Lenovo M5800 Desktop - Manual (Page 14)

13
Safety, Warranty, and Setup Guide
Products with television tuner options installed
The notice below applies to products containing television (TV) tuner devices that
connect to external antennas or to cable/CATV systems, or both, and that are
intended to be installed in North America. Users and installers in other countries
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
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