This installation guide provides comprehensive instructions for the assembly, cutting, and installation of the Trough (P31) cable tray system. Our knowledgeable production team works closely with each customer to provide quality solutions based on your schedule and budget. We want each and every experience with our. This method statement covers the site installation of the cable tray & ladders and the requirements of checks to be carried out. This section will guide you through the necessary steps to ensure a successful. 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.