Fluke Corp.’s 1623-2 and 1625-2 earth ground testers perform all four types of earth ground measurements: three- and four-pole fall-of-potential, four-pole soil resistivity, selective testing, and stakeless testing. They enable electricians to meet electrical codes, engineering standards and local regulations to ensure that in the event of a lightning strike or utility overvoltage current will find a safe path to earth. A ccessories include heavy-duty stakes that can be hammered into hard ground, color-coded wires to reduce errors, and a professional, rugged carrying case.