Bose Acoustic Wave music system II. Manuale d'uso - Pagina 4

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Important Safety Instructions

18. Use proper power sources – Plug the product into

a proper power source, as described in the operating

instructions or as marked on the product.

19. Avoid power lines – Use extreme care when install-

ing an outside antenna system to keep from touching

power lines or circuits, as contact with them may be

fatal. Do not install external antennas near overhead

power lines or other electric light or power circuits, nor

where an antenna can fall into such circuits or power

lines.

20. Ground all outdoor antennas – If an external

antenna or cable system is connected to this product,

be sure the antenna or cable system is grounded. This

will provide some protection against voltage surges

and built-up static charges.

Section 810 of the National Electrical Code ANSI/

NFPA No. 70 provides information with respect to

proper grounding of the mast and supporting struc-

ture, grounding of the lead-in wire to an antenna dis-

charge unit, size of grounding conductors, location of

antenna-discharge unit, connection to grounding elec-

trodes, and requirements for the ground electrode.

Refer to the antenna grounding illustration on this

page.

Antenna grounding

Example of antenna grounding as per National Electrical

Code, ANSI/NFPA 70.

Ground clamp

Electric service

equipment

Note to CATV system installer

This reminder is provided to call the CATV system

installer's attention to Article 820-40 of the NEC (of USA)

that provides guidelines for proper grounding. In particular,

it specifies that the cable ground shall be connected to the

grounding system of the building, as close to the point of

cable entry as is practical.

Antenna lead-in wire

Antenna discharge unit!

(NEC Section 810-20)

Grounding conductors!

(NEC Section 810-21)

Ground clamps

Power service grounding electrode

system (NEC ART 250, Part H)