Bob,
I read an article in a trade mag that said solid provides a slight energy savings over the life of an electrical system.
How? The amount of copper is the same for solid and stranded and given the skin effect, yes a very small effect at 60 hz, the impedance of stranded should be slightly less.
For us solid does not slow us down, but we use more than the code required size boxes and are used to the solid.
If you haven't tried stranded how do you know?
Don
