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There are currently 6 names in this directory beginning with the letter U.
Underwriters Laboratories. An organization which tests and verifies construction and performance of electronics parts and equipment.

Ultraviolet (UV) Inhibitor
Chemicals in a PVC insulation compound protect the insulation from breaking down when exposed to sunlight.

Ultraviolet Degradation
The degradation caused by long time exposure of a material to sunlight or other ultraviolet rays containing radiation.

Unidirectional Concentric Stranding
A stranding where each successive layer has a different lay length, thereby retaining a circular form without migration of strands from on layer to another.

Unidirectional Stranding
A term denoting that in a stranded conductor all layers have the same direction of lay.

Unilay Strand
A conductor constructed with a central core surrounded by more than one layer of helically-laid wires, with all layers having a common length and direction of lay.