Abstract: A voltage testing apparatus for electrical railways is disclosed consisting in one embodiment of a transportable pole-mounted electrical power indicator, electrically conducting wire-engaging means such as a hook attached to one end of the pole and electrically connected to the indicator, and a ground-connecting device such as an electrically conducting magnet also electrically connected to the indicator. An electrical circuit is completed between the cable, the indicator and the rail by placing the hook on an overhead railway cable and attaching the magnet to a roadbed rail. An LED array and voltmeter configuration constituting the indicator illuminate and show whether voltage is present.