This paper gives an overall view, and outlines the pros and cons of diesel power versus electric power as used in underground rubber tired mining equipment. Emphasis is placed on the specific problems associated with the underground mining environment. The visualization of advantages and disadvantages of both power sources emphasize the need for both diesel and electric power underground. A revolutionary development in mobile electric cable handling is disclosed. This paper will concern itself only with hard rock mining (metallic) versus non-hard rock (non-metallic coal mines).