Update March 6, 2019: The most popular page on my old html site was for conduit dimensions.  Unfortunately due to design incompatibilities ( See Here ) I was forced to start all over and create new conduit pages in the new WordPress site.  Today I posted some brief information describing popular North American electrical conduits.  Pages with conduit dimensions will be forthcoming, though not quickly.  In the meantime, be safe when working with electrical wiring and electricity.