What is the maximum current rating of the amp clamp?

• A. 300 Amps
• B. 1000 Amps
• C. 200 Amps
• D. 600 Amps

Answer: (D)

Understanding this starts with how an amp clamp works. The clamp uses a magnetic core and current-transformer principle to sense the current flowing through a conductor without making contact. That sensing capability has a limit, set by the design—specifically the core saturation point and the insulation/thermal limits. When the current stays within that limit, readings are accurate and the tool stays safe.

For this clamp, the specified maximum current rating is 600 Amps. That means you can rely on accurate measurements up to 600 A. If you push beyond that, the core can saturate, the reading loses linearity, and the device can overheat, leading to unreliable results or potential damage. The other options are either too low to reflect the device’s true capability or exceed what it’s built to handle safely, so they aren’t appropriate for this tool’s rating.