Re: smoke detectors/arc fault
This is prohibited by some local codes. These codes require that the smokes be connected to a general use lighting circuit so that if the circuit is off the occupant will get it restored. Yes, I know that many smokes have back up battery power, but the most common reaction the intermittent beep of the low battery alarm is to remove the battery.
The smokes should be on a dedicated circuit ...
"It is the first responsibility of every citizen to question authority." B Franklin