NOT KNOWN DETAILS ABOUT OVAL CONDUIT

I have never obtained that far yet. I was looking at what was achievable so I am going educated when I look for a spark to work with4. Do distinct makers have oval conduits with distinctive interior Proportions, or are they essentially the same?For 4mm2 T&E, you are able to in good shape two cables inside of a 25mm oval conduit, or one cable in 16m