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by Raco 

Catalog ID: 189M

4 in. Square Box, Welded, 1-1/2 in. Deep with Six 1/2 in. KO's & Four TKO's, Raised Ground, 8 in. #12 Solid Copper Pigtail, UBS, HM Bracket

Designed to enclose electrical wiring, switches, receptacles or lighting fixtures. Constructed from 1/16 in. pre-galvanized steel. 8-32 cover mounting screws assembled. Suitable for use without a bonding jumper in circuits up to 600V.

  • TKO knockout design provides installation flexibilty
  • UBS integrated support provides the bracing on back of box for wall cavities between 2-1/2 in - 6 in. thickness, H/M
  • Welded construction
  • Six 1/2 in. knockouts and four TKO knockouts
  • UL Listed
  • 21.0 cu. in. capacity
  • Raised ground, 8 in. #12 Solid Copper pigtail
  • Acceptable in 2-hour fire rated walls

Product Details


Bracket Setback 0.375
Bracket Type M, for Metal or Wood Studs
Drawn or Welded Welded
Fire Resistance Yes
Knockouts 1/2 in;1/2 - 3/4 in Combination (TKO)
Material Steel
Type Box
UPC 050169500019
Wiring System Conduit


Actual Depth 2.063 in
Cubic Capacity 21.0 cu.in
Depth 1.5 in
Height 4 in
Raised Ground Yes
Weight 0.87 lb
Width 5.86 in

Certifications and Compliance

Certified Listed UL Listed


Carton Quantity 20
Packaging Type No Packaging
Pallet Quantity 1600



Sell Sheets


RACO: H&M Series Installation

Sales Drawings

Terms and Conditions