Lenovo IdeaCentre B500 - Manual (Page 17)

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Safety and warranty guide
Power supply statement
Never remove the cover on a power supply or any part that has the following label
attached.
Hazardous voltage, current, and energy levels are present inside any component
that has this label attached. There are no serviceable parts inside these
components. If you suspect a problem with one of these parts, contact a service
technician.
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
Ground clamp Power service grounding
electrode system (NEC
Article 250, Part H)
Antenna lead-in wire Ground clamps
Antenna discharge unit (NEC
Section 810-20) Electronic service
equipment
Grounding conductors (NEC
Section 810-21)
Figure 1. Proper grounding for the cable