Eaton TP444MSB Square Outlet Box - 4-Inch Steel NEC/CEC
Part Number: TP444MSB
Quick Summary
The Eaton TP444MSB Square Outlet Box is a 4-inch square steel enclosure designed for reliable electrical installations in ordinary, non-hazardous locations. This square outlet box helps engineers and installers address common wiring challenges, such as limited knockout options and insufficient capacity, by offering a robust welded steel body and flexible knockouts. It carries NEC/CEC compliance essentials and is supported by Canadian certification references to streamline cross-border projects. With a practical 22 cubic inch capacity, NM clamps, and MSB brackets, it delivers business value through faster installation, better cable management, and long-term durability for control panels and distribution enclosures. For projects prioritizing safety, compliance, and total cost of ownership, this enclosure aligns with standard industrial practices and procurement goals.
Product Information
Extended Description
TP444MSB Eaton: Eaton Crouse-Hinds series Square Outlet Box, (1) 1/2", 4", MSB, 4, NM clamps, Welded, 1-1/2", Steel, (4) 1/2", (2) 1/2", (1) 3/4" E, 22.0 cubic inch capacity
Product Name
Eaton Crouse-Hinds series square outlet box
Catalog Number
TP444MSB
UPC
662279019741
Product Length/Depth
6 in
Product Height
4 in
Product Width
1.5 in
Product Weight
0.81 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Box size
4"
Capacity
22 cubic in
Depth
1-1/2"
Conduit/cable
NM clamps
Bracket style
MSB
Construction
Welded
Side knockouts
(4) 1/2 in, (2) 1/2 in, (1) 3/4 in E
Bottom Knockouts
(1) 1/2 in
Cable knockouts
4
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 - TP444MSB
Eaton Specification Sheet - TP444MSB
Feature → Business Impact → Application: The TP444MSB uses welded steel construction for rugged durability, which reduces maintenance and rework in vibration-prone environments, improving system uptime in control cabinets and electrical rooms. This translates to lower lifecycle costs and faster commissioning in industrial facilities where reliability matters. Feature → 22 cubic inch capacity paired with (4) 1/2 in and (1) 3/4 in E side knockouts plus a bottom knockout and 4 cable knockouts provides flexible cable routing and ample room for NM clamps, enabling cleaner wiring layouts in small control panels and junction boxes. Feature → MSB bracket style and NM clamps ensure straightforward mounting and compatibility with common accessories, accelerating installation and minimizing field customization. Feature → Ordinary/Non-Hazardous Location rating and NEC/CEC standards support compliant wiring in typical manufacturing, food processing, and facility infrastructure environments, reducing questions during audits and inspections. Feature → 6 in length, 4 in height, and 1.5 in width combined with 0.81 lb weight offer a balance of rigid protection and ease of handling, enabling faster service calls and efficient stock management for maintenance teams. Industry context → The combination of welded steel, precise knockouts, and standard mounting compatibility makes TP444MSB a go-to choice for turnkey enclosures in industrial automation and electrical distribution projects, reducing vendor variety and simplifying procurement.
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FAQs
TP444MSB is designed for NM cable clamps and includes side knockouts (four 1/2 in, two 1/2 in, one 3/4 in E) plus a bottom knockout and four cable knockouts, all within a welded steel 4" box. Use the MSB bracket for secure mounting and route NM cables through the provided knockouts, ensuring clearance for clamps and connectors to meet NEC/CEC requirements.
The box measures 6 in in length, 4 in in height, and 1.5 in in width, with a 22 cubic inch internal capacity and a weight of about 0.81 lb. The side knockouts total four 1/2 in, two additional 1/2 in, and one 3/4 in E knockout; bottom has one 1/2 in knockout, plus four cable knockouts overall.
Yes. The TP444MSB is rated for Ordinary/Non-Hazardous Locations and complies with NEC/CEC standards, making it appropriate for standard industrial control panels, junction boxes, and general wiring in manufacturing and facility infrastructure settings.
The enclosure is NEC/CEC compliant. Canadian certification references are available via Eaton’s documentation and UL-related pages linked in the product downloads, supporting cross-border installations and formal verification for non-hazardous environments.
Expected benefits include faster installation due to the MSB mounting and NM clamp compatibility, reduced field modification, and lower lifecycle costs from welded steel construction that resists corrosion and vibration. The 22 cu in capacity and flexible knockouts enable cleaner wiring, improved inspection outcomes, and long-term reliability in control panels and electrical infrastructure.