Hammond CN4ST6404 400A 4-Wire 72x10x6 In Type 4/3R Steel Splitter Trough

The CN4ST6404 is a Type 4/3R mild steel splitter trough for 4-wire power distribution, rated 400/400 A (CU/AL) with factory-installed splitter blocks. It is aimed at electricians, contractors and facilities teams who need a gasketed, hinged-door trough to split a service into multiple branch taps indoors or outdoors.

The enclosure measures 72.00 in (1829 mm) high, 10.00 in (254 mm) wide and 6.00 in (152 mm) deep. The drawing shows a 71.97 x 9.97 in door, a 70.36 x 8.49 in door opening and an included 70.17 x 8.17 in inner panel.

Construction is formed and spot welded 14 gauge steel (the series uses 14 gauge when the width is 8 in or more), with smooth, continuously welded seams ground smooth and a formed lip on the enclosure to exclude flowing liquids and contaminants. It uses a seamless poured-in-place gasket. The cover and enclosure are finished in recoatable smooth ANSI 61 gray powder coating; the inner panel is finished in white powder coating and mounts on collar studs.

Door latches use a quarter-turn slot that requires a tool to open. Hinges are 304 stainless steel with stainless steel hinge pins, and the doors can be removed for modifications and are interchangeable. A hardware kit with panel mounting nuts and sealing washers for the wall mounting holes is included. The trough is CSA Certified Type 3R, 12, 4 and complies with IEC 60529, IP66. The series is designed for distribution of up to 600 A (max) service at 600 V max, with 75 °C conductor ampacity permitted.

Optional grounding kit CGK400 and splitter block reference CSBL400 apply to this size. The 3-wire version of the same size is CN4ST6403.