What is the expected voltage across contacts that are not energized within the operational range of the system?

The expected voltage across contacts that are not energized within the operational range of the system is 0 volts. This is because, in an electrical circuit, when contacts are open and not engaged, there is no current flowing through the circuit, leading to a voltage reading of zero across those contacts. This condition occurs when a switch is off, or a relay is not activated, ensuring that no potential difference exists between the contacts.

In contrast, the other voltage readings (24 volts, 120 volts, and 240 volts) typically represent energized states that may occur when the circuit is active or when particular components are powered. However, these values would not apply under circumstances where the contacts are not energized, establishing 0 volts as the accurate measurement for that condition.