The most common types of conductors for overhead transmission lines are aluminum-based due to their lighter weight and cost-effectiveness compared to copper. They include:

• Aluminum Conductor Steel Reinforced (ACSR): This is the most prevalent type, featuring a core of steel for high tensile strength, surrounded by layers of aluminum for conductivity.

• All-Aluminum Conductor (AAC): Made entirely of aluminum, it's used for shorter spans and lower voltage distribution lines.

• All-Aluminum Alloy Conductor (AAAC): This conductor uses a mix of aluminum with other alloys to provide better strength and corrosion resistance than AAC.