CST4200 is an empty 48 x 8 x 5 in splitter trough: the CST Series Type 1 mild steel housing supplied less blocks, for buyers who want the steel trough without factory-installed splitter blocks. It is intended for electricians, electrical contractors and facilities teams distributing a service to multiple loads in indoor locations.

Because CST4200 ships without splitter blocks, it gives the enclosure only; the ordering table lists splitter block reference CSBL225 for this size, and the CST Series lists splitter blocks and grounding kits as accessories. The same body is offered with factory-installed blocks as CST4203 (3 wire) and CST4204 (4 wire), rated 225/225 A CU/AL.

The trough is formed and spot welded from 14 gauge mild steel and measures 48 in high, 8 in wide and 5 in deep (1,219 mm x 203 mm x 127 mm). A series of knockouts is provided on each side, with 0.88, 1.13, 1.38, 2.50 and 3.00 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. CST4200 ships boxed at 25 lbs (11.34 kg), and the part is listed as RoHS and REACH compliant.