after 1 minute of operation.
VAmax—Maximum volt-ampere output after 1 minute of operation
regardless of load and overcurrent protection bypassed if used. 2Overcurrent protection is not required where the current-limiting device provides equivalent current limitation and the current-limiting device does not reset until power or the load is removed.
830.21 Access to Electrical Equipment Behind Panels Designed to Allow Access. Access to electrical equipment shall not be denied by an accumulation of network-powered broadband communications cables that prevents removal of panels, including suspended ceiling panels.
830.24 Mechanical Execution of Work. Network-pow- ered broadband communications circuits and
830.26 Spread of Fire or Products of Combustion. In- stallations of network-powered broadband cables in hollow spaces, vertical shafts, and ventilation or air- handling ducts shall be made so that the possible spread of fire or products of combustion will not be substantially increased. Openings around penetrations of network-powered broadband cables through fire- resistant-rated walls, partitions, floors, or ceilings shall be firestopped using approved methods to maintain the fire resistance rating.
FPN: Directories of electrical construction materials published by qualified testing laboratories contain many listing installation restrictions necessary to maintain the fire-resistive rating of assemblies where penetrations or openings are made. Building codes also contain restrictions on membrane penetrations on opposite sides of a fire resistance-rated wall assembly. An example is the 600-mm (24-in.) minimum horizontal separation that usually applies between boxes installed on opposite sides of the wall. As- sistance in complying with 830.26 can be found in building codes, fire resistance directories, and product listings.
II. Cables Outside and Entering Buildings
830.40 Entrance Cables. Network-powered broadband communications cables located outside and entering buildings shall comply with 830.40(A) and (B).
(A) Medium-Power Circuits. Medium-power network- powered broadband communications circuits located outside and entering buildings shall be installed using Type BMU, Type BM, or Type BMR network-powered broadband communications medium-power cables.
(B) Low-Power Circuits. Low-power network-powered broadband communications circuits located outside and entering buildings shall be installed using Type BLU or Type BLX low-power network-powered broadband communications cables. Cables shown in Table 830.154 shall be permitted to substitute.
Exception: Outdoor community antenna television and radio distribution system coaxial cables installed prior to January 1, 2000, and installed in accordance with Article
820, shall be permitted for low-power-type, network- powered broadband communications circuits.
830.44 Aerial Cables. Aerial network-powered broadband communications cables shall comply with
830.44(A) through (I).
FPN: For additional information regarding overhead wires and cables, see ANSI C2-2007, National Electric Safety Code, Part 2, Safety Rules For Overhead Lines.
(A) On Poles. Where practicable, network-powered broadband communications cables on poles shall be located below the electric light, power, Class 1, or non- power-limited fire alarm circuit conductors and shall not be attached to a crossarm that carries electric light or power conductors.
(B) Climbing Space. The climbing space through network-powered broadband communications cables shall comply with the requirements of 225.14(D).
(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