Besides the meter, what else must have the same CAT rating?

The correct answer is that the meter leads must have the same CAT rating as the meter itself. This is essential for ensuring safety and effectiveness when troubleshooting or working on electrical circuits. The CAT (Category) rating of electrical equipment indicates the level of transient voltage the equipment can withstand and is crucial for determining how and where the device can be safely used.

When the meter leads have the same CAT rating as the meter, it ensures that both components are capable of handling the same maximum voltage level, thus providing protection against spikes that might occur during measurement. If the leads were rated lower than the meter, there would be a potential risk of failure in the leads during high-voltage situations, which could lead to hazards such as electrical shock or equipment damage.

In contrast, while insulated tools, protective gloves, and circuit breakers are important for safety and functionality in electrical work, their ratings do not have to match the CAT rating of the meter in the same direct way. Insulated tools and protective gloves provide protection from electrical hazards, but their ratings refer to their insulation quality, not transient voltage categories. Circuit breakers serve to protect circuits from overloads and faults but are not directly involved in the measurement process associated with the meter and leads. Therefore, it's the meter leads that