do you have turn turn power off from the circuit breaker to change battery on a wired smoke alarm? If so why? is it to avoid electrocution when changing the back up battery? I know if you are changing the wired alarm which is connected to the house electric you have to turn power off from the circuit breaker but just to change the back up battery??
How do you know which is the breaker which is for the smoke alarms?
How do you know which is the breaker which is for the smoke alarms?