Your bathrooms do not have enough electricity to run both a hair dryer and curling iron, e.g., 10 + 10 = 20, you have 15. To solve that, you would have to add an additional circuit, or increase the capacity of the existing circuit.

The wattage usage of the appliances is often printed on the appliance.

Jim is correct, and I’d suggest each bath be on their own circuit if you can swing it. That said, I believe any outlet that is near water needs to be on a gfci. Dont daisy chain them, you’re good as long as the first outlet nearest water is on a gfci and it will protect the downstream outlets as well. And having a gfci outlet on your bath, instead of tripping a breaker downstairs will normally trip the gfci outlet and you can just reset it in the bath. Until then, its best to communicate with your daughter when you’re running both at the same time to keep from tripping the breaker.

Like I said...she is going off to college..however...if put GFCI on my bath...would it trip in the event the curling iron was on and the hair dryer or do they just protect from moisture...

It most likely will if the two combined are rated higher that the circuit,

GFI will not change anything about the shared circuit overload situation. The breakers will still trip. But if you drop the hair dryer in the sink, the GFI will now trip.

So what you're saying is I'm still going to be running down to the basement ... Even if the gfci trips?... Not to sound dumb but if I drop the hair dryer in the sink today without one what happens ..do I fry myself or am I just running down to the basement as usual...Maybe my wife is right and I'm tinkering where I need not be...

I think the best course for you is to have the electrician assess the situation and advise you on what is needed/possible.

No, GFIs will not solve the problem you describe.

They will make you safer, however.

To solve your breaker tripping problem, you will need to have your electrician install a completely new circuit for one of the receptacles. It will come with a GFI. :)

I am an idiot. In my half bath downstairs in back of a box of tissues is a GFCI which when tested trips off the power in my other two bathrooms outlets... So I probably don't need one. I guess the issue is of an overload on the circuit does not cause a GFCI to trip ...only moisture does...

A GFI -- a Ground Fault Interruptor -- is to protect you from all kinds of shock hazards The presence of water just increases the possibility of a dangerous shock. However, there are all kinds of shock hazards that a GFI will help protect against that don't involve moisture.

Thanks..I never knew that. Is it redundant then to add another gfci to my bathroom or does the one downstairs sort if cover all 3 baths? I will have the electrician review everything of course... Just curious....thanks all.

The GFCI downstairs is protecting all 3. So the only benefit of having GFCIs located in the individual bathrooms is in the event that it trips, you don't have to go down to the downstairs bathroom to reset it. (And as others have said, GFCIs don't trip on overloads, just ground faults).

But if you do decide to change the outlets in the other bathrooms to GFCIs, then have the electrician change the wiring at the GFCI in the downstairs bathroom so that it ISN'T protecting the upstairs ones. Otherwise, if a ground fault occurs you won't know which GFCI tripped faster and has to be reset. It could be either one.