... We're doing a 300 amp. underground service for a residence,and I know that I need to insert an expansion coupling,..but where?? on the line side schedule 80 pvc,just before the meter,or in the trench,...and do I also need one on the load side before entering the basement through the foundation??
I realize it depends on the length of run and the expected change in ambient temperature, but I'm a little fuzzy on where to place it...(don't be funny, I know what you're about to say..)
Russ
