Selecting the right stringing block is crucial for preventing damage to the conductor. The key factors to consider are:

• Conductor Diameter: The groove in the sheave must be large enough to accommodate the conductor's diameter without pinching or causing abrasion.

• Maximum Load: The block's working load limit (WLL) must be rated to handle the maximum tension expected during the pull.

• Sheave Material: Sheaves are commonly made from aluminum alloy or high-strength nylon. Nylon sheaves are preferred for new generation conductors (e.g., ACCC, ACSS) as they are lighter and have a smooth surface that reduces the risk of damage.