The Square D QO 3-Phase 225 Amp Main Breaker 42-Space 42-Circuit Convertible Indoor Load Center is UL listed for residential， commercial and industrial power distribution. This load center is built with a shielded， copper bus bar that is plated for reliability. QO load centers are tested and listed only for QO circuit breakers. QO load centers are the World's Finest designed with industry leading features for flexible application. QO load centers include features engineered for fast installation and wire savings.

Cover sold separately

Accommodates plug-on secondary surge arrestor (sold separately)

Overhead/underground feed simply by rotating the device before installing

3 phase

Rated 208Y/120 VAC and 25，000 AIR short circuit current rating

Designed with straight-in mains to save expensive cable and time

Split branch neutral with terminal screws backed out offering with up to 50% more terminals than UL requires increases wiring flexibility saving installation time and simplifies wiring

Thermoplastic interior is among the most rugged in the industry

Slot/square drive screws let you use either standard flat blade screwdriver or square-head driver for positive drive and proper torque

Convertible mains allow you to meet changing job site requirements by field converting main breaker load centers to main lugs and vice versa

For protection from damage or theft on the job site， interiors can be easily removed with a single captive screw

3 ground bar mounting locations (left， right and end) let you pick the easiest spot to wire

Made in the USA