General

What is a Fiber Optic Splice Closure?

Fiber optic splice closure is the equipment used to offer room for fusion splicing optical fibers. It also provides protection for fused fiber joint point and fiber cables. There are mainly two types of closures: vertical type and horizontal type. A large variety of fiber splice closures are designed for different applications, such as aerial, duct fiber cables and direct burial. Generally speaking, they are usually used in outdoor environment, even underwater.

:: Fiber Optic Splice Closure Types

For outside plant splice closure, there are two major types: horizontal type and vertical type.

1) Horizontal type

Horizontal type splice closures look like flat or cylindrical case. They provide space and protection for optical cable splicing and joint. They can be mounted aerial, buried, or for underground applications. Horizontal types are used more often than vertical type (dome type) closures.

Most horizontal fiber closure can accommodate hundreds of fiber connections. They are designed to be waterproof and dust proof. They can be used in temperature ranging from -40°C to 85°C and can accommodate up to 106 kpa pressure. The cases are usually made of high tensile construction plastic.

2) Vertical Type

Vertical type of fiber optic splice closures looks like a dome, thus they are also called dome types. They meet the same specification as the horizontal types. They are designed for buried applications.

:: Applications

Splice closures provide room for splicing outdoor fiber cables together. Fiber splice trays are needed too. They provide the perfect protection for outside plant fiber cable joints.fiber engineering

Fiber splice closures accept both ribbon and round fiber cables. Each type (ribbon or round cable) fits respective requirement of different fiber splicing counts. They are widely used in optic telecommunication systems.

:: Fiber Optic Splice Closure Installation Steps

Here I will outline the main steps involved in fiber closure installation.

1. Components in the closure

Fiber optic splice closure kit usually includes: end plate, splice tray organizer, fiber splice tray, cover, cable grommets, grommet retainer, mounting bracket and misc. hardware.

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