Siemens P1X42MC400CT Panelboard

Siemens P1X42MC400CT Panelboard is a 400-amp, 42-circuit interior panelboard from the Siemens P1 family, designed for 208Y/120V three-phase, four-wire power. This unassembled panelboard (UPB) is intended to accept Siemens main or subfeed devices, allowing flexible distribution configurations in commercial and light-industrial installations. The interior employs copper bus construction to deliver reliable, low-impedance current paths across 42 circuits, making it suitable for multi-branch load centers. For footprint and compatibility, the P1X42MC400CT is offered with enclosure options including B68, S68B, and WP68, consistent with Siemens’ UPB selection guides. With a 400-amp rating and 42 circuits, it provides a substantial distribution point for feeders and branch circuits in spaces where space and efficiency matter. The panelboard is part of the P1 platform, known for modularity and field-assembly flexibility, enabling technicians to tailor breaker configurations to the installed load while maintaining Siemens’ copper-bus reliability. Typical applications include service distribution in commercial buildings, office complexes, or small to mid-sized industrial facilities that require a robust 400A main and 42 circuit capacity in a compact 208Y/120V, 3-phase, 4-wire system.