Foam-Skin Polyethylene Insulated Jelly Filled Moisture Barrier Sheathed Local Cables
FS-JF-LAP
This cable is used for junction or subscriber distribution network in local exchange area
and usually direct burial or underground (duct) application. The cable is insulated full
color coding with an extruded foam-skin insulating high-density polyethylene
compound in the air space to water resistant filling compound.
- Conductor: Solid annealed copper wire in size 0.4mm to 0.9mm.
- Insulation: Foam-skin polyethylene.
- Quadding: Four insulated conductors are twisted into a star quad.
- Unit:
(1) 200 pairs and less: Five quads shall be stranded into a 10 pair unit, and binding with color tape. The units are stranded into a compact and circular cable core according to specification.
(2) 300 pairs and more: Five 10 pair unit shall be stranded into a 50 pair super-unit, and binding with color tape. The super-units are stranded into a compact and circular cable core according to specification. - Core Wrapping: A Non-hygroscopic tape.
- Filling compound: Water resistant filling compound.
- LAP Sheath: The copolymer coated aluminum screen is longitudinally folded around the cable core and sealed at the overlap during extrusion of polyethylene outer sheath.
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Electrical Characteristics at 20℃ |
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Item\Conductor Diameter(mm) |
0.4 |
0.5 |
0.65 |
0.9 |
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Conductor Resistance(Ω/km) |
Normal value |
139.0 |
88.7 |
52.5 |
27.4 |
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Max value |
147.5 |
93.5 |
56.5 |
29.0 |
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Min. Insulation Resistance (MΩ/km) |
5000 |
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Mutual Capacitance(1KHz) nF/km |
50pairs and more |
Average value: ≦55 |
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30pairs and less |
Average value: ≦60 |
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Dielectric Strength(V/min) |
Conductor-earth |
DC 500/1 or AC 350/1 |
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Near-End Crosstalk Loss(40KHz) |
L≧300m |
(a)Each unit min, Value= 50dB Each unit second min. Value= 58.5dB (b) All unit min. mean value=62dB (c)Total mean Value of any reel=66dB |
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L＜300m |
α: Attenuation in nepers per unit length(Neper/m) Lx: 300M L0: Value for reference length(m) Nx: Value for new length of near end crosstalk loss(dB) N0: Value for reference length of near end crosstalk loss (dB) e: 2.71828 |
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Far-End Crosstalk Loss(160KHz) |
L=1000m |
(a) m-1.28xS:55dB/Km (b) Individual min. value:38dB/Km Where m:mean value s:standard deviation |
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L≠1000m |
Lx=1000M Lo: Test length (m) Fx: Value for new length of far end crosstalk loss(dB) Fo: Value for reference length of far end crosstalk loss (dB) |
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