Airport Lighting Cables are part of a Series Lighting circuitry used for airport applications that are technically sound, flexible, reliable and cost effective in design. The three major components of this cirucit are the constant current regulator, isolation transformer and the series circuit wiring.
The airport lighting cable is the single wire loop from the constant current regulator to each load (one after the other) and then returned to the source. Normally 8 awg cables work well as the current ratings are 6.6 to 20 Amps. Standard voltage ratings on these cables are 5KV. These cables are either direct buried or placed in underground raceways.
The single loop design allows for things like the control of Lamp Illumination Levels as each load receives power equally through the loop thus operating the lamps at the same brightness. To lower the brightness simply lower the current. This then allows for good and poor weather conditions and also allows the lamps to be lowered as the plane gets closer to alleviate stress on the pilots eyes. Reliability as the loop design operates even with burnt out bulbs, shorts and grounds ensuring safe landings until maintenance can resolve the issues. Flexibility in the loop design allows installers to add or remove loads and the only thing that may have to change is the isolation transformer if the amperage gets too large.
The product is CSA ASLC C22.2 #179, FAA L-824 & ICEA S-66-524 and -40C cold impact and -35C cold flexibility.