Like fiber optic cable, fiber optic splice closure is also an important equipment that widely used in fiber optic telecommunication system. Specifically speaking, a fiber optic splice closure or fiber splice closure is an equipment used to offer room for fusion splicing optical fibers in outdoor fiber optic cable. A fiber splice tray is needed together to protect the fused fiber joint and fiber cables from outside plant environment including aerial, direct burial and underground/manhole installations.

There are mainly two types of fiber optic closures: vertical type and horizontal type.
Horizontal Fiber Optic Splice Closure looks like flat or cylindrical case and can be mounted aerial, direct buried or installed underground. This type provide fire resistant, waterproof and quakeproof for splices with operating temperature ranging from -40°C to +65°C and pressure up to 106kpa. The external component and fastening piece are often made from the high-quality stainless steel or high tensile construction plastic.
Vertical Fiber Optic Splice Closure or dome type fiber splice closure share the same specification with horizontal types. But the main application for vertical fiber optic splice closure is in CATV, telecommunications and fiber optic networks and mainly used for protecting optical fiber splices in straight through and branching applications.

Before show steps of fiber closure installation, we need to know the components in the fiber optic splice closure:
The following parts are usually included in a fiber optic splice closure kit: End plate, splice tray organizer, fiber splice tray (used for storing optical fibers), cover (a cylindrical plastic enclosure with corrosion resistant metal hardware), cable grommets, grommet retainer, mounting bracket and misc. hardware.

Here comes the concise guide on how to install Fiber Optic Splice Closure.
1. Fiber Cable Sheath Preparation
Expose the rip cord. Mark the location with a tape marker, ring-cut the outer jacket with a sharp knife, remove the corrugated armor if applicable, and then shave off the outer jacket to expose the rip cord.
Remove the outer sheath. By making a longitudinal slit down the outer sheath, peeling off the outer jacket and corrugated metal, and cutting the rip cord flush with the end of the corrugated metal. Remove the inner jacket. Use the rip cord under the inner jacket to slit it, cutting aramid yarns, cutting central strength member, and cleaning the filling compound.
2. Bonding and Grounding Hardware Installation
This step involves sliding the cable clamp over sheath, sliding the bond shoe under the corrugated metal, placing the bond plate over the bond shoe and securing the sheath grip.
3. Assembly of Cables to Closure
A fiber optic splice closure is usually designed for two cables in each of its two ports. Preferable location for the two main cables is in the lower end plate port. Third or fourth cable is to install in the upper end plate port as a branch cable.
Install Cables to End Plate. This step involves unscrewing knob and removing grommet retainer, positioning the end plate assembly, attaching the sheath grip to dielectric cables, sliding cables and sheath grip through, and securing sheath grip to backbone.
Install Cables to End Plate. This step involves unscrewing knob and removing grommet retainer, positioning the end plate assembly, attaching the sheath grip to dielectric cables, sliding cables and sheath grip through, and securing sheath grip to backbone.
Fiber Unit Preparation and Distribution Organizer installation.This step involves removing more loose tubes, separating each cable's loose tube into two groups, positioning the distribution organizer, securing the loose tubes to the distribution organizer, and securing the loose tubes.
Splice Tray Installation. This step involves placing the splice tray, fastening the end of the splice tray to the organizer, and installing cables, grommets and external ground. Optical Fiber Splicing. This step involves splicing holder placing, fiber splicing and fastening the splice holder lid.
4. Fiber Optic Splice Closure Cover Installation
In this step, you need to clean the grooves in the cover, slide the closure assembly into the cover, rotate the cover until the key aligns with the end plate notch, seat the cover and secure the five latches. Additionally, test the flash pressure if it is required.
5. Closure Mounting
In this step, Mounting Bracket Kit and Mounting Bracket Kit are available for mounting the closure. The closure should be completely assembled before performing any mounting procedure.
6. Reentry
Before reassembling the closure, following jobs are needed: Clean the closure surface to remove dirt and debris, orient the closure such that residual debris will not fall into the splice tray when the cover is removed, unfasten the five latches, slide the closure cover off and then set the O-ring aside for cleaning before reassembly and finish other necessary work done.
Here is the brief introduction on what’s fiber optic slice closure, types of fiber optic closure, and how to terminate it. Generally, fiber optic closure can divided in to different types according to the number of inlet/outlet ports and the fitting fiber optic core numbers. Both vertical type and horizontal fiber optic slice closure comes in 1inlet/outlet ports, 2inlet/outlet ports, 3inlet/outlet ports types, together with 12, 24, 36, 48, 72 fiber optic cores. If you are source related fiber optic product, you can go to Ingellen.com, among the top China fiber optic closure, and other related fiber optic product manufacturers.