Judging by your question I'm going to take a guess and say you should probably not attempt to do this yourself. Nor do I recommend it.
That being said.
You can either have your service upgraded to 200amp, and install a 100amp double pole breaker and branch it off into a 100 amp sub panel. You could most likely re-use your old panel for the 100 amp sub panel.
Or...
You could have your new 200 amp panel installed in a different location and your current panel wired into it for 100 amps.
Yes this is possible. You are still limited to 200 A overall. You would need a permit and a load calculation to ensure you are not creating a situation where you would be creating excessive load.
You can as long as you don't assume that this gives you another 200 Amps to use. Your overall amperage will still be only 200 Amps. You can supply the sub-panel with a smaller breaker than 200 Amps.
Yes. The interconnecting conductors have to have the same rating as the main distribution conductors. If the sub panel is detached from the main home, the sub panel has to be treated as a new service. This means that the service has to have its own ground rods or plates and the neutral has to be bonded to the enclosure of the sub panel.
Yes, if you have the correct size #2 wire going to it.
No
A 200 amp service panel with a 60 amp sub-panel.
A 100-A sub-panel would be fed from a 100-A breaker.
Possibly if the kitchen does not have an electric over and electric cook-top and no eclectic water heater in the bathroom. If they are electric have an electrician evaluate what is being powered in the kitchen and the bathroom to determine if a 50 amp sub-panel is large enough. I would for sure at least go with a 60 amp sub-panel.
You can. Using these size breakers in a 60 amp sub panel might be pushing the limit for breaking the sub panels feeder breaker. The breaker feeding the sub panel will have to be no bigger than 60 amps because of the main bus bar capacity of the sub panel. It would be better to install a 100 amp sub panel and then there would be a bit of a buffer and you will have the ability to add additional small load circuits.
How do i install aluminum bonding strap in sub panel of 100 amp service
Yes
There are two things to think about here. First of all a 200 amp breaker will not physically fit into a 100 amp panel. This is so designed because the panel buss is not designed to conduct 200 amps before the current is cut off. A 100 amp rating on the panel is the maximum amount of current that the manufacturer states, that can be handled safely. Second if the 200 amp breaker is in the main panel then everything downstream from that breaker has to be rated for 200 amp conductivity. The wire size will have to be 3/0 from the breaker to the first over current device in the sub panel which will be the sub panel's main breaker. The sub panel can not be a load center but will have to be a combination panel. I doubt that the 100 amp sub panel's main breaker lugs would be large enough to connect the 3/0 cable.
A #1 copper wire with an insulation rating of 90 degrees C is rated at 140 amps.
you propaly can't sub panel from 100 amp panel. Just not enough amperage to be worth while. i had to up grade t a 200 amp main first and then I was able to take a 60 sub panel from that.
A 200 amp service panel with a 60 amp sub-panel.
A 100-A sub-panel would be fed from a 100-A breaker.
Yes they can. As long as the total load of all subs does not exceed the rated capacity of the main breakers, you should be fine, including 80 percent de-rating of any constant loads.
It depends on where the sub panel is situated. If the panel is under the same roof as the main distribution panel then no ground rods are needed on the sub panel. If the sub panel is in a different building then a ground rod might be needed. There has been an electrical code rule change on this subject. Check with your local electrical inspector before installation so that it is done correctly.
SeeIf_a_100A_breaker_panel_has_five_15A_breakers_and_four_20A_breakers_could_this_overload_the_panel
Possibly if the kitchen does not have an electric over and electric cook-top and no eclectic water heater in the bathroom. If they are electric have an electrician evaluate what is being powered in the kitchen and the bathroom to determine if a 50 amp sub-panel is large enough. I would for sure at least go with a 60 amp sub-panel.
#2 aluminum for 100 amp
The sub-panel need to be fed from the main panel, by way of a circuit breaker connected to one of the breaker locations. Or if your sub-panel has a main breaker installed you can feed from the main panel with a sub-feed lug kit. This looks like a breaker, but is only a point where you can branch off the sub panel.