Transfer switch question???

mbrower wrote:

Excellent response! Love this kind of feedback.

I currently have 2 transfer switches. One is a 50A with priority to shore power (as stated before) that will stay on shore power regardless whether the inverter or generator is on. It will only switch if shore power is off. Once shore power is returned, the switch will transfer power back to shore power. Alternate power should never backfeed to shore power as long as the transfer switch is working correctly.

The generator and inverter are on the alternate power feed and is being switched by a 30A transfer switch. Priority is given to generator after 40 second time delay.

I think you may believe the generator and shore power feed one input side of the transfer switch and this is not the case. Shore power feeds one input and inverter/generator feeds the other input though a separate 30A transfer switch. All inputs are separated from one another so no backfeeding is possible with properly operating transfer switches. Am I still missing something?

Mark

This is how I understood your setup (though the initial description wasn't as clear as it might have been). The setup is fine in concept, and should be safe and workable in practice provided everything is appropriately specified and wired properly.

I probably would not set things up quite this way (in particular, I don't think I would want shore power to have priority over the generator), but that's a question of personal preference rather than safety.