chim
Elite Member
We have done many projects over the last 40+ years. Specs for buildings (schools, colleges, offices, etc) usually call for solid copper up to #10, and stranded for larger sizes, and years ago stranded was not even permitted in smaller sizes by some of the engineering firms we worked with. Solid wire up to #10 is neither a code violation nor a big problem if the conduit installation is done in a workmanlike manner. If there's a problem pulling the wires around that 7th 90 degree bend, it's time to rethink the conduit run.
Wiring in industrial applications was normally all stranded, due in part to the flexibility required for some connections as well as the ability of stranded to cope with vibration.
When we bring a new hire on board, it becomes apparent to his fellow workers where he received most of his training through the discussions and questions even if he doesn't say where he worked prior to being hired. If one of the first question he asks is "Howcome you don't use stranded wire?" there's a good chance they worked in a factory. If he ruins a lot of conduit trying to make bends that fit, they probably have a lot of residential experience (or are just inept)
