so in my house (built 1955), a wall in the living room does not have a grounded outlet and i need one there so i want to run an extension cord/plug up from the basement. in the basement, above the drop ceilings, there is a long piece of masking tape (ancient and unmarked) that runs right about where i have roughly measured the wall on the floor above it to be.
is it customary to mark the location of a wall of the floor above with tape?
thanks everyone.