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What is the maximum available circuits, for a NQ panel rated120/240V 3 phase 4 wire Delta high leg voltage system?

How many circuits can be added in one NQ panel rated for a delta high leg system?

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NQ panels

NQ panels rated for a 240V delta high leg system, are restricted to 72 circuits max. That is as long as there are no more than 5 - 70A and above breakers. 
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