Eaton / Cutler-Hammer EC3020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer EC3020 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial applications, the Eaton EC3020 is a 3-pole, 20A molded case circuit breaker from the legacy Westinghouse E-Frame lineage. This bolt-on breaker mounts into classic Cutler-Hammer Type EC panelboards. For modern upgrades, it is superseded by the EHD3020 model, ensuring continued support for existing infrastructure. Rated for 10kAIC at 240VAC, it features a fixed thermal-magnetic trip unit and carries an HACR rating for HVAC equipment.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | EC |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | EC |
|---|---|
| Terminal Type | Lugs |
| For Use With | Cutler-Hammer Type EC Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | NEMA AB 1, UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the EC3020 circuit breaker?
This breaker is designed specifically for installation in legacy Cutler-Hammer Type EC panelboards.
What wire sizes are supported by the lugs on the EC3020?
The terminals accept 14 AWG through 1/0 AWG conductors. You can safely use either copper or aluminum wiring for your installation.
Does this breaker plug in or bolt on to the busbar?
The EC3020 requires a bolt-on connection. It must be mechanically fastened to the panelboard bus, which provides a secure, vibration-resistant connection compared to plug-on alternatives.
What does the LI trip function code mean for this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (L) protection for gradual overloads and Instantaneous (I) protection for sudden short circuits. Both settings are fixed on this model.
What frame group does the EC3020 belong to?
It is classified under the legacy Westinghouse E Frames group, specifically utilizing the Cutler-Hammer EC frame design.
Can I use the EC3020 on a 480V system?
No, this breaker is strictly rated for a maximum of 240VAC. Installing it on a higher voltage system violates its safety ratings and can lead to equipment failure.
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