Square D™ QO™ and Homeline™ 300A/400A CSEDs
Simplify installations with the most compact Combination Service Entrance Device (CSED).
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Smarter installs start here.
Square D QO and Homeline 300A/400A CSEDs combine the meter socket and outdoor disconnect into a single, compact, lightweight enclosure, designed for plug-on neutral circuit breakers. Each enclosure features an integrated load center, offering flexible options to stay compliant with evolving code requirements (AFCI, GFCI, and surge protection).
Add a Schneider Energy Monitor to help homeowners track their energy usage and save money. Further enhance QO CSEDs with Square D control relays for circuit-level control. Built with future-ready flexibility, these CSEDs support alternate power sources such as solar, generators, and battery storage.
Powerful features. Minimal footprint.
The 300A/400A CSED combines a compact design and plug-on neutral technology for easy installation, with optional energy monitoring and circuit-control.


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Installation Tips for the Square D QO & Homeline 300A & 400A CSED
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