In a 28-volt system, what is the maximum allowable voltage drop for a specific installation?

In a 28-volt electrical system, the maximum allowable voltage drop is generally considered to be around 1 volt. This standard is established to ensure that the voltage delivered to components or systems remains within acceptable limits for optimal performance and reliability. A voltage drop exceeding this level can lead to inadequate voltage supply to systems, which may result in poor performance, malfunction, or premature failure of electrical components.

The 1-volt limit is particularly important in aviation applications, where stable and reliable electrical performance is critical for safety and functionality. As a best practice, maintaining a lower voltage drop not only enhances system efficiency but also helps ensure that all components receive the necessary voltage to operate effectively under various load conditions. Therefore, the choice of 1 volt aligns well with industry standards for voltage drop in a 28-volt installation.