Yes. You will be glad you did.
If you put in the main panel, meter box, and weatherhead complete with
wiring, without changing anything else, the power company will simply
switch the grid feed over, or put in a new grid feed if required.
Then, if you put a 60 amp breaker in the new panel, you can feed the
old panel with that until you get ready to do your rewire.
By doing it this way, you will have service interrupted only for
I did my cabin this way, and things went smoothly. Where I live,
was no building inspection or permit requirement, and the only thing
mattered what whether I followed the electric company specifications.
gave me a copy of their requirements when I stopped by their local
If you have to deal with a clipboard-carring dude with a whistle
his neck ( aka building inspector), it gets more tricky. I suggest you
an electrician to do the job for you ,in that case, since they may
the job to be done by a licenses electrician. The parts cost is under
from Home Depot, and it is about 3 hours work, so it shouldn't cost you
more than $1000 in mosst places......
Andy (licensed elec engineer)