I need to have a generator run 240 volts to a well pump, and want it switched off when the generator is started. I also want a second (back up) generator that can be switched on if/when the main generator doesn't work. What's the best kind of switch? And how should it be wired?
Electrical – What’s the best way to connect two separate generators to a well pump
electricalgeneratortransfer-switch
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Best Answer
Many generators (especially those for permanent installation) have optional automatic transfer switch assemblies. If the backup generator is permanently installed, then I'd recommend buying its recommended transfer switch. Wire it per its instructions.
If you're going to build your own transfer switch, then make sure that it is "break before make" or has some sort of interlock to prevent both generators from connecting to the load at the same time. Mains should also be isolated from either generator if mains is present on site.