AGL Joint / Splice Kit for Airfield Lighting Cable
A protected, sealed field connection that keeps the series circuit continuous
AGL Joint / Splice Kits provide a protected and reliable field connection between sections of airfield lighting cable in series-circuit installations. The assembly restores electrical continuity while providing mechanical protection and environmental sealing. Precision AGL Solutions supplies kits selected for cable construction, conductor arrangement, voltage class, installation environment, jointing method and project requirements.
Joint / Splice Kit
Proper joint selection is essential for the integrity of the airfield lighting circuit, particularly where primary cable sections are extended, repaired, replaced or modified during construction and rehabilitation. The complete joint assembly may include the required connection, insulation, sealing, mechanical protection and installation components, depending on the configuration.
The jointing system must be selected and installed as a complete assembly. Avoid mixing components from incompatible cable or jointing systems unless compatibility has been technically established.
Where Joint / Splice Kits Are Used
Typical circuits include runway, taxiway, approach, apron and other series-circuit lighting where primary cable continuity must be maintained.
Function in an AGL Series Circuit
Primary cable runs may extend over significant distances and can need field joints because of installation, maintenance, repair or infrastructure changes. The kit provides a controlled connection between compatible cable sections. The completed joint should provide:
- Electrical continuity between cable sections
- Suitable insulation of the connection
- Protection against moisture and environmental contamination
- Mechanical protection of the joint area
- Compatibility with the installed cable construction
- Reliable long-term performance when correctly installed
- A maintainable installation suited to airport operations
Primary Cable Compatibility
Cable compatibility is one of the most important factors in selecting a splice kit. Selection may depend on:
- Cable construction
- Conductor size and material
- Insulation system
- Cable outside diameter
- Voltage class
- Screen or shield construction, where applicable
- Armour or protective construction, where applicable
- Existing cable condition
- Installation environment
- Required jointing technique
Match the kit to the actual cable installed at site, not just the nominal cable name or circuit voltage. For replacement and rehabilitation, confirm the existing cable construction before ordering.
Joint / Splice Construction
Depending on the configuration, a joint assembly may incorporate several functional elements.
Specification
| Parameter | Specification |
|---|---|
| Product Type | AGL Joint / Splice Kit |
| Application | Primary airfield lighting cable joints and repairs |
| Cable Type | Compatible AGL primary cable |
| Cable Compatibility | Model/project-specific |
| Voltage Class | Configuration-specific (FAA L-824 primary cable is 5 kV class) |
| Conductor Range | Model-specific |
| Conductor Material | Compatible with selected cable construction |
| Cable Diameter Range | Model-specific |
| Jointing Method | Manufacturer/configuration-specific |
| Electrical Connection | According to selected splice system |
| Insulation System | Configuration-specific |
| Sealing System | Environmental sealing according to kit design |
| Joint Dimensions | Model-specific |
| Installation Method | Manufacturer-specified |
| Environmental Protection | Application-specific |
| Installation Location | Suitable AGL cable installation environment |
| Operating Conditions | Project/application-specific |
| Kit Contents | Configuration-specific |
| Service Life | Dependent on product, installation and environmental conditions |
Note: Exact conductor range, cable diameter range, dimensions, voltage classification, jointing method and kit contents should be confirmed against the selected manufacturer's configuration and project requirements.
Selecting a Joint / Splice Kit
Before selecting a kit, work through the following:
- Identify the existing or proposed primary cable type.
- Confirm the cable construction.
- Confirm conductor size and material.
- Confirm the cable outside diameter.
- Confirm the circuit voltage/classification.
- Determine whether the application is a new joint, repair, extension or replacement.
- Confirm the installation environment.
- Identify any requirements for mechanical protection or additional sealing.
- Confirm the required joint dimensions and available installation space.
- Select a compatible joint / splice kit.
- Verify the kit contents before installation.
For existing installations, a cable sample, manufacturer datasheet, cable marking, photographs or dimensional information can help establish the correct kit.
New Installations, Repair and Extension
New Installation
- Select the splice kit at the cable design and procurement stage
- Compatible with primary cable and series circuit configuration
- Compatible with installation method and cable routing
- Suited to pit or duct arrangement and environmental conditions
- Meets maintenance requirements and project specifications
- Plan joint locations to minimise unnecessary joints and ease future inspection
Repair and Extension
- Damaged primary cable and cable replacement sections
- Extension of existing circuits
- Relocation of lighting equipment
- Modification of runway or taxiway infrastructure
- Replacement of deteriorated cable sections
- Isolate the circuit and establish cable condition first; the replacement section must suit the installation and the kit
Installation Considerations
Joints should be installed by suitably trained personnel following the manufacturer's instructions and project requirements.
Installation Environment and Joint Location
Environmental Factors
- Moisture and groundwater
- Soil conditions
- Temperature variation and humidity
- Dust
- Mechanical disturbance and cable movement
- Maintenance activities
- Installation inside or around cable pits
- In pits, avoid unnecessary mechanical stress and allow future inspection and maintenance
Joint Location and Routing
- Avoid unnecessary joints
- Provide adequate cable length for proper installation
- Avoid excessive bending near the finished joint
- Maintain suitable cable routing
- Prevent mechanical tension on the joint
- Protect the joint from foreseeable physical damage
- Maintain identification of the associated circuit
- Document the joint location for future maintenance
Inspection, Testing and Commissioning
After the joint is complete, inspect and test according to the applicable project and manufacturer requirements, using procedures appropriate to the installed circuit. Typical checks:
- Visual inspection of the completed joint
- Verification of correct component installation
- Conductor connection inspection
- Continuity testing
- Insulation resistance testing where specified
- Circuit resistance verification where applicable
- Verification of cable identification
- Inspection for visible sealing defects
- Verification that the cable was not mechanically damaged
Before returning the circuit to service:
- Confirm that the joint is fully assembled.
- Verify that all sealing and protection components are correctly installed.
- Confirm cable continuity.
- Perform the required insulation and electrical tests.
- Verify circuit identification.
- Confirm correct connection to the associated series circuit.
- Record test results.
- Restore the circuit according to the approved commissioning procedure.
The joint should not be energised until the required inspection and testing have been satisfactorily completed.
Maintenance and Troubleshooting
A correctly installed splice kit is intended to be durable with minimal routine maintenance. During scheduled AGL maintenance, inspect accessible joints for moisture ingress, physical damage, cable movement, deteriorated sealing components, overheating, corrosion or contamination, damage from excavation or other airport works, and changes to cable identification. A damaged or compromised joint should be evaluated and replaced or repaired using an approved jointing procedure.
Ordering Checklist
Before ordering, provide:
- Primary cable manufacturer and type
- Cable construction
- Conductor size and material
- Cable outside diameter
- Cable voltage classification
- Quantity required
- New installation or repair requirement
- Existing cable details for retrofit
- Installation environment
- Required jointing method
- Available installation space
- Project specification, where applicable
For existing installations, photographs of the cable marking and existing joint arrangement can also assist selection.
Electrical Safety — Isolation and Lock-Out
WARNING — never open a live series circuit. An open series circuit driven by a constant-current regulator can produce dangerously high voltage. Opening, cutting or disconnecting any part of an energised circuit can cause serious injury or death and damage equipment.
- De-energise the circuit at the regulator and apply the site lock-out / tag-out (LOTO) procedure before any work
- Where the circuit must be isolated or shorted, use the series circuit cut-out switch or approved isolation device — not an improvised bypass
- Verify the circuit is de-energised and the output is isolated before touching conductors, connectors, splices or transformers
- Work only under the airport's permit-to-work system, using qualified personnel and the manufacturer's instructions
- After any insulation-resistance or high-voltage test, discharge the cable and apply temporary earths before handling conductors
- Follow the applicable national electrical safety regulations and site procedures
Standards, Compliance and Documents
Standards and Compliance
- ICAO Annex 14 Vol. I and Doc 9157 Aerodrome Design Manual, Part 5 (Electrical Systems)
- FAA AC 150/5345-7F (L-824 underground electrical cable) and AC 150/5345-26E (L-823 connectors)
- FAA AC 150/5370-10, Item L-108 (installation of underground airport power cable, including splices)
- FAA AC 150/5340-26C (maintenance of airport visual aid facilities)
- Applicable electrical cable and jointing standards
- Airport authority specifications
- Project-specific technical specifications
- Manufacturer installation instructions
Documentation
- Product datasheet and technical specifications
- Installation instructions
- Kit component and compatibility information
- Product drawings and dimensional information
- Inspection and testing guidance
- Project documentation support
Confirm applicable standards and editions for the specific airport project and jurisdiction. Exact documentation depends on the selected kit configuration.
Selection Based on Your Actual Cable
Precision AGL Solutions selects components based on the actual AGL system configuration, to help ensure the jointing system is compatible with the installed cable and suitable for the airport environment.
AGL Joint / Splice Kit — Frequently Asked Questions
What is an AGL joint / splice kit?
An AGL joint / splice kit provides a protected and reliable field connection between sections of airfield lighting cable in a series-circuit installation. The completed joint restores electrical continuity and provides suitable insulation, protection against moisture and contamination, and mechanical protection.
Where are joint / splice kits used?
They are used for primary cable joints, repair and replacement of damaged cable sections, extension of existing cable runs, new airfield lighting installations, cable modifications during runway and taxiway works, rehabilitation and upgrading projects, and maintenance and corrective works on installed circuits.
How do I choose a kit that matches my cable?
Match the kit to the actual cable installed at site, not just the nominal cable name or circuit voltage. Selection may depend on cable construction, conductor size and material, insulation system, cable outside diameter, voltage class, screen or armour construction where applicable, existing cable condition, installation environment and the required jointing technique. FAA L-824 primary cable is 5 kV class.
Can I mix components from different jointing systems?
Avoid it. The jointing system must be selected and installed as a complete assembly, and components from incompatible cable or jointing systems should not be mixed unless compatibility has been technically established.
How should a joint be installed?
Joints should be installed by suitably trained personnel following the manufacturer instructions and project requirements: prepare the cable ends and conductors with the specified tools and dimensions, assemble the components in the specified order, install all sealing components correctly and protect the finished joint from bending, pulling, twisting and loading. Incorrect positioning or incomplete assembly can compromise insulation and sealing.
What testing is needed before the circuit is energised?
Typical checks are visual inspection of the completed joint, verification of component installation, conductor connection inspection, continuity testing, insulation resistance testing where specified, circuit resistance verification where applicable and verification of cable identification. The joint should not be energised until the required inspection and testing have been satisfactorily completed and the results recorded.
Where should joints be located?
Avoid unnecessary joints, provide adequate cable length for proper installation, avoid excessive bending near the finished joint, prevent mechanical tension, protect the joint from foreseeable physical damage, maintain identification of the associated circuit and document the joint location for future maintenance. In pits, allow for future inspection and avoid unnecessary mechanical stress.
What causes loss of continuity, low insulation resistance or repeated joint failure?
Loss of continuity can come from a poor conductor connection, damaged cable, incorrect assembly, mechanical damage or wrong component selection. Low insulation resistance can come from moisture ingress, damaged insulation, incorrect sealing, cable deterioration or contamination during installation. Repeated joint failure can come from wrong kit selection, cable incompatibility, incorrect procedure, mechanical stress, water ingress, poor joint location or damage from later civil works, so review the whole installation rather than only replacing the failed joint.
Which standards and documents are relevant?
References include ICAO Annex 14 Volume I and Doc 9157 Part 5, FAA AC 150/5345-7F (L-824 underground electrical cable), AC 150/5345-26E (L-823 connectors), AC 150/5370-10 Item L-108 (installation of underground airport power cable, including splices) and AC 150/5340-26C (maintenance of airport visual aid facilities), together with airport authority specifications and manufacturer instructions. Confirm the applicable editions for the project and jurisdiction.
Is it safe to work on a joint while the series circuit is energised?
No. An open series circuit driven by a constant-current regulator can produce dangerously high voltage. De-energise the circuit at the regulator, apply the site lock-out / tag-out procedure and work under the permit-to-work system. After any insulation-resistance or high-voltage test, discharge the cable and apply temporary earths before handling conductors. See the electrical safety warning on this page.
What should I send to get the correct splice kit?
Send the primary cable manufacturer and type, cable construction, conductor size and material, cable outside diameter, voltage classification, quantity, whether the job is a new installation or a repair, the installation environment, the required jointing method and the available installation space. For existing installations, photographs of the cable marking and the existing joint, or a cable sample, help establish the correct kit.
Procurement Information for Indian Projects
Indian public tenders commonly ask for the documents below. State which ones your tender requires when you send the enquiry, so they are covered in the quotation.
- Manufacturer / OEM authorisation
- Country of origin and local-content declaration (for Make in India purchase preference)
- Type-test and routine-test certificates, and the FAA / ICAO / IEC compliance documents named in the specification
- Datasheets, drawings and installation instructions
- Warranty, delivery period and spares support
- GeM catalogue or tender-portal requirements, where applicable
Send Cable Information for Splice-Kit Selection
Need a joint or splice kit for an existing or new AGL cable installation? Send the cable type, conductor size, cable diameter, voltage class, installation method and application details. For existing installations, photographs and cable markings help us identify the right configuration for new installations, repairs, extensions and rehabilitation projects.
Engineering Note
AGL cable joints are critical points within a series-circuit installation. A splice kit should never be selected solely on nominal voltage or cable size. Cable construction, conductor configuration, cable diameter, jointing method, environmental sealing and installation conditions should all be considered before procurement.
For replacement and rehabilitation works, verify the existing cable construction and joint arrangement before selecting a replacement kit.
Product Disclaimer
Product availability, configuration, dimensions, electrical characteristics, photometric performance, certifications and compliance status depend on the selected manufacturer and project specification. The technical values published on this page should not be treated as a substitute for the manufacturer's current approved Technical Data Sheet.
Final selection shall be based on the approved project specification, applicable aviation standards, authority requirements, manufacturer documentation and site conditions. Use of this page is also subject to the Legal Notice, Disclaimer & Terms of Use.
Standards and editions referenced on this site are listed on the Standards Reference page.