GYTA53 Direct Burial Fiber Optic Cable | Double Armored Cable

GYTA53 Double-Sheath Armored Cable for Direct Burial

GYTA53 is a stranded loose tube outdoor fiber optic cable designed for direct-burial, underground and mechanically demanding network routes. Its layered construction combines an aluminum-polyethylene laminate moisture barrier, an inner PE sheath, corrugated steel tape armor and a black PE outer sheath.

Compared with standard GYTA cable, GYTA53 adds an inner sheath and steel tape armor. This provides greater crush resistance, moisture protection and mechanical separation between the cable core and the surrounding installation environment.

Reference configurations are available from 4 to 144 fibers. Fiber type, cable diameter, drum length, jacket marking, testing and project-specific construction should be confirmed before quotation.

What Is a GYTA53 Fiber Optic Cable?

GYTA53 is a double-sheath, steel-tape-armored optical cable with a stranded loose tube core. The optical fibers are placed inside gel-filled loose tubes, which are stranded around a metallic central strength member together with filler elements where required.

An aluminum-polyethylene laminate, commonly abbreviated as APL, is applied around the water-blocked cable core. A polyethylene inner sheath is then extruded over the APL layer. Corrugated steel tape is applied outside the inner sheath, followed by a final black polyethylene outer sheath.

This layered structure gives GYTA53 greater mechanical protection than a standard single-sheath GYTA cable. It is normally selected when a cable must be installed underground or in a route where soil pressure, localized impact, crushing or other mechanical exposure must be considered.

GYTA53 Cable Construction

250 μm Optical Fibers

Single-mode or multimode optical fibers are selected according to the transmission system, network standard and required link performance. The exact fiber grade must be confirmed in the order specification.

Gel-Filled Loose Tubes

The optical fibers are placed inside high-modulus plastic loose tubes. Filling compound inside the tubes protects the fibers and helps limit moisture movement around the optical elements.

Metallic Central Strength Member

A metallic strength member is positioned at the center of the cable core. In certain high-fiber-count constructions, a polyethylene layer may be applied around the strength member to achieve the required cable-core dimensions.

Stranded Loose Tube Cable Core

Loose tubes and filler elements are stranded around the central strength member to form a stable, compact and circular cable core. The arrangement varies with the required fiber count and the number of fibers placed in each tube.

Cable-Core Water Blocking

The spaces within the stranded cable core are filled or otherwise water blocked to reduce longitudinal moisture migration. The exact filling and water-blocking method should be stated in the approved cable specification.

APL Moisture Barrier

An aluminum-polyethylene laminate is applied longitudinally around the cable core. This layer provides an additional moisture barrier beneath the inner polyethylene sheath.

PE Inner Sheath

The polyethylene inner sheath covers the APL-protected cable core and creates a protective separation layer beneath the steel tape armor.

Corrugated Steel Tape Armor

Corrugated steel tape is applied around the inner sheath to increase crush resistance and mechanical protection. The steel tape provides protection, but the final cable should still be selected according to soil conditions, installation depth and project requirements.

Black PE Outer Sheath

The outer polyethylene sheath protects the steel armor and internal cable structure against moisture, soil contact, normal outdoor weather and installation handling.

GYTA53 Fiber Optic Cable Features

• Stranded loose tube structure for stable fiber protection

• Gel-filled loose tubes to protect the optical fibers

• Water-blocked cable core for outdoor and underground routes

• APL aluminum-polyethylene laminate moisture barrier

• Separate PE inner sheath beneath the steel armor

• Corrugated steel tape for increased crush and mechanical protection

• Black PE outer sheath for underground and outdoor environments

• Compact cable-core design to maintain stable loose-tube positioning

• Reference fiber counts from 4 to 144 fibers

• Custom fiber type, drum length, cable marking and packing options

Where Is GYTA53 Cable Used?

Direct-Burial Fiber Networks

GYTA53 is commonly selected for direct-burial routes where the cable is installed in prepared trenches and requires greater mechanical protection than a standard duct cable.

Underground Telecom Backbones

The double-sheath armored construction can support metropolitan, access and long-distance outdoor communication routes between network facilities and distribution points.

Campus and Industrial Networks

GYTA53 can be used for underground links between buildings, communication rooms, production areas and outdoor distribution locations where cable protection is an important selection factor.

Utility and Infrastructure Projects

The cable may be considered for protected communication routes within utility, transportation and infrastructure projects, subject to the required cable specification and installation conditions.

Routes with Increased Mechanical Exposure

The corrugated steel tape armor provides additional protection in routes where the cable may be exposed to soil pressure, localized crushing or installation-related mechanical contact.

Important: GYTA53 is not a self-supporting aerial cable. For self-supporting overhead routes, review a suitable ADSS or figure-8 cable from our fiber optic cable range.

GYTA53 Fiber Optic Cable Specifications

D represents the nominal cable diameter. The listed values are reference configurations based on the available product data. Final cable diameter, weight, tube arrangement, armor construction and mechanical performance must be confirmed against the approved manufacturing specification.

Reference Operating Conditions

• Storage temperature: -40°C to +70°C

• Operating temperature: -40°C to +70°C

• Static minimum bend radius: 15 times the nominal cable diameter

• Dynamic minimum bend radius: 30 times the nominal cable diameter

• Reference long-term tensile load: 1000 N

• Reference short-term tensile load: 3000 N

• Reference long-term crush load: 1000 N/100 mm

• Reference short-term crush load: 3000 N/100 mm

The values above should not replace the approved project datasheet. Installation temperature, pulling load, burial depth, soil conditions and route protection must be reviewed before installation.

Available Fiber and Cable Options

Optical Fiber Type

Available fiber directions may include G.652.D, G.657.A1, G.657.A2, G.655 and applicable multimode fibers. Availability must be confirmed against the required fiber count and cable construction.

Fiber Count

Reference configurations include 4, 12, 24, 48, 96 and 144 fibers. Other fiber counts can be reviewed according to the required number of fibers per tube, loose-tube arrangement and cable diameter.

Outer Sheath and Cable Marking

The standard sheath direction is black polyethylene. Approved jacket marking can include the cable model, fiber count, production year, sequential meter marking and customer-specific identification.

Drum Length

Standard and project-specific drum lengths can be reviewed according to cable diameter, production length, transportation method and installation plan.

OEM Packing

Wooden drums, protective wrapping, labels, inspection records and shipping marks can be configured according to the order and delivery destination. Review our OEM fiber optic cable capabilities for project-specific production requirements.

GYTA53 vs GYTA and GYTS

The correct cable should be selected from the installation route rather than the model name alone. Soil condition, conduit availability, pulling tension, crush exposure, water conditions and required service life all affect the final choice.

GYTA53 Testing and Quality Control

The inspection plan should follow the approved cable specification and project requirements. Available inspections may include:

• Optical attenuation at the specified wavelengths

• Optical fiber and loose-tube color sequence

• Cable construction and outside-diameter verification

• Loose-tube arrangement and filler count

• Central strength member verification

• Water-blocking material inspection

• APL application and overlap inspection

• PE inner-sheath thickness and appearance

• Steel-tape thickness, corrugation and overlap

• PE outer-sheath thickness, marking and surface inspection

• Tensile and crush performance testing

• Bending and temperature-cycle testing

• Water-penetration testing where specified

• Cable length, drum and packing inspection

Production and testing can be specified with reference to applicable YD/T 901 and relevant IEC 60794 series requirements. The standard edition, test methods and required documentation should be confirmed in the quotation and order specification.

Information Required for a GYTA53 Cable Quote

Provide as much of the following information as possible:

• Installation route and burial conditions

• Required fiber type and fiber count

• Required cable diameter or existing cable reference

• Length per drum and total project length

• Maximum pulling load and crush requirements

• Operating and installation temperature

• Burial depth, soil condition and additional route protection

• Jacket printing and sequential meter marking

• Testing, certification and inspection-document requirements

• Packing method, destination and required delivery date

A photograph, cable marking, drawing, sample or existing specification can be used when the full cable configuration is not yet available. Contact GK Fiberoptic to review the product and order requirements.

GYTA53 Fiber Optic Cable FAQs

What is GYTA53 fiber optic cable?

GYTA53 is a stranded loose tube outdoor fiber optic cable with an APL moisture barrier, PE inner sheath, corrugated steel tape armor and PE outer sheath. Its double-sheath armored structure is used for underground and direct-burial routes requiring greater mechanical protection.

What is the difference between GYTA and GYTA53?

GYTA normally has an APL moisture barrier and a single PE outer sheath. GYTA53 adds a PE inner sheath, corrugated steel tape armor and a second PE outer sheath, providing greater crush and underground protection.

Is GYTA53 suitable for direct burial?

GYTA53 is commonly selected for direct-burial routes. Final suitability still depends on burial depth, soil condition, water exposure, mechanical load and the confirmed cable construction.

Is GYTA53 a self-supporting aerial cable?

No. GYTA53 does not contain the supporting structure required for a self-supporting aerial span. ADSS or another purpose-designed aerial cable should be evaluated for unsupported overhead installation.

What fiber counts are available?

The reference range includes 4, 12, 24, 48, 96 and 144 fibers. Other counts may be available after confirming the loose-tube arrangement, cable diameter and production requirements.

Which optical fiber types can be used?

Fiber options may include G.652.D, G.657.A1, G.657.A2, G.655 and applicable multimode fibers. The selected fiber must match the transmission equipment and network specification.

Does steel tape make GYTA53 rodent-proof?

The steel tape provides increased mechanical protection and may reduce damage from some external contact. It should not be described as completely rodent-proof unless the complete construction has been tested and specified for that requirement.

Can the cable marking and drum length be customized?

Yes. Jacket marking, sequential meter marking, drum length, labels and packing can be reviewed according to the order quantity and approved production specification.

What should be confirmed before ordering?

Confirm the installation route, fiber type, fiber count, cable construction, mechanical requirements, length per drum, total quantity, testing scope, marking, packing and delivery destination before production.

Request a GYTA53 Cable Configuration

Send the installation route, fiber count, drum length, total quantity, mechanical requirements and delivery destination. GK Fiberoptic can review the required construction, available production direction, testing scope and quotation basis.

Discuss your GYTA53 cable requirement or browse more outdoor and armored fiber optic cables.