Electrical and mechanical safety information – Precautions for products with external television antenna connections

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Precautions for products with external television antenna connectors

In addition to the general precautions described earlier, be sure to observe the following precautions when using external television antennas with your product. Failure to observe these precautions could result in fire, bodily injury, and damage to the equipment.

Compatibility
HP television tuner cards with antenna connections should be used only with HP personal computers that are intended for home use.

External television antenna grounding
If an outside antenna or cable system is connected to the product, be sure the antenna or cable system is electrically grounded to protect against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information about proper electrical 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.

Lightning protection
To protect an HP product during a lightning storm or when it will be unattended and unused for long periods of time, unplug the product from the electrical outlet and disconnect the antenna or cable system. This prevents damage to the product due to lightning and power line surges.

Power lines
Do not place an outside antenna system in the vicinity of overhead power lines or other electric light or power circuits, or where it can fall into power lines or circuits. When installing an outside antenna system, take extreme care to avoid touching power lines or circuits, as contact with them could be fatal.

Antenna grounding
This reminder is provided to call the CATV (cable television) system installer’s attention to Section 820-40 of the NEC (National Electrical Code), which 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.

  1. 1. Electric Service Equipment
  2. 2. Power Service Grounding Electrode System (NEC Art 250, Part H)
  3. 3. Ground Clamps
  4. 4. Grounding Conductors (NEC Section 810-21)
  5. 5. Antenna Discharge Unit (NEC Section 810-20)
  6. 6. Ground Clamp
  7. 7. Antenna Lead-in Wire