Eftersom det finns små skillnader beroende på vilken typ av kommunikationssystem vi pratar om, måste vi titta på några olika avsnitt.

NEC 2008

Artikel 800 kommunikationskretsar

800.44 Overhead Communications Wires and Cables.
(A) On Poles and In-Span.
(4) Clearance. Supply service drops of 0–750 volts running above and parallel to communications service drops shall have a minimum separation of 300 mm (12 in.) at any point in the span, including the point of and at their attachment to the building, provided the non-grounded conductors are insulated and that a clearance of not less than 1.0 m (40 in.) is maintained between the two services at the pole.

Artikel 810 Radio- och TV-utrustning

810.13 Avoidance of Contacts with Conductors of Other Systems. Outdoor antennas and lead-in conductors from an antenna to a building shall not cross over open conductors of electric light or power circuits and shall be kept well away from all such circuits so as to avoid the possibility of accidental contact. Where proximity to open electric light or power service conductors of less than 250 volts between conductors cannot be avoided, the installation shall be such as to provide a clearance of at least 600 mm (2 ft). Where practicable, antenna conductors shall be installed so as not to cross under open electric light or power conductors.

Artikel 820 Community Antenn Television och Radio Distribution

820.44 Overhead Coaxial Cables.
(B) Lead-in Clearance. Lead-in or aerial-drop coaxial cables from a pole or other support, including the point of initial attachment to a building or structure, shall be kept away from electric light, power, Class 1, or non–power limited fire alarm circuit conductors so as to avoid the possibility of accidental contact.

Exception: Where proximity to electric light, power, Class 1, or non–power-limited fire alarm circuit service conductors cannot be avoided, the installation shall be such as to provide clearances of not less than 300 mm (12 in.) from light, power, Class 1, or non–power-limited fire alarm circuit service drops. The clearance requirement shall apply at all points along the drop, and it shall increase to 1.02 m (40 in.) at the pole.

Artikel 830 nätverksdrivna bredbandskommunikationssystem

830.44 Aerial Cables.
(C) Lead-in Clearance. Lead-in or aerial-drop network-powered broadband communications cables from a pole or other support, including the point of initial attachment to a building or structure, shall be kept away from electric light, power, Class 1, or non–power-limited fire alarm circuit conductors so as to avoid the possibility of accidental contact.

Exception: Where proximity to electric light, power, Class 1, or non–power-limited fire alarm circuit service conductors cannot be avoided, the installation shall be such as to provide clearances of not less than 300 mm (12 in.) from light, power, Class 1, or non–power-limited fire alarm circuit service drops. The clearance requirement shall apply to all points along the drop, and it shall increase to 1.02 m (40 in.) at the pole.

tl,. Dr

Telefon (Kommunikationssystem)

• 12 "(300 mm) vid vilken punkt som helst.
• 12 "(300 mm) vid fästpunkten.
• 40 "(1 m) vid servicepolen.

Antenn (radio och tv-utrustning)

• Hålls bort om möjligt.
• Bör inte gå över eller under.
• 2 '(600 mm) om närheten inte kan undvikas.

Kabel (Gemenskapens antenn och radio distribution)

• Hålls bort om möjligt.
• 12 "(300 mm) om närheten inte kan undvikas.
• 40 "(1.02 m) vid servicepolen.

Bredband (nätverksdrivna bredbandskommunikationssystem)

• Hålls bort om möjligt.
• 12 "(300 mm) om närheten inte kan undvikas.
• 40 "(1.02 m) vid servicepolen.