PEC CHAPTER 8 COMMUNICATION SYSTEMS Flashcards
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
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
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
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
RADIO AND TELEVISION EQUIPMENT
Clearances - Receiving Stations
From Lighting Rod Systems - The clearance shall not be less than______(mm)
1800 mm
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
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
.
.
