In addition to cost, the use of an ACSR Cable in power transmission lines is a preferred choice due to its (aluminium's) low specific gravity.
One serious threat to power cables is corrosion. Whether the cable is used in overhead power applications, or run underground or overland, it typically comes into contact with the environment. And that’s where moisture and acidity come in play to corrode the cable. Copper is more susceptible to corrosion, and therefore cables made from it have a reduced lifespan. For instance, 25mm aluminium cable installed outdoors is likely to last twice longer than an equivalent copper cable.
Less costly. Fewer maintenance hazards. Longer lasting. Durable. These typical characteristics of aluminum. Make it a better choice for a conductor in power cables That’s why the aluminium Cable is now quickly replacing copper as the standard of choice for power cables.