Mechanical closure / BlackBox 2L
Description
Splicing closure - underground & outdoor
- Innovative concept with 3 sealings
- Bringing innovative implementation
- Patented
- Ultra compact and designed for multiple openings
- Underground or outdoor version
Description
Splicing closure - underground & outdoor
- Innovative concept with 3 sealings
- Bringing innovative implementation
- Patented
- Ultra compact and designed for multiple openings
- Underground or outdoor version
Standards
International : Nexans specificationDescription
In the context of FFTH deployment, the BlackBox closure is used as an Optical Branch Point. Designed for Straight or Butt Mid-Span installation onto a distribution cable-either crossing or terminating, the closure ensures protection of optical cables splices in undergroung works.
Midspan techniques and extraction techniques are well known to bring progressive deployments of optical and FTTH networks. A main cable is laid down, underground, while offering a possible later fiber connection in manholes towards the access network. Thanks to its 4 midspan ports, 2 windows of the same extraction cable can be done, allowing cutting and extracting at the same time in the same closure. These features bring great capex savings.
Main functions
1/ Protect the fibres
- Ensure the fibre radius
- Protect the fibres and the splices
2/ (Re)Protect the cables
- Re-protect the main cables
- Fix the main cables and distributed cables
3/ (Re)seal
4/ Frequent opening
Design
The closure is equipped with a body and a cover closed by 4 draw latches. The main cable is prepared on a removable plate which is in turn fastened at the rear of the closure. Mechanical tightness is perform using a double rubber seal and varions lenghts of sealant applied on the main cable depending on their diameter. The branch cables come out of the closure through 4 mechanical tightening ports, each port having the capacity to host one or several cables (see table of sealing kits). The body is equipped with a valve allowing a pressurization after installation to check tightness. Closure is provided with an organizer ensuring up to 72 OF for G657 fiber (with fiber-to-fiber management) or up to 24 OF for G652 fiber.
Characteristics
| Construction characteristics | |
|---|---|
| Colour | Black |
| Material | Thermoplastic |
| Dimensional characteristics | |
| Diameter main cable | 4 .. 15mm |
| Height | 80mm |
| Length | 202mm |
| Width | 195mm |
| Mechanical characteristics | |
| IK Rating | 9 |
| Usage characteristics | |
| Installation type | Outdoor |
| Operating temperature, range | -20 .. 60°C |
| U.V resistance | Yes |
| Watertightness | IP 68 |
| Number of ports | 8 |
| Packaging | Box |
| RoHS compliant | Yes |
| Specific characteristics | |
| See all products | |
| |
Products and services
Docs and info
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Product usage
Standard midspan
The cable is stripped. The fibers are coiled in the closure. One fiber is selected and spliced
Standard extraction
Two windows are made at 2 different places. One fiber is cut at one place and extracted at the other place
Double window extraction
The same cable is installed twice in the same closure. Thus 2 windows can be at once, allowing the cut the right fibre in the first window and extract is from the second window. This fibre can then be spliced.
3-sealing concept
The main cable is installed onto a plate, which is then fixed at the rear of the closure, normally not removed.
The cover, once removed, brings a large access to fibers, as many times as needed.
The cables are fixed inside and sealed with 4 glands. Each gland can receive several cables, depending on the diameter.
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Tightness range table
