Eaton TP451 Square Outlet Box - NEC/CEC, 4 in Steel
Part Number: TP451
Quick Summary
The Eaton TP451 square outlet box provides a robust four-inch enclosure for electrical installations in industrial facilities. In practice, installers often struggle with limited knockout options and mounting versatility; this model addresses that with welded steel construction and a comprehensive array of side and bottom knockouts to simplify layout. It meets NEC/CEC standards and Ordinary/Non-Hazardous location requirements, with Canadian certification options available to streamline multinational projects. For procurement teams, the 30.3 cubic inch capacity and 4 inch box size translate to predictable bill of materials and faster project turnover, while the VMS bracket style and conduit-ready design reduce installation time and field adjustments. This combination supports reliable, compliant enclosures across demanding industrial environments.
Product Information
Extended Description
TP451 Eaton: Eaton Crouse-Hinds series Square Outlet Box, (2) 1/2", (2) 1/2", (1) 3/4" E, 4", VMS, Conduit (no clamps), Welded, 2-1/8", Steel, (6) 1/2", (3) 1/2", (1) 3/4" E, 30.3 cubic inch capacity
Product Name
Eaton Crouse-Hinds series square outlet box
Catalog Number
TP451
UPC
786189104516
Product Length/Depth
4 in
Product Height
2.13 in
Product Width
4 in
Product Weight
0.96 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
VMS
Construction
Welded
Side knockouts
(6) 1/2 in, (3) 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 Canadian certification
4-Inch Steel Square Outlet Boxes, Covers, Extension Rings Canadian certification
Steel Outlet Boxes for Electrical Systems
Steel Outlet Boxes for Electrical Systems
Feature → Business Impact → Application: The TP451 uses a 4" square steel box with welded construction, delivering a rugged enclosure that minimizes field repairs and rework, reducing downtime on critical machine lines and panels. This translates to improved installation efficiency and long-term reliability for control cabinets in manufacturing facilities. Feature → Business Impact → Application: Conduit routing without clamps simplifies wiring runs, cutting hardware costs and accelerating panel builds in electrical rooms and process lines. Feature → Business Impact → Application: VMS bracket style provides flexible mounting options, enabling quick adapter choices for varied enclosure configurations in machine guarding and panel houses. Feature → Business Impact → Application: Knockouts include six 1/2" side, three 1/2" side, one 3/4" E, plus bottom knockouts with multiple 1/2" and E sizes, delivering installation versatility for complex conduit layouts and future expansion. Feature → Business Impact → Application: 30.3 cubic inch capacity supports multiple conductors while maintaining a compact footprint, reducing enclosure space requirements in restricted electrical rooms and control panels. Feature → Business Impact → Application: NEC/CEC compliance and Ordinary/Non-Hazardous area suitability provide regulatory assurance for both US and international projects, lowering risk and avoiding costly retrofits. Feature → Business Impact → Application: Canadian certification options, when needed, simplify cross-border procurement and compliance audits for multinational operations. Feature → Business Impact → Application: 4" x 4" footprint and 0.96 lb weight facilitate handling and on-site installation in tight spaces, enabling faster assembly on production lines and retrofit projects.
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FAQs
TP451 is a 4" square steel outlet box designed for industrial control panels and enclosures. It features welded construction, multiple knockouts for side and bottom wiring, and a VMS bracket style for flexible mounting. Its conduit-ready design (no clamps) supports rapid wiring runs and straightforward integration with Eaton and third-party enclosure systems.
The TP451 measures 4 inches in length and width, with a height of 2.13 inches. It provides a 30.3 cubic inch internal capacity, and weighs approximately 0.96 lb. The box includes side knockouts (six 1/2 in, three 1/2 in, one 3/4 in E) and bottom knockouts (two 1/2 in, two 1/2 in, one 3/4 in E), supporting versatile conduit configurations.
The TP451 is suited for ordinary/non-hazardous locations and adheres to NEC/CEC standards. It supports compliant electrical installations in industrial facilities, with Canadian certification options available to meet cross-border project requirements and audits.
The TP451 is NEC/CEC compliant and classified for Ordinary/Non-Hazardous locations. Canadian certification options are available through UL-listed resources, aiding multi-region projects. This combination reduces the need for rework when expanding installations across US and Canadian facilities, ensuring regulatory alignment with minimal downtime.
Conduit routing without clamps reduces hardware and labor costs, while welded steel construction enhances long-term durability. The 4" box size and VMS bracket style enable quick mounting and future reconfigurations. Overall, teams can achieve faster installations, simpler maintenance checks, and lower lifecycle costs in busy production environments.