Name one type of electrical cable commonly used in overhead lines.

ACSR, or Aluminum Conductor Steel Reinforced, is a type of electrical cable that is commonly used in overhead power lines. This cable configuration combines aluminum strands, which provide good conductivity and lightweight properties, with steel strands that add strength and support. The steel core helps to withstand the mechanical stresses that overhead lines face, such as wind, ice, and tension from spans between poles.

In addition to its strength and lightweight characteristics, ACSR is favored for its high conductivity and durability, making it an ideal choice for long-distance power transmission. It can effectively handle high-voltage applications, which is critical for the efficiency of overhead power distribution networks.

Other cables listed, such as THHN, PRP, and XLPE, while relevant for various applications, are not typically used for overhead lines. THHN is primarily used for interior wiring, PRP is more specialized for certain installations, and XLPE is often used for insulation in cables but not specifically for overhead line applications.