Carlon Structured Cable Management Systems Handbook - Low Res User Manual

Page 57

(b) Class 2 and Class 3 Circuits. Class 1 circuits shall

not be run in the same cable with communica-
tions circuits. Class 2 and Class 3 circuit conduc-
tors shall be permitted in the same cable with
communications circuits, in which case the Class
2 and Class 3 circuits shall be classified as com-
munications circuits and shall meet the require-
ments of this article. The cables shall be listed as
communications cables or multipurpose cables.

Exception: Cables constructed of individually
listed Class 2, Class 3, and communications cables
under a common jacket shall not be required to
be classified as communications cable. The fire-
resistance rating of the composite cable shall
be determined by the performance of the
composite cable.

Fire Alarm, and Medium Power Network-
Powered Broadband Communications Circuits.

(1) In Raceways, Compartments, and Boxes.

Communications conductors shall not be
placed in any raceway, compartment, outlet
box, junction box, or similar fitting with
conductors of electric light, power, Class 1,
nonpower-limited fire alarm or medium power
network-powered broadband communications
circuits.

Exception No. 1: Where all of the conductors of
electric light, power, Class 1, nonpower-limited
fire alarm, and medium power
network-powered broadband communications
circuits are separated from all of the conduc-
tors of communications circuits by a barrier.

Exception No. 2: Power conductors in outlet
boxes, junction boxes, or similar fittings or
compartments where such conductors are
introduced solely for power supply to commu-
nications equipment. The power circuit con-
ductors shall be routed within the enclosure
to maintain a minimum of 0.25-in. (6.35-mm)
separation from the communications circuit
conductors.

Exception No. 3: As permitted by 620.36.

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