other system components for terminations to the fiber. Splices shall be
made using the method recommended by the cable manufacturer. Splices shall
be housed in a splice enclosure and shall be encapsulated with an epoxy,
ultraviolet light cured splice encapsulant or otherwise protected against
infiltration of moisture or contaminants. FO splices shall be field tested
at the time of splicing. Fusion splices shall have nominal splice loss of
[0.15] [_____] dB for multimode and for single mode cable fusion splices
and shall have maximum fusion splice loss not more than 0.3 dB loss.
3.1.6.2
Mechanical Splices
Mechanical splices shall have nominal splice loss of [0.15] [_____] for
multimode fiber mechanical splices and [0.2] [_____] dB for single mode
fiber mechanical splices and shall have maximum mechanical splice loss not
more than [0.3] [_____] dB loss for multimode and for single mode fiber
mechanical splices. There shall be no more than 1 splice per km 0.62 mile
in any of the FO cables excluding terminations. Field splices shall be
located in cable boxes. Sufficient cable shall be provided in each
splicing location to properly rack and splice the cables, and to provide
extra cable for additional splices. Cable ends shall be protected with end
caps except during actual splicing. During the splicing operations, means
shall be provided to protect the unspliced portions of the cable and its
fibers from the intrusion of moisture and other foreign matter.
3.1.7
Connectors
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NOTE: Maximum connector pair losses per
ANSI/TIA/EIA-568B are provided in the first
bracketed entry and are considered larger than
connector pair losses that can be achieved by many
manufacturers and installers. The designer will
specify lesser loss values when the design and link
loss budget requires lesser values. The designer
will confirm with two manufacturers minimum, that
the lesser connector pair loss value can be achieved
for the connector type and fiber (i.e., multimode or
single mode) type.
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Prior to and during installation of connectors, appropriate cleaning should
be performed to ensure that any contaminant particulates larger than 0.06
micron in size are removed. Connectors shall be as specified in paragraph
FO CONNECTORS. Connectors or splices which leave residue on the connector
ferrule or optical connector "lens", are not permitted. Fibers at each end
of the cable shall have jumpers or pigtails installed of not less than 1
meter 3 feet in length. Fibers at both ends of the cable shall have
connectors installed on the jumpers. The mated connector pair loss shall
not exceed [0.75] [_____] dB. The pull strength between the connector and
the attached fiber shall not be less than 22.7 kg 50 pounds.
3.1.8
Identification and Labeling
Identification tags or labels shall be provided for each cable. Markers,
tags and labels shall use indelible ink or etching which will not fade in
sunlight, or in buried or underground applications. Markers, tags, and
labels shall not become brittle or deteriorate for a period of 20 years due
to moisture, sunlight, soil minerals, chemicals or other environmental
elements. Label all termination blocks and panels with cable number or
SECTION 16768A
Page 36
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