temperature of 50 °C and alternating exposure to UV radiation, water fog and condensation to simulate rain.

Which conclusions can be drawn from test results?

As the level of solar radiation varies from location to location, it is not possible to give an overall statement on UV-stability under natural conditions. For specific references it would be necessary to know the exact place of installation. .

In a (mid-)european climate the experimental setup corresponds to the weathering to be expected at protected outside areas during one year.
piktogramm-uv.png

UV stable conduits

Dietzel products labelled "UV stable" can be installed at protected outside areas without direct solar radiation, such as installations in shadowy places or outer walls with only partial exposure to sunlight.

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