Originally Posted by DQDick
Yes, that's correct. Something has to be on on that circuit to generate a red light. Which is a good reason to make sure yours are labeled so you are sure what is powering what.
I marked every light/receptacle/appliance etc. with its corresponding circuit/breaker/fuse #
Now if there is an issue with anything, I can go directly to the right breaker/fuse to turn it off without having to figure out what goes to what.