Nokia RoofTop™ Wireless Router Installation Guide 41To install the router5.2.2 To prepare and install groundingNOTE: Grounding is only installed where the existing grounding systemis not sufficient for router grounding purposes.Because antennas are elevated metal objects with connections to ground,they attract lightning.Attaching an effective ground to the router provides a path for thelightning.1. Connect the grounding box connector marked “Surge” towards theantenna and the connector marked “Protected” to the Network/ PowerUnit (NPU) end of the cabling.2. Protect the connections as previously described, usingweatherproofing tape.3. Locate the lightning arrestor close to the point of entry to the home.4. Provide a good, very low resistance wire connection from thewireless router to the ground.5. Use #12 copper wire connected to the router grounding clamp and aground rod next to the building.