Engine : Electricity - 1282/1386
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| Why is it necessary to perform periodic testing of correctly rated and properly installed circuit breakers? |
| A) to insure they will be able to withstand at least 125% of applied voltage |
| B) to insure they can trip faster as they increases in age |
| C) to insure they will continue to provide the original degree of protection |
| D) to insure they do not exceed their interrupting capacity |
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