Eaton TP438 Square Outlet Box - 4-Inch Steel, NEC/CEC
Part Number: TP438
Quick Summary
Eaton TP438 Square Outlet Box provides a rugged steel enclosure for 4-inch square electrical installations. When space is tight and conduit configurations must be precise, a box with standardized knockouts and exact depth reduces rework and field errors. This model carries NEC/CEC compliance and UL certification for ordinary locations, delivering code-aligned performance you can trust in control panels and field installations. With a 30.3 cubic inch capacity and drawn steel construction, TP438 supports compact wiring layouts while maintaining durability. The 2-1/8 inch depth fits shallow enclosures, and the four side knockouts plus bottom knockouts streamline conduit routing. In short, it speeds installation, improves reliability, and lowers maintenance costs in industrial environments.
Product Information
Extended Description
TP438 Eaton: Eaton Crouse-Hinds series Square Outlet Box, (3) 1/2", (2) 3/4", 4", Conduit (no clamps), Drawn, 2-1/8", Steel, (4) 1/2", (6) 1/2", (1) 3/4" C, 30.3 cubic inch capacity
Product Name
Eaton Crouse-Hinds series square outlet box
Catalog Number
TP438
UPC
786189104387
Product Length/Depth
4 in
Product Height
2.13 in
Product Width
4 in
Product Weight
1 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
Drawn
Side knockouts
(4) 1/2 in, (6) 1/2 in, (1) 3/4 in C
Bottom Knockouts
(3) 1/2 in, (2) 3/4 in
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 - TP438
Eaton Specification Sheet - TP438
Feature: 4-inch square steel box with a 30.3 cubic inch capacity; Business Impact: Provides ample internal space for splices, terminal blocks, and wiring bundles, reducing the need for multiple boxes and associated install time; Application: Ideal for control panels, machine junctions, and compact enclosures where space is at a premium. Feature: Knockout arrangement includes side knockouts (four 1/2 in, six 1/2 in, and one 3/4 in C) plus bottom knockouts (three 1/2 in, two 3/4 in); Business Impact: Flexible routing options support diverse conduit configurations, speeding up wiring diagrams and field adaptation; Application: Suitable for standard industrial conduit layouts in non-hazardous environments. Feature: Conduit entries configured with no clamps; Business Impact: Reduces accessory costs and simplifies field installation, cutting total installed cost; Application: Preferred when clamps are provided by other enclosure components or when a clampless run is desired. Feature: Drawn steel construction; Business Impact: Delivers durable enclosure with smooth interiors that minimize snagging and make wire management easier; Application: Harsh factory floors and panel assemblies where longevity matters. Feature: Dimensions and weight 4 in x 4 in x 2-1/8 in, 1 lb; Business Impact: Lightweight yet sturdy, enabling quicker handling and reduced labor time during installation and maintenance; Application: Routine mounting in control cabinets and equipment racks. Feature: Compliance and standards NEC/CEC, Ordinary/Non-Hazardous Locations, UL certification; Business Impact: Provides regulatory alignment and traceable safety claims, reducing audit findings and project risk; Application: Widely applicable across non-hazardous industrial facilities and electrical installations.
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FAQs
TP438 provides side knockouts: four 1/2 in, six 1/2 in, and one 3/4 in C, plus bottom knockouts: three 1/2 in and two 3/4 in. Use the appropriate knockout pattern to match your conduit size and routing plan. The enclosure is specified as Conduit (no clamps), so clamps or fittings must be added as needed to secure conductors and maintain enclosure integrity.
Yes, TP438 is rated for Ordinary/Non-Hazardous Locations. It adheres to NEC/CEC standards and carries UL certification for steel square outlet boxes, ensuring code-compliant installation in typical industrial environments without hazardous classifications.
The TP438 is a 4-inch square box with a 30.3 cubic inch capacity and a depth of 2-1/8 inches. Its 4x4 inch footprint supports dense wiring bundles in compact spaces, while the ample internal volume accommodates splices, terminals, and connectors without overcrowding, facilitating cleaner, safer terminations.
With a 2-1/8 inch depth, 4 inch box size, drawn steel interior, and standardized knockouts, TP438 minimizes field adaptations and rework. The absence of clamps in the conduit path reduces accessory purchases, while the lightweight 1 lb weight eases handling and reduces labor during mounting and wiring in control cabinets.
TP438 improves maintenance predictability by using a standardized, code-compliant enclosure that reduces wiring errors and enclosure mismatches. The dependable steel construction and UL/NEC/CEC alignment lower compliance risk and rework costs, while the straightforward knockout layout speeds initial installation and future upgrades, delivering tangible cost savings over the product life cycle.