The ST800PGN puts a high magnitude pulse between the neutral/hotleg or hotleg/hotleg for any secondary service(120V,208,277,480V). It cannot be fooled by telephone and cable television bonding often missed by continuous loading devices. 800 Amps.The ST800PGN can perform the following functions: Identify bad conductor(s) from the transformer to the meter base Indicate integrity of neutral conductor to prevent excessive houseground currents Locate both hot legs and neutral at the pedestal and/or transformer blocks. Locate bad connectors on overhead spans Identify de-energized URD Primary cable in a manhole or ditch A 6-month pilot project was conducted at a Major Investor owned Utility where the ST800 was found to save the Utility time and money while improving their Customer Satisfaction Rating.Includes: 800 amp service tester Receiver probe Laser pyrometer Alligator clip cable 10 inch handle Manual Standard bag