In the context of electrical testing, what does 'load testing' evaluate?

Load testing evaluates the performance of electrical equipment or systems under specific load conditions. This type of testing typically involves applying a known load to the equipment and measuring its response to that load in terms of voltage, current, and other performance metrics. By simulating actual operating conditions, load testing helps determine whether the equipment can handle its intended operational demands without failure or degradation of performance.

The purpose of load testing is to ensure that an electrical system can operate reliably when subjected to the physical and electrical stresses that occur during normal use. It can reveal issues such as overheating, voltage drops, or other operational inefficiencies that may not be apparent during no-load tests. This is crucial for maintaining system longevity and ensuring safety in electrical installations.

The other options pertain to different aspects of electrical testing. Measuring resistance is essential for assessing wiring integrity, checking voltage levels is vital for understanding the operation of the electrical system, and monitoring temperature is important for preventing overheating and potential failures. However, none of these directly focus on how equipment performs under actual load, which is the key aspect addressed by load testing.