Selecting the right clamp size is critical for preventing damage to the conductor and ensuring a secure hold. The primary factors to consider are the rated capacity (the maximum load in kN or tons) and the applicable conductor diameter range (in mm). Always choose a clamp with a working load limit (WLL) that exceeds the maximum expected pulling tension of your project. The clamp's jaw opening must also be appropriate for the conductor's diameter to achieve a firm, non-slip grip without crushing or deforming the cable.