1. Cables over 300 meters.
2. For large cross-sections, use a tile-shaped cable.
3. For example, a VV cable with a 3*300+2*150 diameter typically uses a 3 large tile + 1 small tile + 1 round cable. This configuration offers advantages such as a stable and compact structure and minimizes material waste. Using round cores for low-voltage cables with such large cross-sections would waste significant material, and the cable core structure would be unstable, making it prone to irregularities.
