Square D NF442L4 Panelboard Interior 42 Space

Square D NF442L4 Panelboard Interior is a 400-amp, 42-space NF panelboard interior from Schneider Electric. This main-lug-only unit uses aluminum bus and is configured for 3-phase, 4-wire service, with a maximum rating of 600Y/347 VAC, making it suitable for distributing power to downstream branch breakers in commercial and light-industrial installations that use 347 V line-to-neutral loads. It provides 42 circuit positions to feed downstream circuits and is designed to be used within an NF panelboard assembly to form a complete feeder distribution point from a service disconnect. As part of Schneider Electric’s Square D NF family, the NF442L4 is built for robust, long-term reliability in electrical distribution systems and supports expansion within its 42-space footprint when paired with compatible enclosures and breakers. This interior is intended for applications requiring a 400 A, 42-slot panelboard in systems that operate at up to 600Y/347 VAC, delivering organized, scalable power distribution for equipment rooms, mechanical spaces, offices, or data centers that run on three-phase power with a four-wire configuration.