Abstract: An electrical medical rail system having a hollow rail which may be subdivided in two or more longitudinal conduits for housing the leads of an electrical supply provides a flexible, high and/or low voltage electrical service for medical applications. The hollow rail has aligned outer grooves extending longitudinally along the top and bottom edges for detachably mounting medical equipment and lighting on the rail. A two component longitudinal housing in which one of the components is a snap-in panel and the other an integrated part of the rail provides a high voltage housing which provide electrical outlets, lighting switches and other high voltage equipment. The electrical components may be detachably mounted on the panel and the rail arrangement quickly altered by changing panels on the high voltage housing.