Solutions to Industrial and Commercial Needs Using Multiple Utility Services and Emergency Generator Sets

Industrial and commercial installations generally require more than one power source to ensure continuity of electrical power to essential loads. Two principal methods are 1) two utility services and 2) one utility service and on-site generation. Load requirements, reliability, installation feasibility, and economy are some of the governing factors in the selection of which combination of power sources should be used. Furthermore, transfer switches, overcurrent protective devices, and associated controls must be coordinated in the system.