Type 4/3R Mild Steel Splitter Box CN4SB Series Hinge Door with Quarter Turn

Hammond Manufacturing SKU: CN4SB73


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  • The splitter boxes are designed for distribution of up to 600 A (max) service using either 3 or 4 wires.


  • CSA Type 3R, 12, 4
  • Complies with
    • IEC 60529, IP66


  • Formed 16 gauge steel (14 gauge on 30x24)
  • Factory installed splitter blocks.
  • Smooth, continuously welded seams ground smooth.
  • Door stiffeners are provided where required for increased strength and rigidity designed to also permit additional mounting options.
  • Formed lip on enclosure to exclude flowing liquids and contaminants.
  • Door latches feature the added safety of quarter turn slot requiring use of tool for opening.
  • Doors may be easily removed for modifications and are interchangeable.
  • Seamless poured-in place gasket.
  • Collar studs provided for mounting inner panel.
  • Includes hardware kit with panel mounting nuts and sealing washers for wall mounting holes.
  • Hinges are constructed from 304 stainless steel.
  • Hinge pins are stainless steel.
  • Inner panel is included.


  • Cover and enclosure are finished in recoatable smooth ANSI 61 gray powder coating.
  • Inner panel is finished in white powder coating.



3 Wire 4 Wire CU/AL Enclosure Optional Grounding
Part No. Part No. Amps H W D Kit
CN4SB73 CN4SB74 70/70 12.00 10.00 5.00 CGK125
CN4SB103 CN4SB104 125/120 15.00 10.00 5.00 CGK125
CN4SB203 CN4SB204 225/180 18.00 12.00 5.00 CGK225
CN4SB403 CN4SB404 400/340 24.00 17.00 6.00 CGK400
CN4SB603* CN4SB604* 600/574 30.00 24.00 7.00 CGK600