An existing commercial building has a 6 AWG GEC running from one of the two side-by-side service panels to a single ground rod. A radio tower will be re-erected; it has three ground rods which form a triangle; sides of triangle are about 18 inches long. The most nearly applicable article seems to be 810.51 and 801.58. Some of the radios are amateur radios, and the public safety radios are electrically identical to amateur radios. 810.51 leads to 801.15, which leads to 801.21(J), which requires the radio ground to power grounding electrode system to be connected with 6 AWG.
If I run the connection directly between the power and radio ground rod, does that mean that the power GEC is no longer the sole connection to the building ground rod, and thus require the 6 AWG GEC be replaced with a GEC sized according to table 250.66 (in the case of this building, it would be 1/0)? Would it be OK to avoid this size increase by running 6 AWG from the service panel to the radio ground?
If I run the connection directly between the power and radio ground rod, does that mean that the power GEC is no longer the sole connection to the building ground rod, and thus require the 6 AWG GEC be replaced with a GEC sized according to table 250.66 (in the case of this building, it would be 1/0)? Would it be OK to avoid this size increase by running 6 AWG from the service panel to the radio ground?