Journeyman practice test
Journeyman · Question 1 of 2530:00
Overcurrent Protection
The available fault current at a panelboard's line terminals is 22,000 A. No series-rated combination is used, and its breakers come in interrupting ratings of 10,000, 14,000, 22,000 and 25,000 A. What is the lowest interrupting rating its breakers may have?
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