Eaton 657 EMT Compression Connector - Straight/Steel NEC/CEC
Part Number: 657
Quick Summary
Eaton Crouse-Hinds EMT compression connector provides secure EMT terminations for industrial electrical installations in panels and conduit runs. A common challenge is achieving reliable terminations quickly in tight spaces without compromising code compliance. This design aligns with NEC/CEC standards and Ordinary/Non-Hazardous location classifications, with Canadian certifications available, delivering safe, scalable installations. Engineers and procurement teams benefit from a robust 3" trade size, straight compression style, and durable steel construction, while maintenance teams appreciate consistent performance and faster install cycles across multiple projects.
Product Information
Extended Description
657 Eaton: Eaton Crouse-Hinds series EMT compression connector, EMT, Straight, Non-insulated, Steel, Threadless, 3"
Product Name
Eaton Crouse-Hinds series EMT compression connector
Catalog Number
657
UPC
784564106575
Product Length/Depth
5.7 in
Product Height
6.5 in
Product Width
4.1 in
Product Weight
3 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Conduit type
EMT
Connector type
Straight
Style
Compression
Insulator
Non-insulated
Trade size
3"
Thread
Threadless
Material
Steel
Eaton Crouse-Hinds 657 3D drawing
Crouse-Hinds series Connectors and Couplings - EMT catalog page
Connectors and Couplings - EMT Canadian certification
Connectors and Couplings - EMT Canadian certification
Eaton Specification Sheet - 657
The feature set for the Eaton Crouse-Hinds EMT compression connector centers on reliable, fast terminations that improve overall installation efficiency and compliance. Compression style provides a secure 360-degree grip on EMT conduit, reducing loosening risk in vibration-prone environments and improving ground continuity for panel wiring. The straight connector format simplifies alignment in tight spaces and speeds splicing in control cabinets, minimizing field rework. The non-insulated steel design offers durable protection against impact and incidental contact, while the 3" trade size accommodates common EMT runs in industrial floors and equipment rooms. Compatibility with the Crouse-Hinds line ensures uniformity across assemblies, and NEC/CEC compliance coupled with Ordinary/Non-Hazardous location classifications supports regulatory audits and ongoing safety. Real-world installations have reported faster conduit pull-through, lower commissioning time, and reduced need for auxiliary accessories, delivering measurable cost and schedule benefits.
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FAQs
The Eaton 657 is a straight EMT compression connector designed for a 3 inch trade size EMT conduit. It uses a threadless, compression-fit mechanism to secure the conduit without threads. Typical installation steps include preparing the EMT end (de-burring), inserting the conduit fully into the connector, and tightening the compression sleeve with the appropriate tool to achieve a full 360-degree contact. Ensure surfaces are clean and the connection is inspected for full seating and security before energizing the circuit.
Compression-style EMT connectors like the 657 provide a continuous, 360-degree grip on the conduit, distributing mechanical load evenly and reducing the chance of loosening due to vibration. This results in more reliable electrical contact and ground continuity over time, with fewer maintenance interruptions. The absence of threaded components also minimizes risk of cross-threading during installation and simplifies field assembly in constrained spaces.
Yes. The 657 straight compression connector is specified for Ordinary/Non-Hazardous Locations and is manufactured to NEC/CEC standards. This makes it suitable for general-purpose wiring in industrial facilities, control panels, and equipment rooms where standard conduit fittings are applicable. For projects requiring Canadian certification details, UL Canada listings and related certification reports are available through the provided documentation.
This connector is documented under NEC/CEC compliance and is listed for Ordinary/Non-Hazardous locations. In addition to standards compliance, Canadian certification reports from UL (UL Canada) are available, and a 3D CAD drawing package plus catalog pages provide engineering validation for design work. These resources support regulatory audits and quality assurance during procurement and installation.
Choosing the Eaton 657 offers faster terminations, reduced field rework, and improved reliability due to its compression design and 360-degree conduit grip. The steel, non-insulated construction provides durable service in general-use environments, while compatibility with the Crouse-Hinds family ensures consistent performance across conduit fittings. Added design resources, including CAD drawings and catalog pages, accelerate project design, procurement, and commissioning, delivering measurable time and cost savings over project lifecycles.