Eaton EFD21104 Circuit Breaker - Hazardous Locations

Part Number: EFD21104
Manufacturer
Eaton
Part number
EFD21104

Quick Summary

Eaton EFD21104 circuit breaker protects hazardous locations by interrupting fault currents in electrical distribution panels. Installers often struggle to achieve reliable explosionproof protection while maintaining quick maintenance in harsh environments. It carries NEC/CEC compliance with Class I Division 1 and Class II Division 1 ratings and supports NEMA 3, 7, 9, 12 enclosures for durable, compliant protection. Designed for single-gang, 3/4 inch trade-size installations, it enables cost-effective protection in demanding industrial settings, while leveraging existing Square D compatibility.

Product Information

Extended Description

EFD21104 Eaton: Eaton Crouse-Hinds series EFD circuit breaker, 15A, Bolted/ground joint cover construction, Feraloy iron alloy, Square D breaker, Single-gang, Single-pole, Dead end, 3/4", 120/240 Vac
Product Name
Eaton Crouse-Hinds series EFD circuit breaker
Catalog Number
EFD21104
UPC
782274033167
Product Length/Depth
3.5 in
Product Height
6.13 in
Product Width
3 in
Product Weight
7.54 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 2 Class III Class II, Division 1
NEMA Rating
3 7 9 12
Enclosure
With circuit breaker
Number of gangs
Single-gang
Style
Dead end
Amperage Rating
15 A
Trade size
3/4"
Manufacturer
Square D
Number of poles
Single-pole
Voltage rating
120/240 Vac
Enclosure cover construction
Bolted/ground joint
Enclosure material
Feraloy iron alloy
Explosionproof feraloy iron alloy housing provides rugged protection in hazardous environments, reducing risk of arc ignition and facilitating long service life in chemical plants and oil & gas facilities. Business impact: improved safety margins and less frequent replacements; Application: install in harsh zones where classification and protection matter. Bolted/ground joint enclosure design simplifies field assembly and maintenance, lowering startup time and enabling reliable sealing in tight spaces. Business impact: faster commissioning and reduced labor costs; Application: single-gang panels with 3/4" trade size support. Amperage rating of 15 A and voltage of 120/240 Vac deliver precise overcurrent protection for branch circuits, minimizing nuisance trips and safeguarding downstream equipment. Business impact: enhanced process uptime; Application: motor control and lighting feeder circuits in Hazardous/Classified Locations. NEC/CEC compliance and NEMA ratings (3, 7, 9, 12) reinforce regulatory alignment, simplifying procurement and audit trails. Business impact: streamlined compliance and fewer certification risks; Application: infrastructure in chemical plants, refineries, mining sites. The product’s compatibility with Square D ecosystems and a single-pole, dead-end, single-gang form factor supports straightforward installation and retrofit projects, reducing cabinet modifications and inventory variety. Business impact: lower total cost of ownership; Application: retrofits and new builds in harsh environments.

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FAQs

For hazardous locations, install the EFD21104 in a single-gang enclosure with a bolted/ground joint cover. It uses a 3/4 inch trade size and is rated for 120/240 Vac, with a 15 A amperage rating. Ensure proper wiring practices and clearances per NEC/CEC requirements, and confirm compatibility with the Square D ecosystem in your panel design.
Yes. The EFD21104 is designed within the Eaton Crouse-Hinds EFD family, featuring a single-pole, single-gang form factor that aligns with standard Square D components. It can be integrated into existing electrical panels and hazardous-location assemblies that support bolted/ground joint enclosure construction, helping minimize retrofit complexity.
The device is rated for Hazardous/Classified Locations under NEC/CEC guidelines. It supports NEC Class I Division 1 and Division 2, Class II Division 2, Class III, and Class II Division 1 environments, with area classifications suitable for hazardous or classified locations. This ensures compliance in oil & gas, chemical processing, and similar industries.
Key specs include 15 A amperage rating, 3/4" trade size, 120/240 Vac voltage, single-pole configuration, and a dead-end enclosure style. It comes with a bolted/ground joint enclosure and uses a feraloy iron alloy housing, optimized for hazardous-location protection and durable service.
Downloads include the EFD and EFDC Series Explosionproof Circuit Breakers catalog page and the Eaton specification sheet for EFD21104. These documents provide formal technical details, wiring diagrams, and installation guidelines to support compliance and procurement decisions.