Cable tray systems are not required to be mechanically continuous, but shall be electrically continuous. They must also be bonded back to the power source. maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. A properly designed and installed cable tray system will provide. The IEC standard for cable tray includes multiple technical and performance-based criteria. Electrical continuity provides safety to people and property, and plays an essential role in the EMC. NEC Article 392 outlines the key rules for installing and maintaining industrial cable tray systems.
[PDF Version]