Eaton TP403REDMSB Square Outlet Box - Ordinary
Part Number: TP403REDMSB
Quick Summary
The Eaton TP403REDMSB square outlet box provides a durable, code-compliant enclosure for 4-inch installations in industrial control panels and harsh environments. Engineers often struggle with protecting conductors from dust and moisture while maintaining flexible knockout configurations and minimal field modification time. This unit meets NEC/CEC standards and is suitable for Ordinary/Non-Hazardous locations, with UL Canada certification documentation supporting supply chain and audit requirements. As part of Eaton's Crouse-Hinds steel square-box family, its welded construction, MSB bracket, and 30.3 cubic inch capacity enable compact, reliable wiring for complex control circuits and equipment feeds, even when using conduit without clamps. The bright red color aids visibility in crowded panels, improving installation speed and reducing misrouting risk.
Product Information
Extended Description
TP403REDMSB Eaton: Eaton Crouse-Hinds series Square Outlet Box, (2) 1/2", (2) 1/2", (1) 3/4" E, 4", MSB, Red, Conduit (no clamps), Welded, 2-1/8", Steel, (8) 1/2",(4) 1/2", (1) 3/4" E, 30.3 cubic inch capacity
Product Name
Eaton Crouse-Hinds series square outlet box
Catalog Number
TP403REDMSB
UPC
662279019871
Product Length/Depth
4 in
Product Height
2.13 in
Product Width
4 in
Product Weight
0.8 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Box size
4"
Capacity
30.3 cubic in
Depth
2-1/8"
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
Color
Red
Material
Steel
Crouse-Hinds series 4-Inch Steel Square Boxes and Covers catalog page
4-Inch Steel Square Outlet Boxes, Covers, Extension Rings Canadian certification
4-Inch Steel Square Outlet Boxes, Covers, Extension Rings Canadian certification
Eaton Specification Sheet - TP403REDMSB
Eaton Specification Sheet - TP403REDMSB
Feature: Welded, steel square outlet box with MSB bracket. Business Impact: Provides a rigid, mounting-ready core that minimizes field work and rework while ensuring alignment with panel rails. Application: Ideal for control panels and machine junctions in manufacturing floors where reliability and repeatable mounting are critical. Feature: Conduit connections described as Conduit (no clamps). Business Impact: Reduces hardware requirements and simplifies on-site wiring, cutting installation time and potential leak paths. Application: Fast, clamp-free conduit routing in tight enclosures or retrofit projects. Feature: Multiple knockouts on the sides and bottom, including (8) 1/2 in, (4) 1/2 in, (1) 3/4 in E side knockouts and (2) 1/2 in, (2) 1/2 in, (1) 3/4 in E bottom knockouts. Business Impact: Maximizes wiring options and reduces the need for additional fittings, lowering total installed cost. Application: Flexible for multi-circuit feeds and complex wiring layouts in control panels. Feature: 30.3 cubic inch capacity and 4 in box size with 2-1/8 in depth. Business Impact: Supports multi-conductor runs and device provisions without overcrowding, improving thermal performance and maintenance access. Application: Suits medium-density wiring in industrial equipment cabinets and junction boxes. Feature: Material and color: steel, red finish. Business Impact: Durable, corrosion-resistant enclosure with high visibility for safer, faster installations. Application: General purpose steel square boxes in ordinary locations across manufacturing and process environments. Feature: NEC/CEC compliance and Ordinary/Non-Hazardous area classification. Business Impact: Reduces compliance risk and simplifies code documentation for North American installations. Application: Suitable for standard electrical installations in non-hazardous industrial settings, with UL Canada certification support for audits and cross-border projects.
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FAQs
The TP403REDMSB provides side knockouts: eight 1/2 in, four 1/2 in, and one 3/4 in E along with bottom knockouts: two 1/2 in, two 1/2 in, and one 3/4 in E. These configurations offer flexible wiring layouts for multi-circuit feeds while maintaining a compact 4" square footprint and allowing conduit connections without clamps.
Yes. The TP403REDMSB is designed to meet NEC/CEC standards and is classified for Ordinary/Non-Hazardous Locations. It is a North American-ready enclosure, backed by UL Canada certification references, which supports compliance, audits, and cross-border sourcing in industrial facilities.
The TP403REDMSB measures 4 inches square with a depth of 2-1/8 inches and a capacity of 30.3 cubic inches. Its 4" box size and welded steel construction accommodate multiple conductors and devices while preserving access for maintenance and future wiring upgrades.
Yes. The MSB bracket is included for secure mounting within control panels or on backplanes. This simplifies alignment with panel rails, reduces installation time, and provides a rigid mounting foundation for reliable conduit routing and wiring protection in demanding environments.
You can access Eaton’s TP403REDMSB specification sheets at these sources: the Eaton PDF specification page at https://www.eaton.com/us/en-us/skuPage.TP403REDMSB.pdf and the steel-outlet-boxes spec guide at https://www.eaton.com/content/dam/eaton/products/conduit-cable-and-wire-management/crouse-hinds/spec-guide-forms/steel-outlet-boxes-specguideform.doc, which provide detailed dimensions, materials, and installation guidance.