Profile: Elkhart Supply Corp. is a supplier and manufacturer of plumbing, electrical & manufactured products. Our product line includes cords, transfer switches, risers, break-away switches and manifolds. The ES3030G automatic transfer switch is intended for usage as an electrical transfer switch to automatically switch from the main power source to generator power. The ES50M-65N automatic transfer switch is intended for use as an electrical transfer switch to automatically switch multiple sources. It is primarily designed for installation in conjunction with a generator having a rated output less than 12KW.