Benq DV2050 사용자 설명서

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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 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 to the point of cable entry as practical.”

25. Installation of an external antenna - 

When installing an outside antenna to the 

television equipment, be sure the antenna 

system is grounded so as to provide some 

protection against voltage surges and 

built-up static charges. Section 810 of the 

National Electrical Code provides 

information with respect to: 

• proper grounding of the mast and 

supporting structure; 

• grounding of the lead-in wire to an antenna 

discharge unit; 

• size of grounding conductors; 
• location of antenna-discharge unit; 
• connection to grounding electrodes;
• and requirements for the grounding 

electrode.

EXAMPLE OF ANTENNA GROUNDING AS
PER NATIONAL ELECTRICAL CODE

For added protection for this television 

equipment during a lightning storm, or 

when it is left unattended and unused for 

long periods of time, unplug it from the wall 

outlet and disconnect the antenna. This will 

prevent damage to the equipment due to 

lightning and power-line surges.

An outside antenna system should not be 

located in the vicinity of overhead power 

lines or other electric light or power circuits, 

or where it can collide with such power lines 

or circuits. When installing an outside 

antenna system, extreme care should be 

taken to keep from touching such power 

lines or circuits, as contact with them might 

be fatal.

WARNING: FCC Regulations state that any unauthorized changes or modifications to this
equipment not expressly approved by the manufacturer could void the user's authority to
operate this equipment. (U.S.A. ONLY)