I want to install a 100 amp subpanel being fed from a 200 amp service panel,I intend to use #2 copper wire to feed this subpanel ,obviously I will have 3 , #2 copper and a green #4 for the ground . All wires will be in conduit and the subanel will be lass than 5ft. From the main service panel.
I would like to know what is a good panel to use, ( I would like to get one that already has a auxiliary ground bar installed, and if anyone has any other suggestions please feel free to mention them.

Thanks

Hi Roach123, first you will have to make sure you have room in the 200 amp main panel, because you will have to install a 100 amp circuit breaker in that 200 amp panel. Also for a 100 amp panel all you need is 3 #3awg wires an 1 #8awg wire for ground. You will also want to make sure you bond everything together. As far as panels go's Square D , GE, Westinghouse, all are fine. But Most inportance is to check the current draw on you'er 200 amp panel to make sure it can take a new 100 amp subpanel.

Please see NEC code Table 310.15 (B)(6). This will tell you that a #4 AWG is the proper size conductor for a 100 amp feeder.

You will need to run a 4/3 set of conductors.

It is critical to know whether this feeder will supply a sub panel in the same building or an external building.

There is so much information left out of your question that I am curious if you have calculated the load to be handled by the sub panel.

Cutler Hammer, Square D, Siemens or what ever brand is popular in you area. You primary concern is the availability of breakers. Be not concerned about a auxiliary ground buss. They are quite readily available, only two screws to install and most panel come with holes drilled in the correct location for installation.

Why are you running cable in conduit.

How many circuits do you need.
Why not tell us more about what you are doing.

Big-D? You say "bond everything together". Not sure what you mean, but I hope you aren't referring to the neutral and ground conductors. They never share a bond except in the main panel. Please explain your statement for mine and Roach123's better understanding.