Eaton Crouse-Hinds ECLK221 Coupling - Class I Div 1
Part Number: ECLK221
Quick Summary
Introducing the Eaton Crouse-Hinds ECLK221 coupling, a flexible explosionproof conduit connector for hazardous locations. Rigid fittings crack or leak under vibration, moisture, or temperature swings, causing downtime and costly rework. It complies with NEC/CEC and is rated Class I, Division 1 and Class II, Division 1, with UL certifications for hazardous locations. This rugged, compliant design enables fast installation, reliable sealing, and durable operation, delivering safety, uptime, and cost savings for industrial automation, oil and gas, and chemical processing environments.
Product Information
Extended Description
ECLK221 Eaton Crouse-Hinds: Eaton Crouse-Hinds series ECLK coupling, 21" flexible length, Male connection one end, female connection one end, Forged brass, 3/4" trade size
Product Name
Eaton Crouse-Hinds series ECLK coupling
Catalog Number
ECLK221
Product Length/Depth
25.13 in
Product Height
1.88 in
Product Width
1.88 in
Product Weight
4.45 lb
UPC
782274260907
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class II, Division 1 Class III
Gender
Male connection one end, female connection one end
Flexible length
21"
Trade size
3/4"
Material
Forged brass
Crouse-Hinds series EC Explosionproof Couplings catalog page
EC Explosionproof Couplings UL certification
EC Explosionproof Couplings UL certification
Eaton Specification Sheet - ECLK221
ECLK221 is an explosionproof coupling for hazardous locations, delivering a 21" flexible length, 3/4" trade size, and forged brass construction. This combination reduces installation time and the need for additional fittings, supporting safer, more reliable conduit runs in harsh environments. In practice, electricians experience fewer leakage points and quicker commissioning, directly impacting plant uptime and maintenance costs. The flexible length accommodates space constraints and misalignment, enabling cleaner duct runs and safer terminations in cramped electrical rooms and outdoor installations. The forged brass material provides corrosion resistance and durability, extending service life in chemical, oil, and gas facilities while maintaining duct integrity and compliance with industry standards. Compatibility with EC explosionproof couplings ensures consistent performance across Eaton Crouse-Hinds product families, simplifying procurement and stock management for maintenance teams. This design also addresses common objections around ruggedness and installation speed by delivering a tested, certified solution with UL listings and NEC/CEC compliance.
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FAQs
ECLK221 uses a male/female end configuration with a 3/4" trade size and a 21" flexible length, facilitating quick routing in confined spaces. Ensure proper termination within NEC/CEC guidelines, use approved gaskets/seals, and verify compatibility with surrounding EC explosionproof fittings. When mounting, allow for the required bend radius and avoid excessive torque that could loosen seals. This helps maintain environmental sealing and prevents arcing or moisture ingress in hazardous locations.
ECLK221 is designed for hazardous locations and is listed under NEC/CEC standards with NEC hazardous ratings Class I, Division 1. UL certifications further validate its suitability for these environments. The forged brass construction plus explosionproof design minimizes ignition risk, while the 21" flexible length accommodates complex conduit routing typical in refineries, chemical plants, and offshore installations, helping maintain safety and uptime.
Yes. The ECLK221 carries NEC/CEC classifications that cover Class II, Division 1 and Class III environments in addition to Class I, Division 1. This makes the coupling versatile for mixed-use facilities such as chemical processing plants, mining, and textiles where multiple hazardous location classes may be present. UL certifications support its use across these classifications, simplifying procurement for multi-zone sites.
Certification documentation includes UL certification pages for EC Explosionproof Couplings and Eaton’s specification sheets for ECLK221. These documents validate compliance with hazardous-location standards and provide installation guidance. Access to the Eaton spec sheet (ECLK221.pdf) and UL certification references helps engineers verify approvals before field deployment and ensures alignment with project compliance requirements.
The ECLK221’s 21" flexible length and forged brass construction reduce commissioning time and service outages by enabling quicker, seal-tight terminations in harsh environments. Its NEC/CEC compliance and UL listings lower the risk of noncompliance penalties and unexpected repairs. Over a facility’s lifecycle, this translates to lower maintenance costs, fewer rework incidents, and improved uptime in hazardous-area conduit systems.