In just a few seconds, a technician can determine if it's safe to work around areas like: Transformer cases and circuit breaker housings Power ground wires or newly-driven ground rods Mobile homes, metallic siding or metal framing Pedestals, crossboxes or conduit Street light fixtures or electrical machinery. The Voltage Detector is a proven life-saver, with more than 20 years of service in telecommunications outside plant and power utility applications. - Helps protect against accidental electrocution - Is fast and easy to use. Handy as a flashlight - Assists with OSHA compliance