equipment, these conductors shall be permitted to be installed as provided in 620.21.
(I) Other Applications. For other applications, conductors of Class 2 and Class 3 circuits shall be separated by at least 50 mm (2 in.) from conductors of any electric light, power, Class 1 non-power- limited fire alarm or medium power network- powered broadband communications circuits unless one of the following conditions is met: (1) Either (a) all of the electric light, power, Class 1, non-power- limited fire alarm and medium-power network- powered broadband communications circuit conductors or (b) all of the Class 2 and Class 3 circuit conductors are in a raceway or in metal-sheathed, metal-clad, non-metallic-sheathed, or Type UF cables.
(2) All of the electric light, power, Class 1 non-power- limited fire alarm, and medium-power network- powered broadband communications circuit conductors are permanently separated from all of the Class 2 and Class 3 circuit conductors by a continuous and firmly fixed nonconductor, such as porcelain tubes or flexible tubing, in addition to the insulation on the conductors.
725.139 Installation of Conductors of Different Circuits in the Same Cable, Enclosure, or Raceway.
(A) Two or More Class 2 Circuits. Conductors of two or more Class 2 circuits shall be permitted within the same cable, enclosure, or raceway.
(B) Two or More Class 3 Circuits. Conductors of two or more Class 3 circuits shall be permitted within the same cable, enclosure, or raceway.
(C) Class 2 Circuits with Class 3 Circuits. Conductors of one or more Class 2 circuits shall be permitted within the same cable, enclosure, or raceway with conductors of Class 3 circuits, provided the insulation of the Class 2 circuit conductors in the cable, enclosure, or raceway is
at least that required for Class 3 circuits.
(D) Class 2 and Class 3 Circuits with Communications
Circuits.
(1) Classified as Communications Circuits. Class 2 and Class 3 circuit conductors shall be permitted in the same cable with communications circuits, in which case the Class 2 and Class 3 circuits shall be classified as communications circuits and shall be installed in accordance with the requirements of Article 800. The cables shall be listed as communications cables.
(2) Composite Cables. Cables constructed of individually listed Class 2, Class 3, and communications cables under a common jacket shall be permitted to be classified as communications cables. The fire resistance rating of the composite cable shall be determined by the performance of the composite cable.
(E) Class 2 or Class 3 Cables with Other Circuit Cables. Jacketed cables of Class 2 or Class 3 circuits shall be permitted in the same enclosure, cable tray, or raceway with jacketed cables of any of the following:
(1) Power-limited fire alarm systems in compliance with Article 760
(2) Nonconductive and conductive optical fiber cables in compliance with Article 770
(3) Communications circuits in compliance with Article
800
(4) Community antenna television and radio
distribution systems in compliance with Article 820
(5) Low-power, network-powered broadband communications in compliance with Article 830