High current conductors for the propulsion system must not be contained with what other type of circuits?

High current conductors for the propulsion system must not be contained with AC or DC circuits due to safety and reliability concerns. High current conductors typically handle significant power loads and can generate heat, which poses a risk when placed alongside other circuits that may be more sensitive or have lower current ratings.

The interference caused by fluctuations in high current can lead to voltage drops, noise, or even disruptions in the proper functioning of AC or DC circuits, which are often used for critical systems such as navigation or electronic control systems. By keeping high current conductors separate, it minimizes the risk of complications, such as potential overloads or short circuits, which could impact the operation of vital electrical systems on the vessel.

When considering the other types of circuits—such as fuel systems, lighting circuits, or instrumentation circuits—they typically have specific standards and installation requirements that do not focus on managing high current. Therefore, it is crucial to maintain separation for the safe operation and reliability of all systems aboard.