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347/600V, 3 Phase, Main Lugs or Main Breaker. Short Circuit Current Rating, or AIC, of the panelboard shall be possible up to 100,000 Amps in many configurations ... 480Y/277V feed, upstream 100A max Class J or Class T feeder fuse, no Z-MAX main breaker, 100k AIC. 480Y/277V feed, upstream 200A max Class J or Class T feeder fuse, no Z-MAX main ... ................
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