Abb tl42420r Main Lug Load Center 200A 42-circuit

Product Description

The ABB tl42420r is a 3-phase main lug load center rated for 200 amps at 208Y/120 volts AC, designed for commercial and high-rise residential electrical distribution systems. It provides 42 circuit spaces with a 22 kA interrupt rating, offering a solid margin of fault protection for demanding installations. The enclosure is NEMA 3R rated, making it suitable for outdoor or semi-protected locations exposed to rain. Licensed electricians install this unit as the primary distribution point for branch circuits in multitenant or commercial builds. The galvanized steel box and tin-plated copper stabs support long-term reliability in high-use environments.

This load center is intended for commercial or high-rise residential applications where a 3-phase, 4-wire distribution system is required. It accepts THQL breakers in a plug-in mounting configuration, streamlining breaker installation during initial setup or future service calls. With 42 available spaces, it handles large panel schedules typical of multi-unit residential buildings, retail spaces, or light commercial facilities. The main lug configuration means the upstream feed is terminated at the lugs rather than through a factory-installed main breaker, which is common when the load center is fed from a separately metered service or a larger upstream distribution panel.

Key Features

• 200A main lug rating with 22 kA interrupt capacity for commercial-grade fault protection
• 42 circuit spaces accept THQL plug-in breakers for fast, tool-efficient installation
• 3-phase, 4-wire wiring configuration supports 208Y/120V commercial distribution
• NEMA 3R enclosure rated for outdoor and rain-exposed locations
• Galvanized box with tin-plated copper stabs for corrosion resistance and connection durability
• Wire range of 1 AWG to 250 kcmil on branch and 2/0 AWG to 250 kcmil on feed conductors

Compatibility

Designed as a main lug 3-phase load center compatible with THQL-style plug-in circuit breakers in a 42-space configuration. Suitable for 208Y/120V, 4-wire commercial or high-rise residential distribution systems.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the upstream service before making any connections to the load center lugs. Verify conductor sizing matches the wire range specified for both feed and branch terminations before torquing connections. The NEMA 3R enclosure requires proper conduit sealing and knockout preparation to maintain its environmental rating.