What are the two parts of the six-conductor aircraft service cable?

What are the two parts of the six-conductor aircraft service cable?

• A. Two for power, four for interlock pins E and F
• B. Three for power, three for interlock
• C. Six for power
• D. Four for power, two for interlock circuit pins E and F

Answer: (D)

The main idea is that this six-conductor service cable is split into a power path and an interlock path. Four conductors carry the actual service power, providing the necessary hot and return connections for the load. The remaining two conductors form the interlock circuit (pins E and F), which handles safety signaling to verify the connector is properly mated and safe before power can be applied. This separation keeps the power and interlock functions distinct, ensuring you can’t energize the system unless the interlock condition is satisfied.

The main idea is that this six-conductor service cable is split into a power path and an interlock path. Four conductors carry the actual service power, providing the necessary hot and return connections for the load. The remaining two conductors form the interlock circuit (pins E and F), which handles safety signaling to verify the connector is properly mated and safe before power can be applied. This separation keeps the power and interlock functions distinct, ensuring you can’t energize the system unless the interlock condition is satisfied.