When testing voltage that supplies electronic equipment, the DMM test equipment should have a minimum CAT ___ rating.

In the context of testing voltage for electronic equipment, it's crucial to use a digital multimeter (DMM) with a minimum Category (CAT) rating that reflects the environment and application where you're working. The CAT rating indicates the level of transient overvoltage protection provided by the test equipment, which is essential for ensuring the safety and reliability of tests.

A minimum CAT I rating is appropriate for testing non-industrial equipment, like most electronic devices that are not directly connected to mains power. This equipment might include electronic circuits or devices that operate at lower voltage levels typically found in laboratory or office settings.

The appropriate use of a DMM with at least a CAT I rating helps ensure that the multimeter can handle low-voltage measurements safely without risking exposure to dangerous transients that could damage the equipment or pose a safety risk to the technician. For higher voltage environments or industrial applications, higher CAT ratings like II, III, or IV would be necessary, but these are not required for basic electronic testing. Using a minimum CAT I rating aligns with the safety standards for testing in these specific lower voltage applications.