An afterset for a cellular raceway. The afterset includes an annular housing, an adjusting ring mounted in the housing, and a split cover for flush mounting removably secured to the adjusting ring. The housing has an internal bridge member which, in conjunction with the housing, forms a pair of power compartments open to the power cell of the cellular raceway and a pair of communication openings respectively open to the communication cells of the raceway, each power compartment has a duplex receptacle disposed below the cover and is accessible from the interior of the housing.
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