ASTM B979-12(2018)
- Standard Specification for Non-Specular (NS) Surface Finish on Overhead Aluminum Electrical Conductors
- standard by ASTM International, 03/01/2018
- Category: ASTM
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1.1 This specification covers non-specular surface finishes on overhead aluminum electrical conductors. Overhead aluminum electrical conductors, when installed, typically have a shiny surface appearance. This “reflective” or “specular” surface can make a transmission line more noticeable in appearance against the background landscape. A factory treatment process of the outer surface of the aluminum wires can render the surface finish into a dull, non-reflective, matte grey finish. This non-reflective or “de-glared” surface finish allows the conductor to become less visible when observed from a distance and enables the transmission line to blend in with the skyline or landscape background.2
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