What is a key factor in determining the distance between supports for MC cable installations?

The length of the cable run is a key factor in determining the distance between supports for MC (Metal-Clad) cable installations because it directly affects how the cable is secured and supported during installation. Standard practices and codes stipulate certain support intervals to ensure that the cable remains securely in place without risking damage or excessive stress on the cable itself.

If the cable run is long, it could require more intermediate supports to prevent sagging or excessive movement. Ensuring the cable is well supported helps maintain its integrity and functioning over time. This consideration becomes more critical in longer cable runs, where the weight of the cable and environmental factors can create additional challenges that necessitate stricter support intervals.

Other options may be related to installations in some context, but they do not directly affect support distances as significantly as the length of the cable run does.