A Square D panel board is an electrical distribution panel manufactured by Square D, which is a flagship brand of Schneider Electric and one of the most widely used electrical panel brands in North America. A panel board, also called a load center, breaker panel, or service panel, is the central distribution point that receives power from the utility meter and divides it into individual branch circuits protected by circuit breakers throughout your home or building. Square D makes two main residential panel lines. The Square D Homeline series is the economical, widely available line sold at Home Depot, Lowes, and electrical supply houses, known for its distinctive red and black breakers and affordable price. The Square D QO series is the premium professional line, recognized by its visible trip indicator red flag and higher interrupting ratings, and is preferred by many electricians for its durability and reliability. Both lines include main breaker and main lug configurations in various sizes from 100 amp to 225 amp. A Square D panel board includes the metal enclosure, bus bars that carry current, neutral and ground bars, and spaces for snap-in breakers. Square D panels are known for strong safety features, ease of installation, and widespread availability of compatible breakers.
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