Generac GNC-RTSN100J3 Guardian 100-Amp Fully Automatic Transfer Switch 120/240VFeatures 3 Phase Automatic Transfer switch Only works with 120 240V 3 Phase generators Fully Automatic Operation Standard Installation May require a sub panel or disconnect for serviceability Nema 3R Aluminum Enclosure For Use With Generac Generators Only What's in The Box 100 Amp Automatic Transfer Switch (120 240V 3 Phase) Owner's Manual Warranty 2 Year Factory Warranty 30 Day Satisfaction Guarantee Specifications Model RTSN100G3 Brand Generac