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101. Why is it necessary to perform periodic testing of correctly rated and properly installed circuit breakers?
Periodic testing of circuit breakers verifies they maintain their original protective function, ensuring continued protection against overloads and short circuits. Circuit breakers are designed to automatically interrupt circuits exceeding safe current levels, and while proper rating and installation are crucial, internal degradation can affect performance over time. Testing confirms breakers trip within specified characteristics, validating their ongoing effectiveness.
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