The CSB403 is a 400 A, 3-wire Type 1 splitter box with factory-installed splitter blocks. Measuring 24 in x 17 in x 6 in (610 mm x 432 mm x 152 mm), it is built for electricians distributing a 3-wire feeder to several branch conductors in indoor electrical spaces.
The CSB Series ordering table rates this size at 400/400 A for copper and aluminum conductors, and names the CSBL400 as its splitter block reference. The series is designed for indoor distribution of up to 600 A (max) service at 600 V max using 3 or 4 wires, with 75 °C conductor ampacity permitted. The 4-wire version is the CSB404, and the empty box is the CSB400.
Construction is formed and spot-welded steel with the enclosure and cover finished in ANSI 61 gray powder coating. The hinged door closes with a screw and a padlocking hasp is provided. From the drawing: 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 on 14.00 in x 21.00 in centres. A series of knockouts on each side handles conductor entry.
The CSB403 is CSA Type 1 and complies with IEC 60529 IP20. It is REACH and RoHS compliant and ships in a box at 31 lbs (14.06 kg). UPC 623980263748.
| Series | CSB Series – Type 1 Mild Steel Splitter Box |
| Cover Style | Hinged door with screw |
| Description | Splitter Box, 400A - 24 x 17 x 6 - Steel/Gray |
| Part Number | CSB403 |
| Configuration | 3 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 |
| UPC | 623980263748 |
| UNSPSC | 39121324 |
| Related Part Numbers | CSB403 (3 wire), CSB404 (4 wire), CSB400 (less blocks) |
| Packaging Type | Box |
| Shipping Weight | 31 lbs (14.06 kg) |
| 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 |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The series ordering table lists 400/400 A, meaning 400 A for both copper and aluminum conductors.
Yes. The 4-wire version is the CSB404; the empty box without blocks is the CSB400.
The splitter block reference for this size is the CSBL400.
It is CSA Type 1 and complies with IEC 60529 IP20, for indoor use.
The shipping weight is 31 lbs (14.06 kg).
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