Splice plates are the most widely used method for connecting cable tray sections in straight runs. We fix them with nuts and bolts through the holes in the plate and the tray sides. 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. Engineers and architects charged with the planning of cable support systems with cable trays. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Is your cable tray system optimized for safety, dependability, space and cost savings? 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. A cable tray joint plate might seem like a small component. In this guide, we will explore everything about joint plates.