The Square D by Schneider Electric brand Double Throw Safety Switch is designed to be tough, reliable and provide exceptional performance in the most grueling conditions. Double throw safety switches are designed for Residential, light commercial, and industrial installations. Double throw safety switches transfer a load from one power source to another power source. 30A-100A F Series safety switches provide significantly higher levels of mechanical endurance than NEMA KS-1 or UL98 standards require and switches can be field-converted to transfer a power source from one load to another. These switches come in fusible or non-fusible configurations and my be padlocked in the ON-OFF positions. This Double Throw Safety Switch has a rated current of 400A. This non-fusible disconnect, is surface mounted, and has a NEMA 3R, protection rating. This Double Throw Safety Switch comply's to UL listed certifications. Dimensions for this product are 30.02 in (H),39 in (W),10.63 in (D). This procuct comes with an 18 month warranty.