Originally Posted by speedy petey
Verily, Milord. . .
I did this with an iron and a portable floor heater, for years now.
When the family room TV is on with the overhead floodlights and the iron, the CB would eventually trip. An outlet only 6 more feet away from the ironing board solved the problem.
With a soldered splice and heat shrink tubing there is a negligible decrease in safety and a negligible decrease in the tensile strength of the cord.
Cords for outdoor use and rough handling are a different story.
It's up to the [informed adult] OP to work out the costs/benefits of this option. All OPs know they can get an electrician, so that choice goes without saying.
BTW, if a sudden 10A load drops the voltage at the outlet by 3v, and it's 60' to the panel, his wiring and connections for this outlet are in good shape. Since the 120v varies a bit over time, you need to do this measurement a few times and average the answers.
And you already know the circuit protection is functioning.
The only reservation I would have is that I heard somewhere that the life of Romex is 50 years, but the person who said that could not define how anyone can tell when it has reached this end. Perhaps with a megger?
I don't know the lifetime of whatever wire is in the OPs house.