No, the whirlpool has a motor load connected to it and should be connected to a dedicated ground fault breaker.
You can provided the protecting breaker for the circuit is 20 Amps or less.
Assuming this is not an office of a place where lots of the outlets will be used to power items that draw lots of current on a 15 amp circuit wired with 14/2 wire I would limit it to no more than 10 outlets and lights combined. On a 20 amp circuit wired with 12/2 wire I would limit it to a 14 outlets and lights combined. There is no limit in the code. You just use common sense based on what is going to be used on this circuit.
It could be that the bathroom circuit simply has more on it so the hair dryer is pushing the circuit beyond its limit. In a typical bathroom, properly wired, this would not be the case. But if there are lights on the circuit other than in the bathroom (it would take a lot of lights for this to be a problem), or if there is a source of heat in the bathroom that is on, this may be where your problem is.
ten lights per curcuitCircuit loadingIn Canada there shall be not more that 12 outlets on any 2 wire branch circuit. Such outlets shall be considered to be rated at not more that 1 amp per outlet. Where the connected load is known, the number of outlets may exceed 12 providing the load current does not exceed 80 % of the rating of the over current device protecting the circuit.
Your bathroom plug and light are on the same circuit. When you plug in a hair dryer that uses more electricity then the bulb the bulb will dim. To fix this you need to call an electrician and have him put the lights on a separate circuit from the plugs.
A GFCI receptacle can pass it's "protection" to other outlets wired from it. If the GFCI trips, all outlets wired from it will "trip" also. A GFCI tripping will not necessarily trip the circuit breaker in the service panel.
I need to remodel a master bathroom, where can one get modern bathroom lights?
If there is nothing else on the circuit then you could easily install 15. If there are outlets on the same circuit then try and keep the total of outlets and lights to a maximum of 15. But in reality the number of devices depends on how many amps each device pulls. Add up the amperage of the recessed lights you are going to install and then add any outlets and what may be plugged into them to get the number you can install. A 100 watt light bulb will draw about 1 amp. So you can easily have 15 on a 20 amp circuit.
The electrical code states that there shall not be more than 12 outlets on a two wire branch circuit. Such outlets shall be considered to be rated at not less than 1 amp per outlet.Where the connected load is known, the number of outlets shall be permitted to exceed 12, provided that the load current does not exceed 80% of the rating of the over current device protecting the circuit.
If the lights are the load of the circuit, then the lights will be off if the circuit is open.
For residential occupancy there is no code for the number of outlets. It depends on the load that is going to be applied to these outlets. In an average bedroom I would limit the outlets to no more than 12 unless it is going to be used as an office. In that case limit it to 10. If the lights are on the same circuit then limit it to a combination of 12 counting the lights and outlets. For a residential occupancy, there is no Code limit or load per receptacle. The number of required branch circuits is determined by calculations stated in article 220 of the nation electrical code and are related to square footage. Certain branch circuits, such as kitchen, laundry, and bathroom cannot serve other areas. That said, it is good practice to limit the number of general purpose lighting and general purpose outlets per circuit. Your local inspector may choose to be more stringent than the actual Code requirements.
You probably blew the breaker for the lights. While usually the lights and outlets in a room are on the same breaker, it isn't always done that way. And you may have blown the light bulbs in the lights.