Well for the most part we do not use those tiny meter sockets. We use meter mains. Those have sufficient pull sections for some slack.
A slab poured 5 years later will not be subject to as much settling as it has already had 5 years to settle, frost heave is still a potential problem though.
One case that I recall where I did have a dirt settling problem - and did have an expansion fitting on the raceway was with a meter main.
It was the fact that the expansion coupling had obviously moved while still working on this new building that caught my attention and got me to looking at things. Conductors were pulled really tight and putting strain on the meter lugs. POCO did not leave any slack at the pole so nothing to give there either. Expansion fitting did save the raceway, but had there been much more settling, or maybe just more time and tension on the lug something would have broke there.
" And all the science I don't understand, it's just my job five days a week "
rbj, Seattle...Safety is a Professional Courtesy.
so i took 2' long pieces of 4" schedule 80, slit them with a track saw,
then spread them with a little porta power i have, and put a piece of
wood in there to hold them open till i could get them started over the
pipe. then you drive them over the pipe till the block of wood gets
note: watch fingers. pinches hurt bunches.
“Give a person a fish and you feed them for a day;
teach that person to use the Internet and they won't bother you for weeks.”