The appropriate length of satellite cable depends on various factors such as the distance between your satellite dish and receiver, the route the cable will take, and any potential obstructions. It's generally recommended to measure the distance between these two points and add a little extra to accommodate any unexpected twists or turns in the cable's path. It's better to have a slightly longer cable than needed rather than falling short during installation. Additionally, consider factors like weatherproofing and cable quality to ensure optimal performance and longevity. If in doubt, consulting with a professional installer can help determine the ideal cable length and other factors for your specific setup.