Ace Backstage 104BBX
Back Box, Double Wide Stage Pocket


The #025BBX, #102BBX, #103BBX and #104BBX Back Boxes are welded 14 gauge steel with a protective cover that is discarded when the pocket body is finally installed. The box and cover have a clear zinc corrosion resistant finish. A 1/2” mounting flange is predrilled to mate with the pocket body flange (#025BBX Back Box has a 7/16" mounting flange also predrilled to mate with Mini pocket body flange). The pocket body assembly is 4.5” deep and the back box is 6” deep providing a 1.5” work clearance in the bottom of the back box (ideal for feed thru or distribution junction). The Mini pocket body assembly is 2.25" deep and the Mini back box is 3.5" deep providing a 1.25" work clearance in the bottom of the back box.

The clearance volume (volume between bottom of pocket body and bottom of back box) is 260 cubic inches in the #104BBX, 144 cubic inches in the #102BBX, 92 cubic inches in the #103BBX, and 22 cubic inches in the #025BBX. ACE Back Boxes come with standard Electrical Conduit Combination 1/2”, 3/4”, 1”, and 1-1/4” Knock Outs, 2 places typical on opposing sides and Electrical Conduit Combination 1/2” and 3/4” Knock Outs, 1 place typical on opposing sides (see spec sheets). The #025BBX Back Boxes come with 1/2" and 3/4" Knock Outs, 2 places typical on opposing sides, 6 places typical on opposing sides, and 3 bottom Knock Outs.


  • Material: 14 Gauge Sheet Steel CRS (.071 Thick)
  • Finish: Clear Zinc, Mil Spec QQ-Z-325E Type 1, Class II
  • Fabrication: Precision Die Formed and Jig Welded

WARNING: Cancer and Reproductive Harm -

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