The CSB404 is the 4-wire, 400 A version of the CSB Series Type 1 mild steel splitter box. It comes with factory-installed splitter blocks in a 24.00 in x 17.00 in x 6.00 in (610 mm x 432 mm x 152 mm) enclosure, for contractors distributing a 4-wire feed indoors.
The series ordering table lists this size at 400/400 A (copper/aluminum) with the CSBL400 as the splitter block reference. CSB Series boxes are designed for indoor distribution of up to 600 A (max) service at 600 V max using 3 or 4 wires, and 75 °C conductor ampacity is permitted. The 3-wire version is the CSB403 and the empty enclosure is the CSB400.
The box is formed and spot welded from steel, with enclosure and cover finished in ANSI 61 gray powder coating. It has a hinged door with screw closure, a padlocking hasp and a series of knockouts on each side. The drawing shows a 17.25 in x 24.25 in door, a 16.75 in x 23.89 in door opening and Ø0.25 in rear mounting holes spaced 14.00 in x 21.00 in.
Standards for the series are CSA Type 1 and compliance with IEC 60529, IP20.
| Series | CSB Series – Type 1 Mild Steel Splitter Box |
| Cover Style | Hinged door with screw |
| Part Number | CSB404 |
| Configuration | 4 wire – factory-installed splitter blocks |
| Enclosure Depth | 6.00 in (152 mm) |
| Enclosure Width | 17.00 in (432 mm) |
| Enclosure Height | 24.00 in (610 mm) |
| Size (H X W X D) | 24 in x 17 in x 6 in (610 mm x 432 mm x 152 mm) |
| Door Size (Drawing) | 17.25 in W x 24.25 in H |
| Door Opening (Drawing) | 16.75 in W x 23.89 in H |
| Conductor Temperature | 75 °C conductor ampacity permitted |
| Splitter Block Reference | CSBL400 |
| Series Application Rating | Indoor distribution of up to 600 A (max) service, 600 V max, 3 or 4 wires |
| Related Part Numbers | CSB403 (3 wire), CSB404 (4 wire), CSB400 (less blocks) |
| Colour | Gray |
| Finish | Enclosure and cover finished in ANSI 61 gray powder coating |
| Locking | Padlocking hasp |
| Material | Mild steel, formed and spot welded from 14 or 16 gauge steel (series) |
| Knockouts | Series of knockouts on each side |
| Enclosure Type | CSA Type 1 (indoor) |
| Ingress Protection | Complies with IEC 60529, IP20 |
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The ordering table lists 400/400 A (copper/aluminum) for this size, and the series is designed for up to 600 A (max) service at 600 V max.
Both are 24 x 17 x 6 in, 400/400 A boxes with factory-installed blocks; the CSB404 is 4 wire and the CSB403 is 3 wire.
CSBL400.
Yes, the box has a padlocking hasp on its hinged screw-closure door.
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