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Flashcards in PEC CHAPTER 8 COMMUNICATION SYSTEMS Deck (8):
1

COMMUNICATION CIRCUITS

Wires and Cables Outside of the Building (Clearance):

On Poles and In-Span - Supply service drops of _______V running above and parallel to communications service drops shall have a minimum separation of________(mm) at any point in the span, including the point of and at their attachment to the building.

0-750 volts

300 mm

2

COMMUNICATION CIRCUITS

Wires and Cables Outside of the Building (Clearance):

Above Roofs - Shall have a vertical clearance of not less than______(mm) from all points of the roof which they pass.

2500 mm

3

COMMUNICATION CIRCUITS

Wires and Cables Outside of the Building (Clearance):

Lighting Conductors - A separation of at least ______(mm) shall be between communications wires and cables on buildings and lightning conductors

1800 mm

4

RADIO AND TELEVISION EQUIPMENT

Clearances - Receiving Stations

Outside of Buildings - Lead-in conductors attached to buildings shall be installed so that they cannot swing closer than ______(mm) to the conductors of circuits of ______V or less between conductors, or _____(mm) to the conductors of circuits of over _____V between conductors, except that in the case of circuits not over ___V between conductors, where all conductors involved are supported so as to ensure permanent separation, the clearance shall be permitted to be reduced but shall not be less than ____(mm).

600 mm

250V

3000 mm

250V

150V

100 mm

5

RADIO AND TELEVISION EQUIPMENT

Clearances - Receiving Stations

From Lighting Rod Systems - The clearance shall not be less than______(mm)

1800 mm

6

RADIO AND TELEVISION EQUIPMENT

Clearances - Receiving Stations

Underground Conductors - Shall be separated at least _____(mm) from conductors of any light or power circuits or Class 1 circuits.

300 mm

7

RADIO AND TELEVISION EQUIPMENT

Clearances - Receiving Stations

Antennas and Lead-ins (Indoors) - Shall not be run nearer than ___(mm) to conductors of other wiring systems in the premises.

50 mm

8

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