Eaton TP639 Octagon Concrete Box - NEC/CEC Certified
Part Number: TP639
Quick Summary
The Eaton TP639 octagon concrete box provides durable junctions for electrical installations in industrial enclosures. Installers often contend with corrosion, limited knockouts, and uncertain fit in concrete walls. UL-certified, NEC/CEC compliant, and rated for ordinary/non-hazardous locations, TP639 helps ensure safety and compliance. This combination reduces installation time and long-term maintenance costs, while delivering reliable, code-ready steel box solutions for panel builders and electrical contractors. Designed for steel enclosures and concrete walls, TP639 integrates with standard conduit fittings and supports efficient field wiring. Its 41 cubic inch capacity and double-row knockouts streamline conduit planning and interior wiring layouts. For projects in industrial facilities, TP639 aligns with NEC/CEC guidelines while offering proven protection in ordinary locations.
Product Information
Extended Description
TP639 Eaton: Eaton Crouse-Hinds series Octagon Concrete Box, 4", 3-1/2", Steel, 1" and 3/4" double row, 41.0 cubic inch capacity
Product Name
Eaton Crouse-Hinds series octagon concrete box
Catalog Number
TP639
UPC
786189106398
Product Length/Depth
4 in
Product Height
3.5 in
Product Width
4 in
Product Weight
0.92 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Material
Steel
Box size
4"
Depth
3-1/2"
Side knockouts
1 in and 3/4 in double row
Capacity
41 cubic in
Crouse-Hinds series 4-Inch Steel Octagon Concrete Boxes catalog page
4-Inch Steel Octagon Concrete Boxes UL certification
4-Inch Steel Octagon Concrete Boxes UL certification
Eaton Specification Sheet - TP639
Eaton Specification Sheet - TP639
Feature: Steel construction Provides high durability and corrosion resistance, extending service life in demanding environments. Business Impact: Reduces maintenance cycles and replacement costs, improving total cost of ownership. Application: Ideal for concrete-wall installations in industrial facilities where long-term reliability is essential. Feature: 4-inch box size with 41 cu in capacity Delivers ample interior space for splices and conductors without oversizing. Business Impact: Supports compliant wiring density and reduces the need for additional enclosures. Application: Suitable for panel feeder connections in standard facility layouts. Feature: Side knockouts in a 1 inch and 3/4 inch double row Flexible knockout arrangements streamline routing and conduit fitting alignment. Business Impact: Speeds field wiring and minimizes the number of adapters or punch-outs. Application: Beneficial for electricians deploying mixed conduit types in tight spaces. Feature: Weight and handling at 0.92 lb Lightweight yet sturdy steel enclosure simplifies handling on-site and during installation. Business Impact: Improves installation efficiency and reduces labor fatigue. Application: Helpful for overhead or hard-to-reach placements in plant environments. Feature: Certifications and compliance NEC/CEC, UL-listed Installation complies with major electrical standards, reducing project risk. Business Impact: Lowers risk of non-compliance penalties and rework. Application: Essential for code-driven projects in Ordinary/Non-Hazardous locations. Insight: This TP639 box is designed to work with standard Crouse-Hinds components, helping engineers and installers optimize part counts and scheduling, while ensuring compatibility with common conduit fittings used across industrial facilities.
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FAQs
The TP639 is designed for electrical junctions in concrete walls within ordinary, non-hazardous locations. Its 4-inch steel octagon box offers 41 cubic inches of interior space, accommodating multiple conductors and splices. With 1 inch and 3/4 inch double-row knockouts, it accepts standard conduit fittings and fits with typical Crouse-Hinds accessory line for efficient field wiring.
TP639 is NEC/CEC compliant and UL-listed for metallic outlet boxes, ensuring electrical code alignment and safety. It is rated for ordinary/non-hazardous locations, which helps installers meet regulatory requirements while avoiding unnecessary certifications for hazardous environments. This combination reduces project risk and supports code-ready installations.
The TP639 is a 4-inch box with a 3-1/2 inch depth and a 4 by 4 inch footprint. It provides 41 cubic inches of interior capacity and weighs approximately 0.92 pounds, delivering a compact yet functional enclosure suitable for standard conduit layouts in concrete-wall applications.
TP639 is rated for Ordinary/Non-Hazardous Locations and is intended for indoor or protected indoor environments. It is not specified for outdoor weather exposure or hazardous locations, so for outdoor or hazardous applications you should consider enclosures with appropriate IP/IEC ratings and hazard classifications.
The 1 inch and 3/4 inch double-row knockouts offer flexible conduit routing and easier alignment with standard fittings, reducing the need for additional adapters. This simplifies field wiring, shortens installation time, and minimizes punch-out work, which is especially beneficial in tight spaces common to industrial wall installations.