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What safety rating category should a multimeter possess for testing residential service panels and 240V circuits?

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 Correct IncorrectCAT III 600V or CAT IV rating. CAT-rated meters are engineered with appropriate fusing, clearances, and transient protection to reduce the risk of dangerous failure during high-energy surges.

What safety rating category should a multimeter possess for testing residential service panels and 240V circuits?

• Any cheap non-rated multimeter
• CAT III 600V or CAT IV (distribution and building installation rated)
• CAT I (electronic bench only)
• CAT 0 appliance grade