Can a 220V relay be used to switch 110V power? If yes, then additionally to this question, does the amperage (A) rating on the relay change when the voltage (V) is 110V instead of 220V?
To the risk of answering my own question, I think any voltage lower or equal to 220V could be switched with a 220V rated relay. Hope to be right on this, but I'm not sure about the amperage rating. My guess is that instead of 220V/5A that relay could also be suited for 110V/10A but I'm not sure.