I am moving laundry about 40' from current location. I want to tie in to the existing dryer wiring which is 10 gauge. Can I use 10 gauge wire to run 40' or should I use 8 gauge.
As long as the existing run is under 40' the additional length of 40' will not be a problem. It is however very important to make sure the connections between the old run and the new are tight.