This is my first post in this forum. Thanks in advance for the help. I am doing a home remodel with new addition, requiring seven new electrical circuits. The existing main electrical panel is full, so I am installing an external subpanel behind the main, since there is no room in existing utility room. The wires are all secured to joists in crawl space and I was planning on routing them all through 2 1/2 in. PVC conduit from the crawl space to the subpanel, about two feet horizontal and then four vertical. As I understand though, I cannot run all the wires directly into the subpanel with this conduit, as the wires must be secured, no more than two per knockout, upon entry. So my question is: can I run the 2 1/2 in. conduit into a large junction box below the subpanel and then pairs of the wires through 4 separate short runs of 3/4 in. conduit between the boxes, or will I need to scrap the larger conduit and just run the 4 runs of 3/4 in. the entire way from the crawlspace? Or is there another way that I'm just not considering? I prefer the larger conduit if that's correct, as then I can run additional lines more easily in the future if necessary. Thanks again for any advice!

[left]a little while ago our main house breaker flipped. It’s a 200Amp. We have only had one problem and that was during the snow this year. My bro Dad and husband re routed the house through a 110 outlet allowing my generator to run the 110’s for heat. The first attempt literally blew 10 bulbs at one time on one side of my house. Not good I know. Since then we haven’t had any problems until tonight the main flipped and the left side of it was hot to the touch and to me that side on the handle looks discolored as does the handle u flip on my furnace and stove breakers. The only new anything is an old freezer on my porch that is plugged into an outside receptical that has its own trip the situation when it happened was dryer was running and I was actually running bath water. Two TVs goin ans a few lights that’s it. Any ideas or advice as to what would cause this to happen all of a sudden? Also the house and breaker box all is only 4 yrs old [/left]