What is Airport Lighting Cable?

The Essential Runway Feeder

Airport infrastructure demands absolute reliability and compliance. The cable that powers runway and taxiway lights operates under constant electrical stress and environmental exposure. It is highly specialized and governed by strict Federal Aviation Administration (FAA) standards.

The mandatory choice for series circuit airport lighting systems is Airport Lighting Cable FAA-L-824 Type C 5KV.

This cable is engineered specifically for use with Constant Current Regulators (CCRs) up to 5,000 Volts, ensuring maximum safety, system integrity, and longevity beneath active airfield surfaces. Here is everything engineers, electrical contractors, and government purchasers need to know about this critical component.

1. The Compliance Standard: Why Airport Lighting Cable is Mandatory

This cable is required because it meets the unique, demanding criteria of airport lighting circuits, which operate differently from standard utility power.

• Series Circuit Power: Airport lighting uses series circuits powered by CCRs that maintain a constant current (e.g., 6.6 Amperes) while the voltage fluctuates up to 5,000 Volts. The cable must handle these high, fluctuating voltages without insulation breakdown.

• FAA Specification: The cable must be compliant with the FAA Specification L-824, which outlines the specific materials and construction required for maximum reliability in airfield applications. Type C is the standard for direct burial medium-voltage lighting cable.

• Insulation Integrity: The required insulation is high-grade XLPE (Cross-Linked Polyethylene). This material offers superior dielectric strength and thermal stability compared to standard cables, resisting the voltage stresses generated by the CCR.

2. Construction & Durability: Built for Direct Burial

Airport lighting cable is almost entirely buried, making its jacket and insulation critical to its decades-long lifespan.

• Conductor Material and Stranding: The cable uses highly conductive Copper conductors (typically Class B or C stranding). Copper is chosen for its superior conductivity and reliability over long circuits.

• Jacket Protection: The outer jacket is heavy-duty, usually Chlorinated Polyethylene (CPE) or a comparable compound, which provides unmatched resistance against:

  • Direct Burial Conditions: Resists moisture, soil chemicals, and abrasion from rocks and backfill.

  • Fuel and Oil: Critical for areas near taxiways and fueling zones.

  • Ozone and Sunlight (UV) Exposure: Essential for the small sections of cable that emerge from the ground for transformer connections.

• Single Conductor: FAA-L-824 Type C cable is a single-conductor cable, typically run as a pair (one feeder, one return) for the series circuit.

3. Sizing and Selection Notes

Cable sizing for FAA circuits is based on current, not load, and must minimize impedance to maintain light brightness.

• Standard Gauge: The most common gauge sizes are 8 AWG and 6 AWG. The 8 AWG is generally the minimum required for 6.6 Ampere circuits.

• Impedance and Voltage Drop: While the CCR system adjusts voltage to compensate for cable resistance, minimizing impedance is vital. Excessive impedance can limit the maximum possible voltage, potentially preventing the CCR from powering a fully loaded circuit. Engineers often oversize the cable (e.g., using 6 AWG instead of 8 AWG) to reduce impedance on long runs.

• Installation Note: All cable must be installed according to FAA advisory circulars (ACs), including required burial depths and clearances from other utilities. Proper splice kits and connectors are essential to maintain the 5kV rating and moisture seal.

4. Key Applications for Airport Lighting Cable

This cable is the mandate for all series circuit runway and taxiway systems:

• Runway Lighting: Edge lights, center line lights, and touchdown zone lights.

• Taxiway Lighting: Edge lights, center line lights, and guidance signs.

• Heliports: Perimeter and approach lighting.

• Constant Current Regulator (CCR) Feeders: Connecting the regulator vault to the start of the airfield circuit.

5. Why Buy Airport Lighting Cable

FAA-L-824 Type C 5kV Cable is the high-voltage backbone of airfield safety. Its XLPE Insulation and heavy-duty jacket are specifically engineered to endure the unique electrical stress of CCR circuits and the harsh conditions of direct burial, ensuring reliable, long-term operation.

Wire America is proud to offer this product by the foot or by the spool with fast shipping to your location.

Click Here to Shop Our Airport Lighting Cable Selection

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⚠️ Important Disclaimer: Safety and Compliance

Wire America provides this information as a guide only. Electrical installations must strictly adhere to the National Electrical Code (NEC) and all state, local, and jurisdictional requirements, which vary widely. Always consult a licensed electrician, electrical engineer, or the local inspecting authority before purchasing material or starting any electrical project. Wire America assumes no liability for the installation, use, or interpretation of these guides.