Cable tray systems shall have adequate electrical continuity to ensure equipotential bonding and connection (s) to earth if required according to the application of the cable tray system. It also minimizes electromagnetic interference, improving system. Cable tray installation must comply with specific technical standards to ensure electrical safety, system reliability, and long-term maintainability. Route. Not all cable trays are equivalent. 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. cable trays are equivalent.