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The Square D N400M is a 400 Amp main circuit breaker adapter kit designed for NF panelboards. It is compatible with LI, LC, LAL, and LHL circuit breakers. The kit is UL listed and CSA certified for reliable use in electrical systems.
This adapter kit allows for easy installation of main circuit breakers in NF panelboards, addressing the needs of electrical contractors.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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