ACSR stands for Aluminium Conductor Steel Reinforced, it is a stranded conductor that is more durable. It's typically used for transmission lines that run overhead. The conductor's exterior is constructed of pure aluminium, while the interior is built of steel. This conductor can be galvanised or coated with another substance to extend its life, to keep it from corroding. Steel has a higher strength than aluminium, allowing mechanical force to be applied over the conductor.
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