ABB - Installation Products 2-MBS - Two Gang Shallow Masonry Box, 33 Cubic Inches, 3-3/4 Inches Long x 3-3/4 Inches Wide x 2-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Concentric Knockouts, Galvanized Steel, Welded Construction, For use with Conduit
ABB - Installation Products

2-MBS

UPC: 781720005017


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Minimum Qty: 100

Multiplier: 100

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Overview

The ABB 2-MBS Two Gang Shallow Masonry Box is a precision-engineered electrical enclosure designed for professional masonry wall installations. Constructed from high-quality galvanized steel with welded seams, this box delivers superior corrosion resistance and structural integrity in demanding industrial and commercial environments. Measuring 3-3/4 inches long x 3-3/4 inches wide x 2-1/2 inches deep, the 2-MBS provides 33 cubic inches of internal space for wiring, devices, and conduit connections. The compact shallow profile minimizes wall penetration while maintaining ample capacity for standard electrical components. Key features include 1/2-inch and 3/4-inch concentric knockouts that allow flexible conduit entry from multiple angles without compromising box integrity. The concentric design simplifies installation by accommodating both trade sizes in the same knockout pattern, reducing the need for additional fittings. The welded construction ensures a seamless, leak-proof enclosure that meets rigorous electrical safety standards for masonry applications. This masonry box is specifically designed for mounting in concrete, brick, or block walls using standard masonry anchors. The galvanized steel finish provides long-term protection against moisture and corrosive elements common in industrial facilities, underground installations, and outdoor electrical rooms. With a UNSPSC code of 39121333, the 2-MBS is part of ABB's comprehensive line of installation products trusted by electrical contractors and facility managers worldwide. The shallow depth makes it particularly suitable for retrofit applications where wall thickness is a constraint, while the two-gang configuration provides space for duplex receptacles, switches, or multiple circuit terminations in a single enclosure.
  • 33 cubic inches internal volume for wiring and devices
  • 3-3/4" L x 3-3/4" W x 2-1/2" D shallow profile for minimal wall penetration
  • 1/2" and 3/4" concentric knockouts for flexible conduit entry
  • Galvanized steel construction with welded seams for corrosion resistance
  • Designed for concrete, brick, or block masonry wall installations

Specifications

Application
For use with conduit
Color
Silver
Connection Type
Conduit
Construction
Welded
Cubic Capacity
33 cu in
Knockouts
8
Material
Galvanized Steel
Material
Steel
Mounting Type
Masonry Wall
Number Of Outlet
2
Size
3-3/4 Inches Length x 3-3/4 Inches Width x 2-1/2 Inches Depth
Size
3-3/4 Inches Long x 3-3/4 Inches Wide x 2-1/2 Inches Deep, 33 Cubic Inches
Standard
UL E2969
Standard
UL E2969 / UL E2969
Type
Masonry Boxes
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
0.960 L
Package Weight (Metric)
0.436 kg
Single Gang Masonry Box, 22.0 Cubic Inches, 3-3/4 Inches Long x 1-7/8 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Concentric Knockouts, Galvanized Steel, Welded Construction, For use with Conduit

1-MB

Single Gang Masonry Box, 22.0 Cubic Inches, 3-3/4 Inches Long x 1-7/8 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Concentric Knockouts, Galvanized Steel, Welded Construction, For use with Conduit
Gangable Masonry Box, 79.0 Cubic Inches, 3-3/4 Inches Long x 9-3/16 Inches Wide x 2-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 525 G

Gangable Masonry Box, 79.0 Cubic Inches, 3-3/4 Inches Long x 9-3/16 Inches Wide x 2-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 94.8 Cubic Inches, 3-3/4 Inches Long x 11 Inches Wide x 2-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 625 G

Gangable Masonry Box, 94.8 Cubic Inches, 3-3/4 Inches Long x 11 Inches Wide x 2-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 134.0 Cubic Inches, 3-3/4 Inches Long x 11 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 635 G

Gangable Masonry Box, 134.0 Cubic Inches, 3-3/4 Inches Long x 11 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 93.5 Cubic Inches, 3-3/4 Inches Long x 7-3/8 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 435 G

Gangable Masonry Box, 93.5 Cubic Inches, 3-3/4 Inches Long x 7-3/8 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 111.7 Cubic Inches, 3-3/4 Inches Long x 9-3/16 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 535 G

Gangable Masonry Box, 111.7 Cubic Inches, 3-3/4 Inches Long x 9-3/16 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 22 Cubic Inches, 3-3/4 Inches Long x 3-3/4 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 235 G

Gangable Masonry Box, 22 Cubic Inches, 3-3/4 Inches Long x 3-3/4 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit
Gangable Masonry Box, 71.0 Cubic Inches, 3-3/4 Inches Long x 5-9/16 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

GW 335 G

Gangable Masonry Box, 71.0 Cubic Inches, 3-3/4 Inches Long x 5-9/16 Inches Wide x 3-1/2 Inches Deep, 1/2 Inch and 3/4 Inch Knockouts, Pre-Galvanized Steel, For use with Conduit

Frequently Asked Questions about ABB - Installation Products

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