Which do you prefer when doing a new service, going through siding and the wood sheating and sweeping (90º) into the top of the panel, or going through the foundation and into the back of the panel? I prefer the former rather than the latter because drilling through concrete stinks.
I Prefer to go through the foundation and into the back of the panel whenever and wherever I can... Might be more work but I think it makes the panel look " cleaner"..