What is the permissible length of cable between supports in a typical electrical wiring configuration?

In typical electrical wiring configurations, the permissible length of cable between supports is indeed up to 10 feet. This guideline is essential for maintaining the integrity and safety of electrical systems. The reason for this limitation is related to the management of stress on the cable, which can occur through its weight and environmental factors, as well as ensuring that the cables are adequately supported to prevent sagging and potential damage.

Supporting cables at appropriate intervals is also crucial for compliance with the National Electrical Code (NEC), which specifies standards that help prevent mechanical damage and ensure that installations function safely and effectively. Adequate support helps to avoid issues such as insulation damage, exposure of conductors, and increased risk of electrical faults.

While the question might list other options such as 6 feet, which is commonly seen in certain applications, a standard finding in residential and commercial wiring permits spans up to 10 feet as a standard practice, thus ensuring that the installation remains compliant and safe.