ASCO offers quality manual and automatic transfer switches for loads up to 4000A, plus their new 3QC Quick Connect Power Panels. Customer service, rock-solid dependability, and the industry's highest performance have made ASCO the first choice in emergency power for more than 80 years. ASCO transfer switches are used in more emergency power backup systems worldwide than any other. ASCO is the name behind most of the technological advances in transfer switch design, and they have more patents than all other manufacturers combined. ASCO transfer switches are the first choice for installations of every kind, from homes and small businesses to the largest financial data centers and hospitals in the world.