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QO™ Load Centers

Square D™ QO Load Centers

Industry leading offer since 1955 with features engineered for faster installation, reliability and quality. Contractors installing QO know it’s the World’s Finest!

Schneider Eletric Square D Picture
QO™ Load Centers
  • Features

    The QO load center and circuit breaker family is designed to satisfy individual requirements with a comprehensive selection:

    • Single and three phase
    • 3/4" circuit breaker width
    • 30 to 400 amps 2 to 42 circuits
    • Indoor and outdoor versions
    • Separate flush or surface mount covers
    • Full complement of accessories


    • Backed Out Neutral Screws save labor and installation time.
    • Exclusive shielded copper bus features electro tin-plated copper bus bars sandwiched between two rugged polymer shields to insulate and secure the interior.
    • Straight-in mains wiring and uniform termination lugs help minimize service cable bends, cutting waste and saving installation time.
    • Convertible mains allow fast field conversion between main breaker and main lugs to meet changing job requirements.
    • Standard 22,000/10,000 ampere series short circuit current rating on main breaker load centers provides increased application capability.
    • QO three-phase main circuit breaker panels can be field upgraded to provide 100,000A short circuit current ratings.
    • Single, captive interior mounting screw can't be lost. Interior mounts quickly and can easily be removed during rough-in for paint or theft protection.
    • Split branch neutral with up to 50% more terminations than UL requirement -- simplifies wiring and reduces clutter.
    • Indoor enclosures designed to rotate 180 degrees to accommodate top or bottom service entrance feed, saving expensive service cable.
    • Combination slot/square-drive neutral, ground, and cover screw accommodate both standard flat blade screwdrivers and square-head drivers. Three ground bar mounting locations (left, right, and end) make it easier to wire.


    • Residential
    • Remodels/Upgrades
    • Commercial
    • Industrial
    • Agricultural

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