A small tray may not accommodate the required cables, while an oversized tray can result in wasted space and resources. Selecting the appropriate cable tray dimensions and size is essential for many kinds of reasons: The size of the cable tray has to be suitable on account of the kind of cables and the number of cables that it will carry. Overcrowding cables or using a small tray can cause electrical interference. In practice, cable tray dimensions are a system of interrelated measurements —width, depth, length, and material thickness—that directly affect cable fill compliance, heat dissipation, structural loading, and long-term expandability. Here in the UK, standard widths run from a slim 50mm for a handful of data runs right up to 900mm or more for the heavy-duty. 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.