

Case 10
400 Hz Ground Power Cable for an Airport Pit System
This project record covers 450 m of 400 Hz ground power cable, four separately sheathed 1×70+4×1 cores twisted together, made for a Russian buyer’s pit system that connects parked aircraft at a civil airport.
- Application
- Pit system on a civil-airport apron, from the pit equipment to the aircraft’s 400 Hz receptacle
- Construction
- 4×(1×70+4×1): tinned copper conductors, black EPR, sixteen 1 mm² FEP control cores, yellow PUR sheath on each core
- Assemblies
- 15 m and 28 m lengths, made up by the buyer with 400 Hz aircraft connectors ordered with the cable
The record explains the 4×(1×70+4×1) designation, why cut length matters at 400 Hz, what the control cores carry, the buyer’s question on PUR at −40 °C, and how the cable was made and packed.



















