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Square D NF Panelboard Interior, 250A Main Lugs, Cu Bus, 66-Pole, 3-Phase 4-Wire
The Square D NF Panelboard Interior is a ready-to-install interior assembly rated 250A with main lugs (MLO) and a copper (Cu) bus, delivering 66 pole spaces for 3-phase, 4-wire, 600Y/347 V AC electrical systems. This versatile NF interior is field convertible to top or bottom feed and accepts bolt-on EDB, EGB, and EJB miniature circuit breakers, making it well suited for commercial buildings, industrial facilities, data centers, stadiums, and offices. Manufactured to UL 67 and CSA C22.2 standards, it provides the dependable, code-compliant power distribution professional electricians rely on.
Key Features
- Main Lugs Rating: 250A main lugs (MLO) configuration for reliable feeder or service entrance distribution.
- Copper Bus: Cu bus bar construction for high conductivity and long-term reliability.
- 66 Pole Spaces: Generous 66-pole capacity supports large branch circuit counts within a single panelboard.
- 3-Phase, 4-Wire: Configured for 3-phase, 4-wire, 600Y/347 V AC electrical distribution systems.
- Field Convertible: Ready-to-install interior assembly is field convertible to top or bottom feed.
- Bolt-On Breaker Compatible: Accepts bolt-on EDB, EGB, and EJB miniature circuit breakers.
- Terminal Connections: Line and neutral lugs sized for AWG 6...350 kcmil aluminum conductors.
Certifications & Compliance
- UL 67 Listed
- CSA C22.2 Certified
- ROHS EUR Compliant
Technical Specifications
- Warranty: 18 months
- Number Of Spaces: 66
- Toxic Heavy Metal Free: Yes
- Mercury Free: Yes
- ROHS Eur In Scope: Yes
Typical Applications
- Commercial Building Electrical Distribution
- Industrial Facility Power Systems
- Data Center Panelboard Installations
- Stadium and Large Venue Electrical Systems
- Office Building Load Centers
Why Square D?
Square D NF Panelboard Interiors combine copper bus construction, bolt-on breaker compatibility, and UL 67 / CSA C22.2 certification to deliver dependable, code-compliant power distribution for demanding commercial and industrial installations. With a field-convertible, ready-to-install design and an 18-month warranty, this NF interior is built for long-term performance where reliability matters most.
Manufacturer Resources
Product Specs
- Product Type:
- Panelboard Interior
- Voltage Rating:
- 600Y/347V AC
- Amperage Rating:
- 250A
- Configuration:
- Main Lugs
- Standards:
- UL 67, CSA C22.2
- Product Material:
- Copper
- Department:
- Electrical
- Product Group:
- Power Distribution
- Product Subgroup:
- Panelboards & Load Centers