Large circuit breaker distribution boxes include high-capacity load centers, panelboards, and enclosures from Eaton, Schneider Electric, Siemens, and Square D, designed for industrial, commercial, and high-demand residential applications.

Eaton Large Load Centers and Enclosures

• Type CH Loadcenters: NEMA 1, 3R, 12, or 13 enclosures; 200A bus rating; supports single- and double-pole breakers; available in surface or flush mount; includes Plug-on Neutral options for AFCI installation .
• BR and CHQ Enclosed Breakers: 240 Vac applications; single- and two-pole configurations; compatible with nearly 750 load centers; compact 1" design for efficient installation .
• Outdoor Raintight Boxes: Galvanized steel construction; suitable for 100A–300A+ applications; NEMA 3R rating for weather resistance .

Schneider Electric / Square D Panelboards

• NQ Panelboards: 100–600A bus capacities; 10–200A circuits; optional IP2X fingersafe construction; suitable for AC final distribution circuits .
• NF Panelboards: 125–800A bus capacities; field-installable breakers; 200% neutral options; supports lighting and appliance circuits up to 480Y/277 Vac .
• I-Line and I-Line Combo Panelboards: Modular design for large commercial or industrial applications; supports high circuit counts and flexible breaker configurations .
• QMB Panelboards: UL-listed low voltage distribution boards for commercial and industrial use; designed for high reliability and safety .

Other Notable Large Enclosures

• Hoffman A606CHNF: NEMA 4, 12, 13; 16 or 14 gauge steel; 6x6x4 inches; continuous welded seams; stainless steel clamps and hinge; oil-resistant gasket .
• E2PBX Hoffman NEMA 12/13: Configured with start/stop push buttons; 1-row vertical design; 14-gauge steel; suitable for industrial control applications .
• RFH-T Thomas & Betts NEMA 3R: Outdoor surface mount; 100A max; supports 2–3 pole breakers; dimensions 8x9x17.5 inches .

Key Features to Consider

• Amp Ratings: Large models typically range from 100A to 800A bus capacities.
• Pole Options: Single, double, or multi-pole configurations depending on load requirements.
• NEMA Ratings: NEMA 1 (indoor), NEMA 3R (outdoor), NEMA 12/13 (industrial environments).
• Breaker Compatibility: Ensure compatibility with Type CH, BR, CL, or other manufacturer-specific breakers.
• Mounting Options: Surface mount, flush mount, or modular configurations for flexible installation. These large distribution boxes are suitable for industrial, commercial, and high-demand residential applications, providing robust protection, high circuit capacity, and compliance with UL and NEMA standards .