Features. Figure 6 Irreversible Grounding Connectors are acceptable for direct burial in earth and concrete. Made of Pure Electrolytic Copper matches or exceeds conductor current carrying capacity. Acceptable for direct burial in earth and concrete. Provides a tap or pigtailtype connection from ground rods to grounding counterpoise or grid. Conductor range 6 through 500 kcmil. Suitable for use on Copperweld or copper clad cable. Ground rod sizes 12 58 and 34Specifications. DepthWidth 88. Height 219