Lenovo S310 Lenovo S310 Safety, Warranty, and Setup Guide - Page 14

should follow local codes and ordinances when installing appliances that connect to external antennas and cable/CATV systems. If local codes are not applicable, it is recommended that users/installers follow guidelines similar to those that follow. Note to CATV system installer This reminder is provided to call the CATV system installer's attention to Article 820-40 of the National Electrical Code (NEC) that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close as possible to the point of cable entry as practical. Example of antenna grounding Figure 3. Proper grounding for the cable Ground clamp Antenna lead-in wire Antenna discharge unit (NEC Section 810-20) Grounding conductors (NEC Section 810-21) Power service grounding electrode system (NEC Article 250, Part H) Ground clamps Electronic service equipment The following notice applies to all countries and regions. DANGER Outdoor antenna grounding If an outside antenna or cable system is connected to the equipment, be sure the antenna or cable system is grounded as to provide some protection against voltage surges and built-up static charges. 
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