Stainless steel can conduct electricity. In fact, most of the metals have the ability to conduct electricity. The ability of stainless steel to conduct electricity varies, according to the level of chromium coating on it. Copper can conduct electricity much better than stainless steel, however, if that is your goal. It is also less expensive than stainless steel as well. It is also easier to solder and clamp copper. Hence, copper is the best choice for conducting electricity.