Each of the circuit breakers in the service panel controls electricity on a branch circuit. A branch circuit is typically a loop of wire that runs from the service panel, out to receptacles, light...
A multiwire branch circuit is consist`of two or more ungrouded conductors that has voltage between them and has a grounded conductor that is eoual voltage between each conductor connect to the...
No, they do not. Think of it this way. Your house is one huge parallel circuit. Not every branch is on all the time. You turn switches on and off to turn individual branches on and off at will.