Eaton / Cutler-Hammer NGC312033EC Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Bolt-On
Quantity
Eaton / Cutler-Hammer NGC312033EC - 1200A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for continuous heavy loads, the Eaton NGC312033EC is a 1200A, 3-pole molded case circuit breaker for industrial facilities. This NG-frame device mounts into Eaton Series G panelboards, switchboards, and Pow-R-Line C systems. It is the designated replacement for the legacy ND312033C, ensuring compatibility with existing infrastructure. Equipped with a solid-state electronic trip unit, it features adjustable LS functions. The breaker is 100% rated with 100kAIC at 480VAC.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Series | NGC |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Amperage Range | 500-1200A |
|---|
| Terminal Type | Stud/Tapped Pad |
|---|---|
| For Use With | Eaton Series G Panelboards, Switchboards, Motor Control Centers, Pow-R-Line C Panelboards |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits |
|---|---|
| Accessories | Imperial Tapped Terminals |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, HACR, IEC, UL |
| Temp Rating | -20C to 70C |
| Construction Features | HACR Rated, Reverse Feed, 100% Rated, True RMS Sensing |
Product FAQs
9 answersIs the Eaton NGC312033EC rated for 100% continuous operation?
Yes, the C suffix in the catalog number indicates this breaker is 100% rated. This allows it to carry its full 1200A continuous current rating without the standard 80% derating requirement, provided it is installed in a properly sized and ventilated enclosure.
Does the NGC312033EC come with wire lugs installed?
No, this breaker features imperial tapped line and load terminals for bolt-on connections, as indicated by the E in the catalog number. Cable lugs or multi-wire connectors must be purchased separately based on your specific wire size and conductor material.
What adjustability does the Digitrip 310+ LS trip unit provide?
The 33 trip unit code signifies a Digitrip 310+ electronic trip unit with Long-Time (L) and Short-Time (S) functions. This allows precise shaping of the time-current curve for continuous current overload protection and short-circuit coordination with downstream devices.
Can the NGC312033EC be reverse fed?
Yes, Eaton Series G NG-frame molded case circuit breakers are suitable for reverse feed applications. This allows power to be supplied to either the line or load terminals without compromising the protection functions.
How can I test the electronic trip unit on the NGC312033EC?
The Digitrip 310+ trip unit features a built-in test port. Electricians can use an Eaton functional test kit to verify the Long-Time and Short-Time protection circuits, and the unit includes a test LED for a no-trip functional indication.
Which panelboards and switchboards are compatible with the NGC312033EC?
This NG-frame breaker is designed for use in Eaton Series G panelboards, Pow-R-Line C panelboards, motor control centers, and compatible switchboards that accommodate 1200A bolt-on NG-frame dimensions.
Does the trip unit on this breaker provide an overload warning?
Yes, the Digitrip 310+ trip unit includes a dual-function LED that acts as a high load alarm during normal operation. It illuminates to warn personnel when the continuous current approaches an overload condition, allowing time to shed loads before a trip occurs.
Can I use the NGC312033EC to replace an older Cutler-Hammer ND-frame breaker?
While the NG-frame is the modern Series G equivalent to the legacy Series C ND-frame, they do not have identical physical dimensions or mounting footprints. Retrofitting an NG-frame breaker into an ND-frame space typically requires specific adapter hardware or busbar modifications.
Is the NGC312033EC HACR rated?
Yes, all Eaton Series G NG-frame circuit breakers are HACR rated, making them suitable for use with commercial heating, air conditioning, and refrigeration equipment.
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