Eaton TP403 Square Outlet Box - 4-Inch, 30.3 cu in NEC/CEC
Part Number: TP403
Quick Summary
The Eaton TP403 Square Outlet Box protects wiring connections in industrial control panels and general electrical installations. Engineers often contend with limited space, multiple conduit options, and the need for durable enclosures that simplify wiring. This box meets NEC/CEC requirements and UL certification criteria, making it suitable for ordinary/non-hazardous locations, while its welded steel construction delivers long-term durability. Designed for quick installation and reliable performance, the TP403 pairs with standard 4-inch square footprints and Eaton Crouse-Hinds accessories to streamline project timelines and ensure regulatory compliance, reducing rework and owner risk. In addition to its robust knocked-out pattern, TP403 supports varied wiring schemes and installation environments, delivering predictable performance across control rooms, cabinets, and field enclosures.
Product Information
Extended Description
TP403 Eaton: Eaton Crouse-Hinds series Square Outlet Box, (2) 1/2", (2) 1/2", (1) 3/4" E, 4", 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
TP403
UPC
786189104035
Product Length/Depth
4 in
Product Height
2.13 in
Product Width
4 in
Product Weight
0.84 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)
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 - TP403
Eaton Specification Sheet - TP403
Feature: 4-inch square box size with 30.3 cubic inches capacity. Benefit: Provides ample space for splices and terminations while maintaining a compact footprint, reducing panel size and material costs. Application: Control panels and equipment junctions in automation facilities. Feature: Welded steel construction. Benefit: Delivers rugged durability essential for harsh industrial environments and long service life, minimizing maintenance. Application: Factory floors and outdoor-rated installations where vibration and impact are concerns. Feature: Conduit options with side and bottom knockouts (eight 1/2 in side, four 1/2 in side, one 3/4 in E; bottom two 1/2 in, two 1/2 in, one 3/4 in E). Benefit: Flexible wiring routes and faster commissioning with reduced need for clamps or adapters. Application: Field wiring runs and panel upgrades. Feature: Conduit (no clamps) specification. Benefit: Simplifies assembly, lowers hardware costs, and shortens installation time. Application: Upright installations in confined spaces. Feature: Compliance and certification (NEC/CEC, UL). Benefit: Regulatory confidence, risk reduction, and easier audits for non-hazardous locations. Application: Industrial and commercial projects requiring verified standards. Feature: Material: Steel; Weight: 0.84 lb. Benefit: Lightweight yet sturdy enclosure that eases handling and reduces shipping costs. Application: On-site replacements and modular installations. Feature: Compatibility with standard Eaton Crouse-Hinds accessories. Benefit: Streamlined procurement and scalability across multiple enclosures. Application: Systems with repeatable 4-inch box footprints.
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FAQs
TP403 provides versatile conduit routing via side and bottom knockouts, including eight 1/2 in and four 1/2 in side entries, plus a 3/4 in E knockout, plus bottom entries (2x 1/2 in, 2x 1/2 in, 1x 3/4 in E). It is a welded steel 4-inch box designed for fast setup without clamps, ideal for compact control panels and junctions.
Yes. The TP403 is designed for Ordinary/Non-Hazardous Locations and complies with NEC/CEC standards. It also carries UL certification, providing documented safety and performance assurances for industrial and commercial applications, reducing regulatory risk during audits and maintenance.
Typical applications include control panel enclosures, equipment junctions in automation systems, and field wiring terminations where a durable 4-inch steel box with multiple knockout options is required. Its 30.3 cubic inch capacity supports splices and terminations for diverse conduit configurations in non-hazardous environments.
TP403 features a 4-inch square box with a width of 4 inches, height of 2.13 inches, and a depth of 2-1/8 inches. It has a capacity of 30.3 cubic inches and weighs approximately 0.84 pounds, making it a compact yet sturdy enclosure suitable for panel upgrades and compact installations.
TP403 is designed to work within the Eaton Crouse-Hinds steel square box family, ensuring compatibility with standard 4-inch footprints, covers, and mounting hardware. This integration simplifies procurement, reduces inventory complexity, and accelerates project timelines by reusing existing components across multiple enclosures.