Junction Pit
Provides an underground or accessible field infrastructure point for cable connection and maintenance.
View Details Field Electrical Infrastructure
AGL Junction Box for Airfield Cable Connections
Protected access point for field cable connection and distribution
Junction boxes for protected airfield lighting cable connections, maintenance access and field electrical infrastructure.
Supplied by Precision AGL Solutions
Product Overview
AGL Junction Box
What It Is
Junction boxes provide protected access points for field cable connection and distribution within an Airfield Ground Lighting (AGL) installation.
They provide a controlled enclosure for cable terminations, connections and equipment interfaces while helping protect electrical components from environmental and mechanical conditions.
What We Supply
Precision AGL Solutions supplies junction-box configurations selected according to cable type, connection requirements, enclosure conditions, mounting arrangement and project-specific installation requirements.
Applications
Where AGL Junction Boxes Are Used
Primary field cable connectionsPrimary circuit connection points.
Secondary cable connectionsSecondary circuit connection points.
Field cable distributionDistribution within the AGL installation.
Equipment interfacesInterfaces to field equipment.
Lighting-system connection pointsConnection points within lighting systems.
Maintenance & inspectionMaintenance and inspection installations.
Cable transition pointsTransitions between cable arrangements.
New AGL infrastructureNew-build installations.
Rehabilitation projectsAirfield lighting rehabilitation.
Select the appropriate junction-box configuration according to the electrical circuit and installation environment.
Key Features
What the Junction Box Provides
Features
- Protected enclosure for field cable connections
- Configurable cable-entry arrangement
- Suitable for primary or secondary applications as applicable
- Terminal and connection arrangement based on project requirements
- Sealing and ingress protection appropriate to the installation
- Accessible design for inspection and maintenance
- Multiple mounting options depending on configuration
- Suitable for new-build and retrofit installations
Technical Data
AGL Junction Box Specification
| Parameter | Specification |
|---|---|
| Product Type | AGL junction box |
| Application | Field cable connection and distribution |
| Enclosure Material | Configuration dependent |
| Dimensions | Project/configuration dependent |
| Cable Entries | Number and size as specified |
| Terminal Arrangement | Project/circuit dependent |
| Sealing | Configuration dependent |
| Ingress Protection | As specified for installation |
| Mounting | Surface, structure or other approved arrangement |
| Cable Compatibility | Primary/secondary cable as applicable |
| Operating Environment | Airfield and outdoor installation conditions |
Exact enclosure dimensions, cable-entry sizes, terminal configuration and ingress-protection rating should be confirmed for the selected model and project application.
Enclosure Construction
Physical Protection for Internal Connections
Selection May Consider
- Enclosure material
- Mechanical strength
- Corrosion resistance
- Environmental exposure
- Internal component arrangement
- Access requirements
- Cable-entry configuration
- Required sealing performance
The enclosure construction should be appropriate for its intended location and exposure conditions.
Cable Entry
Coordinate Entries With Cables and Connectors
Typical Considerations
- Cable diameter
- Number of incoming and outgoing cables
- Primary or secondary circuit configuration
- Glands or other entry arrangements
- Connector dimensions
- Bend radius
- Cable-support requirements
- Sealing around cable entries
Cable-entry positions should provide sufficient clearance for installation, termination and future maintenance.
Terminals & Connections
Terminal and Connection Arrangement
Depending on the Application, the Box May Accommodate
- Cable terminals
- Earthing and bonding of metallic enclosures, per the approved design
- Connection points
- Distribution terminals
- Equipment interfaces
- Protective components where specified
- Identification and circuit labelling
Configure the internal terminal arrangement according to the intended electrical function, and clearly identify it in coordination with the approved electrical drawings.
Circuit Applications
Primary and Secondary Cable Applications
Primary Cable Applications
Where used within an AGL primary circuit, select the junction box for compatibility with the circuit arrangement and cable system. Considerations:
- Series-circuit configuration
- Cable construction
- Operating circuit current
- Connector system
- Insulation requirements
- Environmental exposure
- Required clearances and terminations
For high-voltage AGL primary circuits, review the complete connection arrangement as a system rather than selecting the enclosure independently. Primary series-circuit connections are normally made with approved splice or L-823 connector assemblies rather than general-purpose terminal blocks, and the enclosure must never be opened while the series circuit is energised.
Secondary Cable Applications
Junction boxes may also be used for selected secondary cable and equipment-interface applications. Selection should consider:
- Fixture or equipment connection
- Secondary cable type
- Connector arrangement
- Cable-entry requirements
- Environmental exposure
- Maintenance access
The arrangement should be compatible with the associated isolating transformer, fixture lead or field equipment.
Sealing & Ingress Protection
Protection in Outdoor Airfield Environments
Enclosure and Cable Entries Should Protect Against
- Rain and water ingress
- Dust and contaminants
- Moisture and condensation
- Corrosive environmental conditions
- Temperature variation
- Mechanical exposure
Determine the required ingress-protection level from the installation location and project specification.
Mounting Arrangements
Mounting Options
Depending on the Application
- Surface mounting
- Equipment mounting structures
- Service-area mounting
- Junction-pit interfaces
- Other approved field mounting arrangements
The mounting method should provide adequate mechanical support while maintaining access for cable installation and maintenance. Within the movement area or runway strip, boxes must not become an obstacle: use below-grade installation (for example in a pit) or a frangible arrangement, as the aerodrome design requires.
Maintenance Access
A Controlled Access Point for Field Connections
Maintenance Provisions Should Allow Technicians To
- Inspect cable entries
- Check terminal connections
- Identify circuits
- Inspect sealing
- Check for moisture or contamination
- Verify cable condition
- Perform approved electrical tests
Consider access during the initial installation rather than after the box has been permanently positioned.
Installation
Before Installation, Verify
Verify
- Junction-box dimensions
- Cable types and quantities
- Cable-entry positions
- Terminal arrangement
- Enclosure material
- Ingress-protection requirements
- Mounting method
- Accessibility
- Environmental conditions
- Connection and identification requirements
The installation should follow the approved electrical drawings and project installation procedures.
Commissioning
Inspect the Junction Box and Associated Cables
Inspect For
- Correct cable routing
- Secure terminations
- Correct circuit identification
- Proper cable-entry sealing
- Enclosure integrity
- Appropriate mounting
- Absence of visible damage
- Correct electrical continuity where applicable
Carry out any electrical testing using the applicable project commissioning and safety procedures.
Replacement & Retrofit
Upgrading or Modifying Existing AGL Field Infrastructure
For Replacement or Retrofit Selection, Provide
- Existing junction-box dimensions
- Cable types and sizes
- Number of cable entries
- Existing terminal arrangement
- Mounting arrangement
- Environmental conditions
- Available installation space
- Existing photographs or drawings
This helps determine whether the replacement can use the existing installation arrangement or requires modification.
Safety
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
- Follow the applicable national electrical safety regulations and site procedures
Standards & References
Applicable Requirements
Principal References
- FAA AC 150/5345-42K (airport light bases, transformer housings, junction boxes and accessories)
- FAA AC 150/5340-30J (design and installation details for airport visual aids)
- ICAO Doc 9157 Aerodrome Design Manual, Part 5 (Electrical Systems)
- IEC 60529 (ingress-protection ratings)
- DGCA India CAR Section 4 and airport authority specifications
Use the edition current at the time of your project.
Coordinate Selection With
Applicable requirements depend on the electrical circuit, enclosure location, cable system and project specification. Coordinate junction-box selection with the applicable AGL electrical requirements, cable and connector specifications, enclosure requirements and approved project documentation.
FAQ
AGL Junction Box — Frequently Asked Questions
What is an AGL junction box?
An AGL junction box is a protected enclosure that gives an access point for field cable connection and distribution within an Airfield Ground Lighting installation. It provides a controlled enclosure for cable terminations, connections and equipment interfaces while protecting electrical components from environmental and mechanical conditions.
Where are junction boxes used?
They are used for primary and secondary field cable connections, field cable distribution, equipment interfaces, connection points within lighting systems, cable transition points, maintenance and inspection installations, new AGL infrastructure and rehabilitation projects.
How does a junction box differ from a junction pit?
A junction box provides protected above-ground or equipment-level field cable connections, whereas a junction pit provides underground access to cable joints, connectors and field electrical equipment. See the AGL junction pit page for the underground option.
Can a junction box be used on a primary series circuit?
Where used within a primary circuit, select it for compatibility with the series-circuit arrangement, cable construction, operating current, connector system and insulation requirements, and review the complete connection arrangement as a system. Primary series-circuit connections are normally made with approved splice or L-823 connector assemblies rather than general-purpose terminal blocks, and the enclosure must never be opened while the series circuit is energised.
What should be coordinated for cable entries and terminals?
Coordinate the cable diameter, the number of incoming and outgoing cables, glands or other entry arrangements, connector dimensions, bend radius, cable support and sealing around the entries. Entry positions should leave clearance for installation, termination and future maintenance. The internal terminal arrangement should match the electrical function, with earthing and bonding of metallic enclosures per the approved design, and be identified in coordination with the approved electrical drawings.
What ingress protection does a junction box need?
The enclosure and cable entries should protect against rain and water ingress, dust and contaminants, moisture and condensation, corrosive conditions, temperature variation and mechanical exposure. Determine the required ingress-protection level from the installation location and project specification, with IEC 60529 as the reference for IP ratings.
How can a junction box be mounted?
Options include surface mounting, equipment mounting structures, service-area mounting, junction-pit interfaces and other approved field mounting arrangements. The method should give adequate mechanical support while keeping access for cable installation and maintenance. Within the movement area or runway strip, boxes must not become an obstacle: use below-grade installation, for example in a pit, or a frangible arrangement, as the aerodrome design requires.
What maintenance access should be provided?
The box should let technicians inspect cable entries, check terminal connections, identify circuits, inspect sealing, check for moisture or contamination, verify cable condition and perform approved electrical tests. Consider access during the initial installation rather than after the box has been permanently positioned.
What is checked at installation and commissioning?
Before installation, verify the dimensions, cable types and quantities, cable-entry positions, terminal arrangement, enclosure material, ingress-protection requirement, mounting method, accessibility and identification requirements. At commissioning, inspect cable routing, terminations, circuit identification, cable-entry sealing, enclosure integrity, mounting, visible damage and electrical continuity where applicable.
Which standards apply to junction boxes?
Principal references are FAA AC 150/5345-42K (airport light bases, transformer housings, junction boxes and accessories), AC 150/5340-30J, ICAO Doc 9157 Part 5, IEC 60529, and DGCA India CAR Section 4 together with airport authority specifications. Use the edition current at the time of your project.
Is it safe to open a junction box on a live series circuit?
No. An open series circuit driven by a constant-current regulator can produce dangerously high voltage, and opening, cutting or disconnecting any part of an energised circuit can cause serious injury or death. De-energise the circuit at the regulator, apply the site lock-out / tag-out procedure, verify the circuit is de-energised and work under the permit-to-work system. See the electrical safety warning on this page.
What information is needed to select a replacement junction box?
Provide the existing junction-box dimensions, cable types and sizes, number of cable entries, existing terminal arrangement, mounting arrangement, environmental conditions, available installation space and photographs or drawings. This helps determine whether the replacement can use the existing installation arrangement or needs modification.
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
Request Junction-Box Selection
For junction-box selection, provide the application, cable type, cable quantity, cable dimensions, connection arrangement, installation location and required mounting configuration. Precision AGL Solutions can review the field connection requirements and help identify a suitable AGL junction box and associated cable-entry and termination arrangement.
- Emailprecisionaglsolutions@gmail.com
- Websiterahulsharmaagl.in
- LinkedInPrecision AGL Solutions
- Phone+91 98214 96412
Engineering Note
Exact enclosure dimensions, cable-entry sizes, terminal configuration and ingress-protection rating should be confirmed for the selected model and project application. Coordinate junction-box selection with the applicable AGL electrical requirements, cable and connector specifications, enclosure requirements and approved project documentation.
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.