Answer: EHV cable laying is a highly specialized task that presents unique challenges beyond those of standard electrical cables. The primary difficulties arise from the cables' large size, weight, and the stringent technical requirements. Key challenges include:

• Handling and Installation: EHV cables are heavy and have a large diameter, requiring specialized hydraulic pulling equipment and precise tension control to prevent damage during installation.

• Thermal Management: Due to the high current, EHV cables generate significant heat. Effective heat dissipation is critical, often requiring specialized backfill materials or even forced cooling systems to maintain a safe operating temperature and prevent insulation degradation.

• Jointing and Terminations: The integrity of EHV cable joints is paramount. These joints must be expertly crafted in a controlled environment to ensure zero defects, as any imperfection can lead to catastrophic failure.