Systems and methods for measuring alternating current (AC) voltage of an insulated conductor (e.g., insulated wire) are provided, without requiring a galvanic connection between the conductor and a test electrode or probe. A non-galvanic contact (or “non-contact”) voltage measurement system includes a plurality of conductive sensors which capacitively couple with the insulated conductor. At least one processor receives signals indicative of the voltages at the conductive sensors due to the AC voltage in the insulated conductor, and determines the AC voltage in the insulated conductor based at least in part on the received signals.