Square D QO Series Convertible Main Breaker Load Center, NEMA 1
The Square D QO Series Load Center is a 1 phase, 42-space, 52-circuit panel built with a 200A convertible main breaker (PoN configuration) for residential and light industrial electrical distribution. Rated 120/240 V AC, this load center accepts QO breakers, ground fault interrupters, arc fault interrupters, and surge arresters, and is housed in a NEMA 1 indoor enclosure of welded sheet steel with a baked enamel Gray finish. Copper busbars and straight-in wiring terminals support clutter-free, code-compliant installations.
Key Features
- Configuration: 42 spaces, 52 circuits with a 200A convertible main breaker (PoN) for flexible service entrance or main lug applications.
- Durable Construction: Welded sheet steel enclosure with baked enamel Gray finish for long-term durability.
- Copper Busbar: Copper busbar construction supports AWG 4...300 kcmil aluminum/copper conductors.
- Operational Voltage: Rated 120/240 V AC for standard residential and light commercial service.
- Enclosure Rating: NEMA 1 indoor enclosure suitable for protected interior installations.
- Straight-In Wiring: Straight-in wiring design saves wire, labor, and time during installation.
- 50% More Terminations: Additional terminations provide clutter-free wiring versus standard load centers.
- Operating Range: Rated for ambient air temperatures from -5°C to 40°C.
Certifications & Compliance
- UL Listed
- Mercury Free
- NEMA 1 Indoor Enclosure
Technical Specifications
- Number Of Spaces: 42
- Sustainable Packaging: No
- Mercury Free: Yes
- Packaging Without Single Use Plastic: No
- Tier Id: 2
- ROHS Eur In Scope: Yes
- Recycled Metal Content At Cr Level: 0 %
- Number Of Tandem Circuit Breakers: 10
- With Recycled Cardboard: No
- WEEE Product Category: 5
- Range Of Product: QO
- China ROHS In Scope: No
- Return Indicator: Y
- Take Back: No
- Device Composition: grounding bar (ordered separately)
Typical Applications
- Residential Electrical Service Panels
- Light Industrial Power Distribution
- New Construction Electrical Rough-In
- Panelboard and Load Center Upgrades
- Indoor Protected Installations
Why Square D?
Square D QO load centers combine a welded steel enclosure, copper busbar, and UL Listed construction to deliver reliable, code-compliant power distribution. The convertible main breaker design and straight-in wiring terminals give contractors flexible, time-saving installation for both new construction and panel upgrades.
Manufacturer Resources
Product Specs
- Product Type:
- Load Center
- Voltage Rating:
- 120/240V
- Amperage Rating:
- 200A
- Listing:
- UL Listed
- Series:
- QO
- Product Finish:
- Baked Enamel Gray
- Configuration:
- NEMA 1 Enclosure
- Product Material:
- Welded Sheet Steel
- Department:
- Electrical
- Product Group:
- Power Distribution
- Product Subgroup:
- Panelboards & Load Centers