Hi, thanks for any help! I just realized that there wasn't a bond screw in my main panel. I know it is supposed to be installed only in the 1st/ main panel. What could happen if it isn't in? Second question maybe more complicated? Subpanel with three wires hot/hot/ neutral no bond screw but accidently connected neutral to ground and powered on. Two smoke alarms popped and I turned breaker off. I fixed the neutral wire and tried again and the two alarms that popped then smoked while watching them. Cut power and removed the alarms that popped and smoked. What happened electrically? I know I was stupid but want to understand what happened. All other breakers and neutral now connected in that box without any problems. Just alarm breaker is off. I guess it powered the neutral somehow and blew them? Be nice please