With the development of the network, as a medium for data
transmission in integrated cabling system, because it has the
advantages of high transmission speed and long distance, optical
fiber is more and more popular. As everyone knows, fiber is not
conductive, it can be free from the impact of current, and the
optical fiber cable also has good protective properties, metal
components in fiber cable is with excellent ground insulation so
lightning current is not easy to enter the optical cable, but since
the fiber optic cable is with strengthen member, especially the
buried fiber cable is with armored layer, so when the optical fiber
cable meets lightning, it may be burned or damaged.
A, for direct buried fiber cable: 1, on the grounding mode: metal
parts in cable joints should be connected, like strengthen member,
moistureproof layer, armored layer of the fiber cable must be
connected. 2, in accordance with the provisions of YDJ14-91,
moistureproof layer, armor layer and strengthen member in optical
fiber cable should be electrically disconnected, not grounded and
insulated, such as can avoid the lightning current accumulation in
the cable and also can be avoided lightning current come into the
optical cable by grounding device due to lightning drain wire and
loop impedance difference of metal components.
B, for overhead optical cable: overhead messenger must be
electrical connected and grounded every 2km, grounding directly or
through a surge protection device which is suitable for grounding.
Such an overhead hanging messenger is with ground wire protection.
C, after the fiber optic cable come into the fiber terminal box,
fiber optic terminal box should be grounded so when the lightning
current come into the metal layer of the fiber cable, terminal box
grounding can quickly release the lightning current and play a
protective role. The direct buried optical cable has armored layer
and reinforced core, and the outer sheath is PE (polyethylene)
sheath, which can effectively prevent corrosion and prevent mouse
bite.
Technical Parameters Of Fiber Optic Termination Box
| Installation method | Wall mounted |
| Fiber capacity | 6, 12, 16, 24 cores |
| Fiber Adapter | SC, ST/FC D type ( round ) , cable |
| Open way | From top cover |
| Total Weight | Less than 1Kg |
| Allowed fiber winding radius | >=40mm |
| Fiber length left in tray | >=1.6m |
| Recommend pigtail | 0.9mm tight buffer |
| Input cable | Diameter < 18mm |
| Enduring of high voltage | 3000V (DC) /5min, no penetration, no arcs. |
| Insulation resistance | ≥1000MΩ between grounding system and metal parts of cabinet,
testing current: DC 500V |
| Thickness of Metal Sheet | 1.0mm to 1.2mm |
| Shock-resistance | 750N |
| Lateral pressure-resistance | 500N |
| Operating temperature | -40℃ ~ +80℃ |
Product Features of Wall Mounted Terminal Box
1, Mini type with small size, easy for transportation and
installation;
2, Suitable for wall mounted;
3, Various adapter type options like SC, LC, ST, FC and so on;
4, Fiber capacity from 4 cores to 24 fibers;
5, Cable entry is enough for normal cable.
6, Customized order is welcome.
Factory Tour:
Our factory is with rich OEM ODM customized service and we are
always ready to help our clients to expand their business and make
more profit, please do not hesitate to contact us for more
information.
