No, there is no rule. Run the wire through the crawl space if that is easiest for you.
Thanks for the quick response.No, there is no rule. Run the wire through the crawl space if that is easiest for you.
I like to run conductors out the bottom to get a gravity assisted flow of electrons. It helps cut down on utility costs.
Conductors can exit the panel through any knockout (and you can buy tools that let you make additional knockout size holes in appropriate locations elsewhere in the panel). The principle practical limitation is the allowable bend radius of the conductors, which is sometimes an issue with large conductors used to supply power to a panel or send it from one panel to another.A lot of pictures of panel boxes show the mains at the bottom and all wires going upwards.This is just a question about direction of the wires exiting the panel box in a situation where there are finished walls and ceilings.