The CSB73 is a 70 A NEMA/CSA Type 1 mild steel splitter box with factory installed 3-wire splitter blocks, measuring 12 in high by 10 in wide by 4 in deep (305 x 254 x 102 mm). The CSB series ordering table rates this size at 70/70 A (copper/aluminum) and lists CSBL125B as its splitter block reference. It is intended for electricians and contractors tapping indoor service into multiple circuits.
The CSB series is designed for indoor distribution of up to 600 A (max) service at 600 V max, using either 3 or 4 wires, with 75 °C conductor ampacity permitted. The same enclosure is offered as CSB74 with 4-wire splitter blocks and as CSB70 without blocks.
The box is formed and spot welded from steel (the series uses 14 or 16 gauge; the 14 gauge note in the ordering table applies to the 600 A sizes). A hinged door is secured with a screw and provides a padlocking hasp, and a series of knockouts is provided on each side. The manufacturer drawing shows a 12.25 in x 10.25 in door, a 11.89 in x 9.75 in door opening, an overall depth of 4.06 in and back mounting holes spaced 9.00 in x 7.00 in. The enclosure and door are finished in ANSI 61 gray powder coating.
The series carries CSA Type 1 and complies with IEC 60529 IP20. The CSB73 is REACH and RoHS compliant, ships in a box and has a shipping weight of 10 lbs (4.54 kg). Splitter blocks and grounding kits are listed as series accessories.
| Series | CSB Series - Type 1 Mild Steel Splitter Box |
| Cover Type | Hinged door with screw |
| Application | Indoor distribution of up to 600 A (max) service (600 V max) using 3 or 4 wires (series) |
| Description | Splitter Box, 70A - 12 x 10 x 4 - Steel/Gray |
| Configuration | 3 wire, factory installed splitter blocks |
| Short Description | SPLITTER BOX 12X10X4, 70A |
| Series Accessories | Splitter Blocks, Grounding Kits |
| Depth | 4.00 in (102 mm) |
| Width | 10.00 in (254 mm) |
| Height | 12.00 in (305 mm) |
| Size (H X W X D) | 12 in x 10 in x 4 in (305 mm x 254 mm x 102 mm) |
| Door Size (Drawing) | 12.25 in H x 10.25 in W |
| Door Opening (Drawing) | 11.89 in H x 9.75 in W |
| Overall Depth (Drawing) | 4.06 in |
| Back Mounting Hole Spacing (Drawing) | 9.00 in x 7.00 in |
| 3 Wire Part No. | CSB73 |
| 4 Wire Part No. | CSB74 |
| Ampacity (CU/AL) | 70/70 A |
| Conductor Ampacity | 75 °C conductor ampacity permitted |
| Less Blocks Part No. | CSB70 |
| Series Maximum Service | 600 A max, 600 V max |
| Splitter Block Reference | CSBL125B |
| UPC | 623980263717 |
| UNSPSC | 39121324 |
| Part Number | CSB73 |
| Drawing Date | Nov. 4, 2020 |
| Packaging Type | Box |
| Shipping Weight | 10 lbs (4.54 kg) |
| Colour | Gray |
| Finish | ANSI 61 gray powder coating (enclosure and cover) |
| Locking | Padlocking hasp |
| Material | Mild steel |
| Knockouts | Series of knockouts on each side |
| Steel Gauge | 14 or 16 gauge (series; 14 gauge noted for 600 A sizes) |
| Construction | Formed and spot welded |
| Knockout Diameters (Drawing) | 0.88 in, 1.13 in, 1.38 in |
| Mounting Hole Diameter (Drawing) | 0.25 in |
| Enclosure Rating | CSA Type 1 |
| Ingress Protection | IEC 60529, IP20 |
| CSA | CSA Type 1 |
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Yes. The CSB73 has factory installed 3-wire splitter blocks; the ordering table lists CSBL125B as the splitter block reference for this size.
The ordering table rates this size at 70/70 A (CU/AL). The CSB series is designed for indoor service up to 600 A max at 600 V max, with 75 °C conductor ampacity permitted.
12 in H x 10 in W x 4 in D (305 x 254 x 102 mm). The drawing shows a 12.25 in x 10.25 in door and a 11.89 in x 9.75 in door opening.
Yes. The hinged door closes with a screw and includes a padlocking hasp.
The CSB series is designed for indoor distribution and carries CSA Type 1, complying with IEC 60529 IP20.
The same enclosure is offered as CSB74 with 4-wire splitter blocks and as CSB70 without blocks.
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