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What hub style does the rainproof QO-RB, load centers accept?

Rainproof QO-RB load centers use suffix RB in their catalog number. The R designates a Rainproof enclosure and the B designates that the device accepts bolt-on B-Hubs, 3/4`` - 2 1/2`` (B075 - B250). A closing cap (BCAP) is provided on all RB suffix devices.

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