Eaton TP404MSB Square Outlet Box 4-Inch - NEC/CEC
Part Number: TP404MSB
Quick Summary
The Eaton TP404MSB Square Outlet Box is a rugged 4-Inch enclosure designed for reliable electrical terminations in industrial applications. Engineers often grapple with limited mounting depth and crowded backplanes; the welded steel body, 1-1/2 inch depth, and versatile knockouts simplify wiring in tight control panels. This unit aligns with NEC/CEC standards for ordinary/non-hazardous locations and provides UL certification documentation for traceable compliance. With a 22 cubic inch capacity and MSB bracket style, it reduces accessory counts and speeds code-compliant installations in service panels and equipment racks.
Product Information
Extended Description
TP404MSB Eaton: Eaton Crouse-Hinds series Square Outlet Box, (2) 1/2", (2) 1/2", (1) 3/4" E, 4", MSB, Conduit (no clamps), Welded, 1-1/2", Steel, (8) 1/2",(4) 1/2", (1) 3/4" E, 22.0 cubic inch capacity
Product Name
Eaton Crouse-Hinds series square outlet box
Catalog Number
TP404MSB
UPC
662279019277
Product Length/Depth
6 in
Product Height
4 in
Product Width
1.5 in
Product Weight
0.83 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Box size
4"
Capacity
22 cubic in
Depth
1-1/2"
Conduit/cable
Conduit (no clamps)
Bracket style
MSB
Construction
Welded
Side knockouts
(8) 1/2 in, (4) 1/2 in, (1) 3/4 in E
Bottom Knockouts
(2) 1/2 in, (2) 1/2 in, (1) 3/4 in E
Material
Steel
Crouse-Hinds series 4-Inch Steel Square Boxes and Covers catalog page
4-Inch Steel Square Outlet Boxes, Covers, Extension Rings UL certification
4-Inch Steel Square Outlet Boxes, Covers, Extension Rings UL certification
Eaton Specification Sheet - TP404MSB
Eaton Specification Sheet - TP404MSB
Feature: Welded steel construction delivers rugged durability and improved impact resistance in rough environments. Business Impact: Fewer panel repairs, lower maintenance costs, and extended service life in demanding industrial settings. Application: Suitable for control panels, machine enclosures, and any installation where vibration or abuse is a concern. Feature: 22 cubic inch capacity in a 4-inch square box. Business Impact: Sufficient space for conductors, splices, and terminations reduces the need for additional enclosures and minimizes wiring complexity. Application: Panels with multiple feeds and device terminations in manufacturing lines. Feature: Side and bottom knockouts for multiple conduits. Business Impact: Flexible wiring paths speed up installation and adaptation to field conditions, lowering labor time. Application: Equipment racks and control panels requiring versatile routing. Feature: MSB bracket style and conduit (no clamps) design. Business Impact: Faster mounting, fewer accessory parts, and lower installation hardware costs. Application: Retrofit and new builds where quick, reliable mounting is essential. Feature: NEC/CEC compliance with ordinary location classification; UL certification documentation available. Business Impact: Simplified regulatory approvals and auditable safety compliance. Application: Industrial enclosures in non-hazardous environments across machine shops and process lines. Feature: Material and dimensional fit—steel construction, 6 in length, 4 in box size, 1-1/2 in depth. Business Impact: predictable integration with standard 4-inch square box systems and backbox compatibility. Application: Control panels and equipment housings using standard modular components.
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FAQs
TP404MSB fits standard 4-Inch steel square box footprints and uses the MSB mounting bracket, enabling straightforward integration with existing backplanes and rack systems. The welded construction and common knockout pattern support quick wiring runs, reducing retrofit time and minimizing changes to surrounding infrastructure.
Key specs include a 22 cubic inch capacity, 6 inch overall length, 4 inch box size, and 1-1/2 inch depth. Side knockouts total eight 1/2 inch, four 1/2 inch, and one 3/4 inch E; bottom knockouts are two 1/2 inch, two 1/2 inch, and one 3/4 inch E. Construction is welded steel for durability.
Yes, the TP404MSB is designed for ordinary/non-hazardous locations and aligns with NEC/CEC standards. UL certification documentation is available, providing traceable compliance evidence for audits and regulatory reviews in industrial facilities.
Absolutely. With 22 cu in of internal space, dual side and bottom knockouts, and sealed welding, the TP404MSB supports multiple conductors, splices, and device terminations while maintaining a compact footprint suitable for tight control panels and equipment housings.
The welded steel construction and MSB bracket design reduce installation time and hardware needs, lowering labor costs. The generous capacity minimizes the need for additional enclosures, while NEC/CEC compliance and UL documentation help avoid compliance-related downtime and audits, contributing to lower life-cycle costs in manufacturing environments.