FAA VS IEC
FAA standards are aviation-specific requirements for airport lighting equipment and systems, while IEC standards are international electrical/engineering standards covering the design, construction, testing and safety of electrical equipment. For AGL, they are complementary, not substitutes: FAA asks "is this equipment suitable for airport lighting application?" while IEC asks "is this electrical equipment designed and tested to the applicable international technical standard?"
At a Glance
| Feature | FAA Standards | IEC Standards |
|---|---|---|
| Organization | U.S. Federal Aviation Administration | International Electrotechnical Commission |
| Main scope | Airport / aeronautical lighting | Electrical, electronic and related technologies |
| Application | Primarily aviation/airport | International, across many industries |
| AGL-specific | Yes | Some standards are AGL-specific |
| Fixture photometry | Detailed aviation requirements | Depends on applicable IEC standard |
| CCR | FAA-specific equipment specification | General electrical requirements may apply |
| AGL transformer | FAA/project requirement | IEC 61823 specifically covers AGL series transformers |
| L-823 connector | FAA AC 150/5345-26 | May cover general connectors, not FAA L-823 requirements |
| Airport fixture | FAA AC 150/5345-46F | Can supplement electrical/environmental aspects |
| Cable | FAA L-824 specification | IEC cable standards can apply where specified |
| Certification | FAA/ALECP where applicable | IEC conformity/testing/certification schemes vary |
| Main objective | Aviation operational performance | Technical/electrical standardization |
FAA currently lists dedicated specifications for airport light fixtures, L-823 connectors, CCRs, cables, bases/transformer housings and other airport lighting equipment. IEC 61823, for example, specifically covers AGL series transformers for 6.6 A series circuits, up to 5 kV service voltage and CCR applications up to 30 kVA.
What Is FAA & IEC?
FAA
FAA has a dedicated airport-lighting document structure built around Advisory Circulars and equipment specifications. AC 150/5340 covers design and installation, AC 150/5345 covers equipment specifications, Engineering Briefs address specific technical topics, and AC 150/5345-53 covers equipment certification.
Main functions
- Airport / aeronautical application suitability
- Photometric performance requirements
- Equipment-specific specifications
- Certification via ALECP
IEC
IEC standards cover electrical equipment, transformers, cables, connectors, insulation, environmental testing, EMC, safety, protection, measurement, lighting and electronic equipment. The IEC system is much broader than aviation, though an important exception is that IEC does have standards written specifically for aerodrome lighting, such as IEC 61823 for AGL series transformers.
Main functions
- Electrical/technical design standardization
- Insulation, isolation and safety testing
- International conformity framework
- Component-level technical performance
Application vs Technology
The easiest way to remember the difference between FAA and IEC:
FAA
Application-specific — "Is this suitable for airport lighting?"
IEC
Technology/equipment-specific — "Does this electrical equipment meet the applicable technical requirements?"
Engineering point: Equipment flows into both an IEC technical standard and an FAA aviation application requirement, and both feed the final project compliance requirement.
Where IEC Standards Apply
IEC standards cover areas well beyond aviation, including:
- Electrical equipment
- Transformers
- Cables
- Connectors
- Insulation
- Environmental testing
- EMC
- Safety
- Protection
- Measurement
- Lighting
- Electronic equipment
An important exception within this broad scope is that IEC does have standards written specifically for aerodrome lighting, such as IEC 61823 for AGL series transformers.
Where FAA and IEC Work Together
IEC 61823 specifies characteristics of AGL series transformers used in 6.6 A series circuits. It addresses their use with CCR-fed AGL circuits and the isolation between primary and secondary circuits. FAA, on the other hand, may specify the transformer or associated airport-lighting equipment according to the applicable FAA/project requirements.
Layered requirement: IEC 61823 (transformer technical standard) + FAA requirement (airport application) + project specification (exact compliance requirement).
Where FAA Standards Are Primary
Runway light fixture
FAA has a specific equipment specification — AC 150/5345-46F, Specification for Runway, Taxiway, Heliport, and Vertiport Light Fixtures — establishing photometric, mechanical, electrical and environmental requirements. An IEC standard may address particular electrical, environmental, EMC or safety characteristics, but IEC compliance alone does not establish FAA airport-lighting compliance.
L-823 connector
FAA has a dedicated specification — AC 150/5345-26E — covering connectors used with underground airport-lighting power cables, isolation-transformer leads and fixture leads. A connector can satisfy a general IEC electrical connector standard and still not automatically qualify as an FAA L-823 connector.
CCR
FAA also has a dedicated specification — AC 150/5345-10H — for Constant Current Regulators and Regulator Monitors, covering output current, control, protection and monitoring. IEC standards may be used for individual electrical components, insulation, EMC and safety, but the AGL system requirements still need to be satisfied.
FAA Has the Advantage
For airport lighting, photometry is highly application-specific — candela, beam distribution, horizontal and vertical distribution, colour and required aviation performance. FAA specifications define the required photometric characteristics for particular airport fixtures.
For runway/taxiway light photometry, FAA requirements should be checked directly where FAA compliance is specified. A generic IEC lighting standard should not be assumed to replace the FAA photometric requirement.
IEC Has a Strong Role
IEC standards are particularly useful for detailed electrical engineering, including:
- Insulation
- Dielectric strength
- Temperature rise
- EMC
- Environmental testing
- Protection
- Component safety
Where the applicable IEC standard covers the equipment, it can provide a robust technical testing framework. But the final acceptance requirement should be based on the project's specified standard hierarchy.
FAA Certification vs IEC Test Reports
FAA has the Airport Lighting Equipment Certification Program (ALECP), which allows FAA-approved third-party certifiers to evaluate and certify airport-lighting equipment and license suppliers to mark products meeting FAA specifications.
IEC test certification and FAA equipment qualification are not the same thing. An IEC test report demonstrating IEC standard compliance does not automatically equal FAA qualification. If the project requires FAA-certified equipment, the appropriate FAA qualification/certification route must be followed.
FAA vs IEC for Common AGL Components
| AGL Component | FAA | IEC | Practical Priority |
|---|---|---|---|
| Runway light | Specific FAA fixture specification | Supporting standards | FAA + project |
| Taxiway light | Specific FAA requirements | Supporting standards | FAA + project |
| PAPI | Specific FAA specification | Supporting standards | FAA + project |
| CCR | Specific FAA specification | Supporting electrical standards | FAA + project |
| Isolation transformer | FAA/project requirement | IEC 61823 | Both where specified |
| L-823 connector | Specific FAA specification | General electrical standards may supplement | FAA |
| AGL cable | FAA L-824 | IEC cable standards may supplement | Applicable project requirement |
| Light base | FAA 150/5345-42K | Supporting material/mechanical standards | FAA + project |
| EMC | May be included in FAA requirements | Strong IEC framework | Both as specified |
| Electrical safety | FAA/project | Strong IEC framework | Both as specified |
Specifying a 6.6/6.6 A Transformer
Suppose you are specifying a 6.6/6.6 A isolation transformer. A strong technical specification could read:
AGL series isolation transformer shall comply with the applicable requirements of IEC 61823 and the project/FAA requirements applicable to the airport lighting system.
IEC 61823 specifically addresses AGL series transformers used in 6.6 A series circuits and their electrical isolation function. This is much stronger than simply stating "transformer shall be IEC compliant" because it identifies the specific AGL IEC standard.
LED Runway Light Compliance
An LED runway light's compliance rests on several layers working together:
- FAA fixture specification
- FAA photometry
- FAA installation requirements
- IEC electrical tests
- IEC EMC/environmental tests
- Project-specific requirements
FAA also maintains Engineering Brief 67 for light sources other than incandescent and xenon in airport and obstruction lighting fixtures. An LED fixture's compliance should be demonstrated against the actual applicable FAA specification/EB and project requirements, not merely by presenting an IEC LED test report.
Can FAA and IEC Both Be Used?
Yes — in fact, this is often the best approach. For an AGL transformer, IEC 61823 covers transformer technical performance, the FAA requirement covers airport application, and the project specification governs final acceptance.
Combined result: International technical standard + aviation-specific requirement + project requirement.
What You Should Not Do
IEC compliance addresses the technical/electrical standard; it does not by itself establish FAA airport-lighting application compliance.
FAA compliance addresses aviation application suitability; it does not by itself establish compliance with a specific IEC technical standard.
A credible submittal names the exact standard — e.g. "Complies with FAA AC 150/5345-46F and applicable IEC standards specified in the project requirements" — not just "FAA" or "IEC."
Technical Submittal Structure for AGL
| Equipment | FAA Requirement | IEC Requirement | Test Evidence |
|---|---|---|---|
| Runway light | AC 150/5345-46F | Applicable IEC | Photometry + type test |
| Taxiway light | AC 150/5345-46F | Applicable IEC | Photometry + type test |
| PAPI | AC 150/5345-28H | Applicable IEC | Photometry + functional test |
| CCR | AC 150/5345-10H | Applicable IEC | FAT + routine tests |
| Isolation transformer | Applicable FAA/project requirement | IEC 61823 | Type/routine test |
| L-823 connector | AC 150/5345-26E | Applicable IEC where specified | Inspection/test |
| Cable | AC 150/5345-7F | Applicable IEC where specified | IR + type/routine test |
| Light base | AC 150/5345-42K | Applicable IEC/material standard | Inspection/test |
| Control panel | AC 150/5345-3G | Applicable IEC | Functional test |
| Lighting control | Applicable FAA AC | Applicable IEC | FAT/SAT |
FAA's current listings identify AC 150/5345-28H for PAPI, 150/5345-10H for CCRs, 150/5345-7F for underground airport-lighting cable, 150/5345-26E for L-823 connectors, and 150/5345-42K for bases and transformer housings.
From Requirement to Commissioning
Project requirement → applicable FAA requirement + applicable IEC standard → manufacturer design → type test → routine test → FAT → SAT / field verification.
Easy Memory
Think: FAA
Airport lighting → aviation application → performance + installation
Think: IEC
Electrical/technical equipment → design + testing + safety
Which Standard Applies Where?
FAA compliance and IEC compliance should be treated as complementary requirements unless the project specification explicitly makes one standard sufficient. FAA tells you whether the equipment is suitable for the required airport-lighting application; IEC tells you whether the equipment meets the applicable international technical/electrical standard.
The most important point for technical documentation is to name the exact standard — not just "FAA" or "IEC."
Engineering & Expert Notes
Check Certification Scope
CertificationA certificate under one standard does not cover the other. Read what it actually covers.
Ask for Test Reports for the Specific Model
EvidenceGeneric claims are not enough. Request reports for the exact product.
Do Not Treat Them as Equivalent
PrincipleThey address different questions. Specify which is required and why.
Keep Certificates With the Submittal Record
RecordsStore certificates and reports in the project dossier.
Frequently Asked Questions
No. IEC compliance addresses the technical/electrical standard for the equipment; FAA compliance addresses whether the equipment is suitable for the specific airport-lighting application. IEC compliance alone does not establish FAA compliance.
Yes, and this is often the best approach — for example, an AGL transformer complying with IEC 61823 for its technical performance and with the applicable FAA/project requirements for its airport application.
Not automatically. IEC test certification and FAA equipment qualification are not the same thing. Where FAA-certified equipment is required, the appropriate FAA qualification/certification route (such as ALECP) must be followed.
Yes. IEC 61823 specifically covers AGL series transformers for 6.6 A series circuits, addressing electrical characteristics, insulation, isolation and performance/testing.
FAA specifications should be checked directly for photometric requirements where FAA compliance is specified. A generic IEC lighting standard should not be assumed to replace the FAA photometric requirement.
No. A credible technical submittal names the exact FAA document and the exact IEC standard rather than making a generic claim of certification.
Governing Documents
For an actual airport project, verify the current applicable editions of the relevant standards before using this comparison for project design.
FAA AC 150/5340 & AC 150/5345 Series
Airport-lighting design/installation and equipment specifications, including fixtures, CCRs, L-823 connectors, L-824 cable, bases and transformer housings.
IEC 61823 & Related IEC Standards
AGL series transformers for 6.6 A series circuits, plus general IEC standards for electrical components, insulation, EMC, safety and environmental testing.
FAA ALECP
The Airport Lighting Equipment Certification Program — FAA-approved third-party certification and product marking for airport lighting equipment.
Final Engineering Note
FAA and IEC compliance should be treated as complementary requirements unless the project specification explicitly makes one standard sufficient. Always name the exact standard rather than a generic claim.
FAA compliance and IEC compliance should be treated as complementary requirements — FAA governs aviation application suitability, IEC governs the underlying technical/electrical standard.
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