There is no magic formula. This is an optional gen so it could be as big or as little as they want. Your customer needs to decide what they want on the gen backup and then you can figure it out. If it will be an automatic transfer then the gen needs to be large enough to handle the full connected load or it must have load sheddingcajunsparks said:Ok then what is the proper way to figure out the load for a 3 phase generator for an office that wants a standby gen that will run constant until main power resumes.
You do realize that every motor, fuel type, altitude, etc.... comes into play don't you? Why not contact a generator manufacturer and let them help you?Simple question; when sizing 3 phase generator, do you calculate the load and divide the amp draw by three????