There are 4 conduits runs coming from the main panel to a junction box 3 are 3/4 plastic the other is 1 1/4 emt. The rest of the wires coming in from kitchen/ rest of the house to the junction box are romex. 8 circuits of 12/2, 2 circuits 14/2, 1 circuit of 10/3 and 1 circuit of 6/3.
In order to make it look clean and code compliant can you attach all the grounds to a grounding bar then run one ground back to ground bar in the panel ?
The largest ground wire to the grounding bar will be 6 gauge from a stove .What size ground wire will be required from the bar to the panel ?