I am rewiring a old house,that has knob and tube wiring. I ran 14/2 from the new 200amp circuit box. Going to the bedrooms upstairs for the lights. We are planning to put ceiling fans with lights in the bedrooms. How do you figure the wattage usage for that combination (not bought yet). Also is 14/2 heavy enough? One light/fan per room and one closet light x four bedrooms. Can I use one breaker for the whole upstairs? What size? 20amp? Would you want to bring up a separate 12/2 wire for the outlets on a 20 amp breaker?
Thanks in advance,
Dan

Since you already ran the 14/2 you will have to use a 15 amp breaker. That should be enough for the lighting and fans.

I'd use a separate circuit or two for the receptacles depending on how many there will be and the expected load.