What are the L-823 connector types?
The FAA plug and receptacle connectors for airfield lighting cables, sorted by type and by class.
L-823 is the FAA specification for plug and receptacle cable connectors used in airfield lighting circuits, in FAA AC 150/5345-26. A connector is described by its type, which sets the conductors, current and voltage, and by its class, which sets how it is attached to the cable.
1The type sets the electrical rating
Type I has one conductor and is rated 25 A, 5000 V to ground. It is typically used on the series circuit cable. Type II has two conductors and is rated 20 A, 600 V between contacts (1500 V to ground). It is typically used on the secondary leads to the light. The circuit design decides which applies.
2The class sets how it is attached
Class A connectors are factory moulded to the cable. Class B connectors are field attached, fitted on site, so the quality of the workmanship decides how well the joint performs. Each type and class comes as a plug and a receptacle, and the specification also defines numbered styles for their shapes.
3Match the connector to the circuit
Type I and Type II are not interchangeable. Use the type, class and style that the circuit design and the manufacturer specify, never one rated below what the circuit needs, and confirm the requirements against the edition in force. A connector must also never be moulded to, or fitted on, a cable rated for a higher voltage than the connector itself. Never separate a primary connector on an energised series circuit: isolate at the CCR, lock out and prove the circuit dead first, because an open series circuit can reach a dangerous voltage.
| Designation | What it means | Typical use |
|---|---|---|
| Type I | 1 conductor, 25 A, 5000 V | Series circuit cable |
| Type II | 2 conductors, 20 A, 600 V | Secondary leads to the light |
| Class A | Factory moulded to the cable | Pre-moulded leads and assemblies |
| Class B | Field attached to the cable | Cable terminated on site |
Frequently Asked Questions
Q1What is an L-823 connector?
L-823 is the FAA specification for plug and receptacle cable connectors used in airfield lighting circuits, FAA Advisory Circular 150/5345-26. A connector is described by its type, which sets the number of conductors and the current and voltage rating, and by its class, which sets how it is attached to the cable.
Q2What are the two L-823 connector types?
Type I has one conductor and is rated 25 amperes and 5000 volts. Type II has two conductors and is rated 20 amperes and 600 volts. In practice Type I is typically used on the series circuit cable and Type II on the secondary leads to the light, but the circuit design decides.
Q3What is the difference between Class A and Class B?
Class A connectors are factory moulded to the cable. Class B connectors are field attached, meaning they are fitted to the cable on site, so the quality of that workmanship matters.
Q4Can Type I and Type II connectors be mixed?
No. They differ in conductors, current and voltage rating, and they are not interchangeable. Use the type the circuit design and the manufacturer specify, and never use a connector with a lower rating than the circuit needs.
Q5Where can I find the full specification?
In FAA AC 150/5345-26, which also defines numbered styles for the plug and receptacle shapes. The advisory circular has been revised several times, so confirm which edition applies to your project and your airport authority's requirements.
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