Eaton EBMBB WT70EHD34 Circuit Breaker - Explosionproof
Part Number: EBMBB WT70EHD34
Quick Summary
The Eaton Crouse-Hinds EBMB circuit breaker is designed to protect hazardous-location power systems in industrial facilities, delivering reliable overcurrent protection for demanding chemical, oil, and mining environments. Many engineers struggle with downtime and regulatory headaches when retrofitting high-capacity protection into compact, rugged spaces without compromising safety, wiring accessibility, or serviceability. This model meets NEC/CEC requirements and carries hazardous-location ratings for Class I Division 1 and 2, Class II, and Class III, plus a broad NEMA enclosure footprint for versatile installation. With a copper-free aluminum enclosure and a bolted/ground joint/gasketed cover, installation is straightforward and maintenance-friendly, while providing scalable protection across distributed power systems.
Product Information
Extended Description
EBMBB WT70EHD34 Eaton: Eaton Crouse-Hinds series EBMB circuit breaker, 15A through 100A, EHD frame type, Bolted/ground joint/gasketed cover construction, Copper-free aluminum, 100A frame size, Cutler-Hammer breaker, Three-pole, 70A trip, 480 Vac/250 Vdc
Product Name
Eaton Crouse-Hinds series EBMB circuit breaker
Catalog Number
EBMBB WT70EHD34
UPC
782274669243
Product Length/Depth
14.78 in
Product Height
26.9 in
Product Width
10.25 in
Product Weight
126 lb
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 II, Division 2 Class III
NEMA Rating
3 3R 4 7 9 12
Enclosure
With circuit breaker
Number of poles
Three-pole
Voltage rating
480 Vac/250 Vdc
Frame size
100A
Amperage Rating
15A through 100A
Manufacturer
Cutler-Hammer
Circuit breaker frame type
EHD
Enclosure cover construction
Bolted/ground joint/gasketed
Enclosure material
Copper-free aluminum
SP3D Design Package - EBMB Explosionproof Circuit Breakers
EBMB Series Explosionproof Circuit Breakers catalog page
EBMB Explosionproof Circuit Breakers Canadian certification
EBMB Explosionproof Circuit Breakers Canadian certification
IF 1149 - Wiring
IF 1149 - Wiring
IF 1149 - Wiring
Eaton Specification Sheet - EBMBB WT70EHD34
Feature: Explosionproof EBMB construction provides robust ignition protection in hazardous locations. Business Impact: This reduces ignition risk and simplifies compliance with NEC/CEC and hazardous-area standards, helping maintenance teams avoid costly rework during audits. Application: Ideal for chemical plants, oil refineries, and mining sites where flammable atmospheres are present. Its gasketed enclosure and copper-free aluminum body further support durability in tough environments. Feature: Three-pole EBMB breaker with an EHD frame, 100A frame size, and an adjustable ampere range from 15A through 100A with a 70A trip. Business Impact: Enables precise feeder protection and predictable coordination with upstream devices, minimizing nuisance trips and unplanned shutdowns. Application: Use in panelboards and switchgear feeding motors and loads in hazardous facilities. Feature: Enclosure construction uses copper-free aluminum with bolted/ground joint/gasketed cover. Business Impact: Provides corrosion resistance, seal integrity, and easier field maintenance. Application: Indoor or outdoor hazardous-location installations where moisture and dust are concerns. Feature: Voltage rating of 480 Vac / 250 Vdc supports mixed AC/DC circuits. Business Impact: Simplifies system design, reduces part variety, and streamlines procurement. Application: Industrial facilities running mixed-voltage applications with the same protective device. Feature: Certifications and ratings include NEC/CEC compliance, Class I Division 1/2, Class II/III, and NEMA 3/3R/4/7/9/12. Business Impact: Ensures regulatory clearance and installation versatility across global sites. Application: Used in oil & gas, chemical processing, mining, and heavy manufacturing.
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FAQs
When installing the EBMB WT70EHD34, verify the enclosure is rated for Hazardous/Classified Locations and ensure the bolted/ground joint/gasketed cover is properly sealed to maintain explosionproof integrity. Use compatible LOTO procedures, follow NEC/CEC requirements, and coordinate with upstream protection devices to achieve correct trip coordination in Class I, II, or III environments.
This breaker provides an adjustable ampere range from 15A through 100A, with a fixed 70A trip rating for overload protection. The three-pole design in the 100A frame supports coordinated protection for feeders and motors, helping to minimize nuisance trips while ensuring rapid isolation of faulted circuits in hazardous areas.
Yes. The EBMB WT70EHD34 is designed for hazardous locations and Class I Division 1 and 2, Class II, and Class III ratings, with NEC/CEC compliance and a broad NEMA footprint. It is well-suited for oil and gas, chemical processing, mining, and other heavy-industrial applications requiring explosionproof protection and robust enclosure standards.
The product meets NEC/CEC standards and is rated for Hazardous/Classified Locations (Class I, II, III) with NEMA 3/3R/4/7/9/12 enclosures. It carries appropriate certifications for hazardous environments, supporting regulatory clearance across global installations in oil, gas, chemical, and mining sectors.
Benefits include a copper-free aluminum enclosure with a gasketed cover that resists corrosion and moisture, reducing maintenance frequency. The robust explosionproof design lowers downtime during audits, while the 100A frame and 15–100A range simplify spare part management and procurement, delivering predictable lifecycle costs and improved total cost of ownership.