I'm trying to reach a decision to upgrade my home's old fuse box with breakers. My sparkie suggested going to double pole combined RCD/ breakers. In thinking about it afterwards, I was wondering if there was really any benefit in going that way versus single pole. By my reckoning, as long as the active is cut, the circuit should be safe? The only case where I could think a double pole breaker may benefit is if it was possible to come in contact with an active from another circuit (on a different breaker). But even if that did happen, wouldn't it create an imbalance between active and neutral on the live circuit and trigger the RCD there?
Yours in confusion.
Glenn