Chapter 6: Installation Mount the ODU, LPU and surge suppressorPage 6-15Basic requirementsThe following basic protection requirements must be implemented: ODU must be in ‘Zone B’ (see Lightning protection zones on page 3-9). ODU must be grounded to the supporting structure. A surge suppression unit must be installed on the outside of the building. The distance between the ODU and Gigabit Surge Suppressor should be kept to a minimum. The drop cable must not be laid alongside a lightning air terminal. All grounding cables must be a minimum size of 10 mm 2 csa (8AWG), preferably 16 mm2 csa(6AWG), or 25 mm2 csa (4AWG).Protection requirements for a wall installationIf the ODU is to be mounted on the wall of a building, then in addition to the general protectionrequirements (above), the following requirements must be observed: The equipment must be lower than the top of the building or its lightning air terminal. The building must be correctly grounded.Schematic examples of wall installations are shown in Figure 73.Figure 73 Grounding and lightning protection on wall
