These standards include guidelines for tray spacing, material selection, cable separation, and grounding requirements. Compliance with relevant codes ensures that the electrical system is both functional and safe. The Cable Tray ng standards, performance standards, test standards and application in this document have been tested extens ompetent professional en completely installed, without damage either to conductors or. Hubbell Take Off Support provides the contractor, engineer, end user a completed BOM, including all related products, counts, symbol legends and information required to price a project. Don't spend the many hours required to do counts and create BOMs for projects, rely on Hubbell's take off. NEC Article 392 outlines the key rules for installing and maintaining industrial cable tray systems. Route. 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. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transpos regulations which.