electric light, power, Class 1, or non-power- limited fire alarm circuit conductors so as to avoid the possibility of accidental contact.
Exception: Where proximity to electric light, power, Class 1, or non-power-limited fire alarm circuit service conductors cannot be avoided, the installation shall be such as to provide clearances of not less than 300 mm (12 in.) from light, power, Class 1, or non-power-limited fire alarm circuit service drops. The clearance requirement shall apply to all points along the drop, and it shall increase to 1.02 m (40 in.) at the pole.
(D) Clearance from Ground. Overhead spans of network-powered broadband communication cables shall conform to not less than the following:
(1) 2.9 m (9.5 ft) — above finished grade, sidewalks, or from any platform or projection from which they might be reached and accessible to pedestrians only
(2) 3.5 m (11.5 ft) — over residential property and driveways, and those commercial areas not subject to truck traffic
(3) 4.7 m (15.5 ft) — over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other land
traversed by vehicles such as cultivated, grazing, forest, and orchard
FPN: These clearances have been specifically chosen to correlate with ANSI C2-2007, National Electrical Safety Code, Table 232-1, which provides for clearances of wires, conductors, and cables above ground and roadways, rather than using the clearances referenced in 225.18. Because Article 800 and Article 820 have had no
required clearances, the communications industry has used the clearances from the NESC for their installed cable plant.
(E) Over Pools. Clearance of network-powered broadband communications cable in any direction from the water level, edge of pool, base of diving platform, or anchored raft shall comply with those clearances in
680.8.
(F) Above Roofs. Network-powered broadband communi cations cables shall have a vertical clearance of not less than 2.5 m (8 ft) from all points of roofs above which they pass.
Exception No. 1: Auxiliary buildings such as garages and the like.
Exception No. 2: A reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (J) not more than 1.2 m (4 ft) of the broadband communications drop cables pass above the roof overhang, and (2) they are terminated at a through-the-roof raceway or support.
Exception No. 3: Where the roof has a slope of not less than 100 mm in 300 mm (4 in. in 12 in.), a reduction in clearance to not less than 900 mm (3 ft) shall be permitted.
(G) Final Spans. Final spans of network-powered broad band communications cables without an outer jacket shall be permitted to be attached to the building, but they shall be kept not less than 900 mm (3 ft) from windows that are designed to be opened, doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.
Exception: Conductors run above the top level of a win- dow shall be permitted to be less than the 900-mm (3- ft) requirement above.
Overhead network-powered broadband communications cables shall