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Used for overload and short-circuit protection of your electrical system this breaker is compatible with QO and Homeline load centers CSED devices and NQOD panel boards rated for 200 – 225 amps. It accepts aluminum or copper #4 – 300 AWG feeder wire. To ensure safety it is both UL listed and ANSI certified. QO circuit breakers have features no other manufacturer can offer. They come in many different sizes and can meet the needs of virtually every function in your home or business. These types of quality industry exclusive products keep the Square D brand ahead of the competition and are builders’ and electrical contractors’ first choice in electrical protection.