Description
208Y/120V Main Breaker Kit
208Y/120V Main Breaker Kits are designed for compatible panelboard assemblies requiring a main breaker configuration for 208Y/120V electrical distribution systems. This product family includes dedicated options for single-phase and three-phase applications.
Select the correct kit according to the required phase configuration and verify compatibility with the exact panelboard interior, enclosure, main breaker arrangement, and complete electrical assembly before ordering.
Product Highlights
- Main breaker kit for compatible 208Y/120V panelboard assemblies
- Available for single-phase and three-phase applications
- Two catalog-number options
- Phase-specific selection
- Designed for compatible panelboard main breaker configurations
- Supports field-configured electrical distribution assemblies
- Verify panelboard compatibility before ordering
Technical Specifications
| Product Type | Main Breaker Kit |
|---|---|
| System Voltage | 208Y/120V |
| Available Phase Configurations | Single Phase, Three Phase |
| Available Catalog Numbers | MB612, MB613 |
| Primary Application | Compatible Panelboard Main Breaker Assemblies |
| Selection Requirement | Match Catalog Number to Required Phase Configuration |
Construction & Configuration Details
These main breaker kits are intended for use as part of a compatible panelboard assembly rather than as complete standalone distribution equipment.
The correct kit is selected according to the electrical system phase configuration. MB612 is the single-phase option, while MB613 is the three-phase option.
Because main breaker kits are equipment-specific components, the exact panelboard interior and complete assembly should be verified before installation.
Available Main Breaker Kits
Catalog Number & Phase Configuration
| Catalog Number | Phase Configuration | System Voltage |
|---|---|---|
| MB612 | Single Phase | 208Y/120V System Application |
| MB613 | Three Phase | 208Y/120V |
Selecting the Correct Main Breaker Kit
Single-Phase Application
Select MB612 when the compatible panelboard assembly requires the single-phase main breaker kit configuration.
Three-Phase Application
Select MB613 when the compatible panelboard assembly requires a three-phase main breaker kit for a 208Y/120V distribution system.
Main Breaker Kit Function
Main Disconnect Configuration
The kit supports a compatible panelboard configuration where a main breaker serves as the primary overcurrent protective and disconnecting device.
Phase-Specific Design
Separate catalog numbers are provided for single-phase and three-phase panelboard configurations.
Panelboard Integration
The main breaker kit is intended to integrate with the correct compatible panelboard interior and associated components.
Panelboard Assembly Considerations
A main breaker kit is one component of a complete panelboard assembly. Additional compatible components may be required depending on the electrical design.
- Compatible panelboard interior
- Compatible enclosure
- Compatible panelboard front
- Main breaker components required by the kit
- Branch circuit breakers
- Neutral components
- Grounding components
- Additional accessories required by the panelboard configuration
Confirm the complete panelboard bill of material and component compatibility before ordering or installation.
Common Applications
Commercial Electrical Distribution
- Commercial buildings
- Office facilities
- Retail facilities
- Electrical rooms
- Building distribution systems
Industrial & Institutional
- Industrial facilities
- Institutional buildings
- Equipment rooms
- Panelboard replacement projects
- Electrical distribution upgrades
Installation & Selection Considerations
- Confirm whether the application requires single-phase or three-phase service.
- Select MB612 for the single-phase configuration.
- Select MB613 for the three-phase configuration.
- Verify compatibility with the exact panelboard interior.
- Confirm compatibility with the panelboard enclosure and front.
- Verify the required main breaker and electrical ratings separately.
- Confirm branch circuit breaker requirements.
- Verify neutral and grounding requirements.
- Maintain required electrical working clearances.
- De-energize electrical equipment before installation or service.
- Verify absence of voltage before working on the panelboard.
- Installation should be performed by qualified electrical personnel.
- Follow current manufacturer instructions and applicable electrical codes.
Need Help Selecting a Main Breaker Kit?
Our electrical and industrial product specialists can help review your panelboard interior, phase configuration, system voltage, main breaker requirements, enclosure, and complete panelboard assembly before you order.
Frequently Asked Questions
What is this product used for?
This product family provides main breaker kit options for compatible panelboard assemblies used in 208Y/120V electrical distribution applications.
What is the catalog number for the single-phase kit?
The single-phase main breaker kit is catalog number MB612.
What is the catalog number for the three-phase kit?
The three-phase 208Y/120V main breaker kit is catalog number MB613.
Are MB612 and MB613 interchangeable?
No. They represent different phase configurations. Select the catalog number that matches the intended panelboard and electrical system.
Does the kit include the complete panelboard?
No. The main breaker kit is one component of a compatible panelboard assembly. The interior, enclosure, front, branch breakers, grounding components, and other required items are selected separately.
Can I select the kit based only on voltage?
No. In addition to system voltage, verify the phase configuration, exact panelboard interior, main breaker requirements, and complete equipment compatibility.
Who should install the main breaker kit?
Installation and service should be performed by qualified electrical personnel with the equipment de-energized and in accordance with manufacturer instructions and applicable electrical requirements.
Important Ordering & Installation Notes
- Product: 208Y/120V Main Breaker Kit.
- MB612: Single Phase.
- MB613: Three Phase.
- System application: 208Y/120V panelboard distribution.
- Confirm phase configuration before ordering.
- Verify compatibility with the exact panelboard interior.
- Confirm enclosure, front, breaker, neutral, and grounding requirements separately.
- Verify all electrical ratings before installation.
- De-energize equipment before installation or service.
- Verify absence of voltage before working on electrical equipment.
- Installation should be performed by qualified electrical personnel.
- Follow current manufacturer instructions and applicable electrical codes.
