Most appliances, devices and various types of equipment systems require an electrical power supply, and the proper operation of telecommunication system exchanges requires a physical connection to the transmitters and receivers. Power is supplied to the equipment via cables and data communication is provided via control cables. In the event of a system failure, the fault must be diagnosed quickly. Efficient remedial of the fault is ensured when easy access to the failed unit is provided. For this purpose, networks of cables and wires are laid in cable management or tray systems, specially designed for this purpose. We can divide cable trays into e.g. metal cable trays, PVC ducting and underfloor installation systems. Cable and wire fastening components include clamps and brackets, cable ties, studs and anchors. Cables and wires should be laid out neatly and to ensure the safety of the whole building and its occupants.