CST4403 packs a 400 A (CU/AL) 3-wire splitter block into a 48 x 10 x 6 in Type 1 steel trough with a hinged, screw-secured door. It is intended for electricians, electrical contractors and facilities teams distributing a service to multiple loads in indoor locations.
The splitter block is factory installed and carries a 400 A copper / 400 A aluminum rating (CU/AL) per the ordering table, with block reference CSBL400. The series is designed for 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 of this size is CST4404, and an empty version is CST4400.
The trough is formed and spot welded from 14 gauge mild steel and measures 48 in high, 10 in wide and 6 in deep (1,219 mm x 254 mm x 152 mm). The drawing shows a front opening of 46.75 x 9.61 in. A series of knockouts is provided on each side, with 0.88, 1.13 and 1.38 in diameters shown on the part drawing, and the hinged door is secured with a screw and fitted with a padlocking hasp. Cover and enclosure are finished in recoatable smooth ANSI 61 gray powder coating.
The CST Series is CSA Certified and complies with IEC 60529, IP20 for Type 1 indoor use. CST4403 ships boxed at 38 lbs (17.24 kg), and the part is listed as RoHS and REACH compliant.
| Series | CST Series Type 1 Mild Steel Splitter Trough |
| Cover Style | Hinged door with screw |
| Product Type | Splitter trough with 3-wire splitter blocks |
| Long Description | Splitter Trough, 400A - 48 x 10 x 6 - Steel/Gray |
| Short Description | SPLITTER TROUGH 48X10X6, 400A |
| Wiring Configuration | 3 wire |
| Depth | 6.00 in (152 mm) |
| Width | 10.00 in (254 mm) |
| Height | 48.00 in (1219 mm) |
| Size (H X W X D) | 48 in x 10 in x 6 in (1,219 mm x 254 mm x 152 mm) |
| Front Opening Width (Per Drawing) | 9.61 in |
| Front Opening Height (Per Drawing) | 46.75 in |
| Splitter Blocks | Factory installed |
| Conductor Ampacity | 75 °C conductor ampacity permitted |
| Splitter Block Reference | CSBL400 |
| Series Application Rating | Distribution of up to 600 A (max) service, 600 V max, using 3 or 4 wires |
| Ordering Table Rating (CU/AL) | 400/400 A |
| UPC | 623980263458 |
| UNSPSC | 39121324 |
| Part Number | CST4403 |
| Same-Size Versions (Ordering Table) | 3 wire: CST4403; 4 wire: CST4404; less blocks: CST4400 |
| Packaging Type | Box |
| Shipping Weight | 38 lbs (17.24 kg) |
| Finish | Recoatable smooth ANSI 61 gray powder coating on cover and enclosure |
| Locking | Padlocking hasp |
| Material | Mild steel, formed and spot welded |
| Knockouts | Series of knockouts on each side |
| Steel Gauge | 14 gauge |
| Material / Colour | Steel/Gray |
| Knockout Diameters (Per Drawing) | 0.88 in, 1.13 in, 1.38 in |
| Enclosure Type | Type 1 |
| Ingress Protection | IEC 60529, IP20 |
| Certification | CSA Certified |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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The ordering table lists 400/400 A (CU/AL) for CST4403, using splitter block reference CSBL400.
CST4403 is the 3-wire version. Its 4-wire counterpart in the same size is CST4404.
48 in high x 10 in wide x 6 in deep (1,219 mm x 254 mm x 152 mm). The drawing shows a front opening of 46.75 x 9.61 in.
It is formed and spot welded from 14 gauge steel; the CST Series uses 14 gauge when the width is 8 in or more.
The data rates the CST Series as a Type 1 enclosure complying with IEC 60529, IP20; no outdoor rating is given for it.
The shipping weight is 38 lbs (17.24 kg), packed in a box.
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