Eaton 422 EMT Combination Coupling - NEC/CEC Standards
Part Number: 422
Quick Summary
The Eaton Crouse-Hinds EMT combination coupling provides a secure EMT-to-rigid conduit connection for industrial electrical installations. Mismatched fittings or loose connections frequently cause downtime and safety concerns in harsh environments. It is NEC/CEC compliant and suitable for Ordinary/Non-Hazardous Locations, helping you meet code requirements while supporting reliable, scalable distribution. Designed for fast installs and broad compatibility, this coupling simplifies procurement and reduces inventory with a single 1"-1" solution, delivering tangible business value through improved installation efficiency and long-term performance.
Product Information
Extended Description
422 Eaton: Eaton Crouse-Hinds series EMT combination coupling, EMT (set screw) to rigid (set screw), Zinc plated steel, Combination type, 1"-1"
Product Name
Eaton Crouse-Hinds series EMT combination coupling
Catalog Number
422
UPC
784564104229
Product Length/Depth
3 in
Product Height
1.5 in
Product Width
1.5 in
Product Weight
0.37 lb
Area classification
Ordinary/Non-Hazardous Locations
Standards type
NEC/CEC
Conduit type
EMT
Style
Combination
Combination type
EMT (set screw) to rigid (set screw)
Trade size
1"-1"
Material
Zinc plated steel
Crouse-Hinds series Combination Couplings - EMT catalog page
Combination Couplings - EMT Canadian certification
Combination Couplings - EMT Canadian certification
Eaton Specification Sheet - 422
Material and finish: Zinc-plated steel offers corrosion resistance in typical plant environments, extending service life and reducing maintenance costs. This translates to fewer field repairs and lower lifecycle costs when deployed in metal conduit systems. Application: ideal for outdoor or semi-enclosed electrical runs where moisture exposure is possible, yet mechanical integrity must be preserved. Compatibility and size: The 1"-1" trade size and combination EMT-to-rigid design decrease the need for multiple adapters, speeding up panel feeds and daisy-chained runs. Benefit: faster commissioning, easier stocking, and reduced risk of misfit components in critical installations. Installation and reliability: Set-screw securement ensures a robust grip on both EMT and rigid conduits, minimizing loosening from vibration or thermal cycling. Industry insight: in high-cycle environments, this reduces rework and supports compliant, safe operations under NEC/CEC requirements. Regulatory alignment and documentation: Feature-rich with NEC/CEC compliance and a documented product lineage, aiding inspection readiness and supplier traceability. Benefit: smoother audits and faster approvals. Compact form factor: At 3 in length with 1.5 in width and height, and a 0.37 lb weight, it fits tight enclosures and crowded panels. Application: ideal for dense electrical raceways and retrofit projects where space is constrained, yet code compliance remains non-negotiable.
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FAQs
The 422 coupling utilizes a set-screw design to secure EMT and rigid conduits of 1 inch nominal size. Align the conduits, tighten the set screws with a proper screwdriver or hex tool, and verify a perpendicular, flush fit. Ensure the underlying conduits are clean and free of burrs to prevent damage to the fitting or seals. Confirm that the assembly resides in Ordinary/Non-Hazardous locations per NEC/CEC. This approach minimizes rework and ensures a code-compliant, durable connection.
The 422 is designed specifically as an EMT-to-rigid combination coupling with a 1"-1" trade size. Its set-screw mechanism provides a secure grip on both EMT and rigid conduit runs, reducing the need for adapters. The zinc-plated steel construction supports standard industrial conduits, and the 3 in length helps span minor offsets while maintaining alignment in tight spaces.
Yes. The product is certified under NEC/CEC standards and classified for Ordinary/Non-Hazardous Locations, which supports compliance during inspections and installations. This makes it suitable for standard commercial and industrial environments where non-hazardous conditions prevail, eliminating the need for specialized explosion-rated fittings in typical machine rooms and panel boards.
The zinc-plated finish provides corrosion resistance, extending service life in humid or wash-down environments. The combination EMT-to-rigid design reduces the number of fittings required, speeding up installation and enabling easier maintenance. The secure set-screw connection improves vibration resistance, contributing to fewer loosening events during start-up or dynamic loads, and supporting reliable long-term conduit integrity.
By consolidating EMT and rigid connections into a single fitting, the 422 reduces inventory and simplifies procurement, lowering carrying costs. Faster installations translate to reduced labor time on projects and service calls, while the durable zinc plating lowers maintenance frequency. Together, these factors improve project turnaround, compliance confidence, and total cost of ownership in daily electrical distribution tasks.