Ground wire OHTLstringingequipment.com/Stringing-Blocks--Sheaves.html target='_blank'>Stringing Blocks are a specialized type of block designed for the installation of earth wire or OPGW (Optical Ground Wire). They are distinct from standard conductor blocks as they often feature a different sheave design and material, typically steel or a specific type of nylon, that is suitable for the material and diameter of the ground wire. These are essential for ensuring the integrity and proper tensioning of the ground wire, which is a critical safety component of the overhead transmission line.