of conductors and the number of cables shall be as indicated.
Conductors
larger than No. 8 AWG shall be stranded.
2.3.2
Messenger Cable
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NOTE: Include this paragraph only for aerial cable.
The designer will coordinate with the site to
determine acceptable locations and heights for
aerial cables. For security reasons, aerial cables
shall not cross perimeter fencing.
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A messenger cable system to support aerial cable shall be furnished. The
messenger system shall include guys, hardware and appurtenances needed to
install the messenger cable. The messenger system shall be capable of
supporting the weight of the lighting system cable with the required
messenger cable tensioning without exceeding 30 percent of its breaking
strength under 16 degrees C 60 degrees F conditions of no ice and no wind.
The messenger shall be sized so that ice and wind loading normally
encountered at the site does not cause the messenger to exceed 50 percent
of its breaking strength. Appurtenances, guys, and hardware shall be sized
to exceed the rated breaking strength of the messenger cable. Messenger
cables shall be galvanized zinc coated steel or aluminum clad steel.
2.3.3
Bare Copper Conductors
Medium-hard-drawn copper conductors shall conform to ASTM B 2 and ASTM B 8.
2.4
AERIAL CABLE HARDWARE
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NOTE: Include this paragraph only when aerial cable
is being used.
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Zinc coated aerial cable hardware shall conform to IEEE C135.1 and ANSI
C135.14. Steel hardware material shall conform to ASTM A 575 and ASTM A 576.
Hardware shall be hot-dip galvanized in accordance with ASTM A 153/A 153M.
2.5
CABLE SPLICES AND CONNECTORS
Cable splices and connectors shall conform to UL 486A-486B. Underground
splices and connectors shall also conform to the requirements of ANSI C119.1.
2.6
CABLE BOXES
Boxes and covers shall be made of cast iron with zinc coated or aluminized
finish, and shall be of the sizes indicated on drawings. The minimum
inside dimensions shall be not less than 304.8 mm 12 inches square by 152.4
mm 6 inches deep and not less than required to house the cable splice. A
suitable gasket shall be installed between the box and cover for
watertightness. A sufficient number of screws shall be installed to hold
the cover in place along the entire surface of contact. Grounding lugs
shall be provided.
2.7
MANHOLES, HANDHOLES, AND PULLBOXES
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SECTION 16528A
Page 18
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