I cannot yet do a good box offset. I’ve done it about four times but getting it to come out perfect has not happened. This means I have to tweak the conduit again and again to get everything correct, and you can see the marks I made every time if you look in person.
I’m not saying that I did a poor job on this or if there is anything particularly bad about it. It’s just that a real professional would notice that this was done by an amateur.
You might notice that I ran some Romex inside of conduit and this is not normally done. It’s not necessarily good or bad but it depends on the exact conditions of service.
But as a general practice nobody does this because it’s difficult. It takes more time to do.
I did it because I had some pieces of wire that I wanted to use up. They were perfectly good and because I didn’t need any other wires in the conduit so there was no problem with having enough space.
You can only put so many wires inside the conduit, and it depends not only on the size of the wires and the size of the conduit. It depends also on the type of wire, the temperature of the environment, length of the wire, and the power required.
Your wiring may have insulation qualified for 600 V. You may be able to put nine wires in a conduit running 120v, But maybe only three if they run 400.
These matters can also vary from city to city because of the particular power service provided there. And of course they are different Internationally.