Eaton ENRB21202 M4 Receptacle - Group B Hazardous
Part Number: ENRB21202 M4
Quick Summary
ENRB21202 M4 receptacle assembly from Eaton Crouse-Hinds Ark-Gard provides safe, reliable power in hazardous and classified locations. In demanding industrial environments, unreliable sealing, corrosion, and noncompliant installations threaten uptime and safety. It carries NEC/CEC hazardous ratings including Class I Division 1 and 2, Class II Division 1 and 2, Class III, plus NEMA ratings 7, 3R, 9, and 12, giving engineers confidence across global sites. The copper-free aluminum housing reduces weight without sacrificing durability, and the single-gang 6-20R dead-end design simplifies installation and maintenance. With operation rated for 50-400 Hz at 250 Vac, it supports mixed-power systems, while offering compatibility with Ark-Gard ENR Premier accessories to streamline procurement and spare parts planning.
Product Information
Extended Description
ENRB21202 M4 Eaton Crouse-Hinds: Eaton Crouse-Hinds series Ark-Gard ENR Premier receptacle assembly, 20A, Single, 50-400 Hz, Copper-free aluminum, 6-20R, Single-gang, Group B rating, Dead end, 3/4", 250 Vac
Product Name
Eaton Crouse-Hinds series Ark-Gard ENR Premier receptacle assembly
Catalog Number
ENRB21202 M4
Product Length/Depth
6.5 in
Product Height
6.75 in
Product Width
6.88 in
Product Weight
13.8 lb
UPC
662276695252
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class III Class II, Division 2
NEMA Rating
7 3 3R 9 12
Number of gangs
Single-gang
Amperage Rating
20A
Voltage rating
250 Vac
Style
Dead end
Trade size
3/4"
NEMA configuration
6-20R
Cover type
Single
Material
Copper-free aluminum
Frequency rating
50-400 Hz
Special features
Group B rating
Ark-Gard ENR Premier Explosionproof NEMA Locking Devices catalog page
Ark-Gard ENP, ENR, ENC Explosionproof NEMA Locking Devices UL certification - ENR and ENP
Ark-Gard ENP, ENR, ENC Explosionproof NEMA Locking Devices UL certification - ENR and ENP
IF 344 - Ark-Gard ENR Receptacles ENP Model M97 Plugs
IF 344 - Ark-Gard ENR Receptacles ENP Model M97 Plugs
IF 344 - Ark-Gard ENR Receptacles ENP Model M97 Plugs
Eaton Specification Sheet - ENRB21202 M4
Feature: Hazardous-location certification and NEMA ratings provide robust safety and regulatory compliance. Business Impact: Reduces the risk of noncompliance penalties and downtime due to failed equipment in Class I/II/III environments. Application: Ideal for chemical plants, oil and gas facilities, and refineries that demand proven protection. Feature: Copper-free aluminum housing delivers durable, corrosion-resistant construction with lower weight. Business Impact: Easier handling during maintenance, reduced shipping costs, and longer service life in aggressive atmospheres. Application: Offshore platforms and marine applications where weight and corrosion are critical. Feature: Electrical specifications establish clear, compatible power delivery (20A, 250 Vac, 50-400 Hz). Business Impact: Supports reliable operation across mixed power systems, minimizing rework and warranty concerns. Application: Industrial plants requiring unified performance across diverse equipment. Feature: 6-20R NEMA configuration in a single-gang, dead-end design. Business Impact: Streamlines wiring, reduces installation time, and simplifies panel layout. Application: Control panels, junction boxes, and field installations in hazardous areas. Feature: Group B rating and ENR Premier integration. Business Impact: Enhanced safety classification with compatibility to Ark-Gard accessories, improving procurement certainty and spare-part availability. Application: Global projects needing consistent conformance with Eaton’s Ark-Gard ecosystem.
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FAQs
The ENRB21202 M4 is designed for Class I Division 1 and 2, Class II Division 1 and 2, and Class III environments, with NEC/CEC compliance and NEMA ratings 7, 3R, 9, and 12. It features a single-gang, 6-20R receptacle with a 3/4" trade size, copper-free aluminum housing, and an operating range of 50-400 Hz at 250 VAC, making it ideal for chemical plants, refineries, and offshore facilities.
It carries NEC/CEC hazardous-location ratings and UL certification for Ark-Gard ENR Premier products, ensuring compliance with relevant hazardous-location standards and safe operation in demanding industrial applications. The NEMA ratings further support suitability for severe environments, while the Group B rating provides an additional safety classification layer.
Yes. The NEMA configuration is 6-20R, with a 3/4" trade size and copper-free aluminum housing, designed to integrate with Ark-Gard ENR Premier locking devices and installation sheets such as IF 344 for ENR ENP models. This ensures seamless replacement, compatibility, and simplified procurement within Eaton’s ecosystem.
The dead-end, single-gang design minimizes wiring complexity and reduces installation time, while the rugged copper-free aluminum housing provides corrosion resistance and durability in harsh environments. The 20A at 250 VAC rating supports consistent power delivery, and the 50-400 Hz range accommodates diverse power systems, lowering maintenance interruptions and part variance.
Investing in a certified, durable receptacle reduces maintenance frequency and extends service life in hazardous locations. Its compliant design and compatibility with Ark-Gard accessories simplify regulatory documentation and spares management, delivering lower total cost of ownership across global plants and improving project timelines.