This tester is designed to test in-service grounding and jumpering cable assemblies. Regular periodic use will ensure that jumper assemblies perform as designed for personnel safety. Tester is completely self contained, portable and sets up in seconds. Any standard 120 volt grounded outlet will provide power to the tester. A reference chart is provided for #2, 1/0, 2/0, and 4/0 Str. Cu. cables of specific lengths to determine correct test values. A built in digital meter allows the operator to easily input the correct voltage specified on the refer- reference chart for various sizes and lengths of cable. A built in digital ammeter tells the operator if the assembly is in good working condition.