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An example of a copper alloy conductor is cadmium copper wire, which is used for railroad electrification in North America. [5] In Britain the BPO (later Post Office Telecommunications ) used cadmium copper aerial lines with 1% cadmium for extra strength; for local lines 40 lb/mile (1.3 mm dia) and for toll lines 70 lb/mile (1.7 mm dia).
Commonly available C11000 Electrolytic-Tough-Pitch (ETP) copper wire is identical to higher-cost C10200 Oxygen-Free (OF) copper wire in speaker cable applications. Much more expensive C10100, a highly refined copper with silver impurities removed and oxygen reduced to 0.0005 percent, has only a one percent increase in conductivity rating ...
5.5 [1] [2] 2020 Nexans: 25,000 [3] 6.4 [4] 2020 LS Cable & System: 9,168 [5] 16.1 [6] 2021 Prysmian Group: 30,500 [7] 17.1 2022 Furukawa Electric: 4,192 [8] 4.6 [6] Furukawa Co. 44,853 [8] 3.1 [6] Elsewedy Electric: 14,000 1.1 Bambach Wires & Cables: 12,000 1.1
Coppers prices are already at record highs, with benchmark prices in London at about $10,000 per ton, more than doubling from the pandemic-era lows in early 2020.
The environmental cost of copper mining was estimated at 3.7 kg CO 2-eq per kg of copper in 2019. [51] Codelco, a major producer in Chile, reported that in 2020 the company emitted 2.8 t CO 2-eq per ton (2.8 kg CO 2-eq per kg) of fine copper. [52]
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