OK in the first part I covered the importance of the Ground Electrode System. Now it is time to put it in details and I can think of no better way than a drawing. Also included are the NEC Article 810 applicable requirements. So first the supporting NEC 810 requirements: 810.20 Antenna Discharge Units (ADU) (A) Where Required. Each conductor of a lead-in from an outdoor antenna shall be provided with a listed antenna discharge unit. Exception: Where the lead-in conductors are enclosed in a continuous metallic shield that either is grounded with a conductor in accordance with 810.21 or is protected by an antenna discharge unit. (B) Location. Antenna discharge units shall be located outside the building or inside the building between the point of entrance of the lead-in and the radio set or transformers and as near as practicable to the entrance of the conductors to the building. The antenna discharge unit shall not be located near combustible material or in a hazardous (classified) location as defined in Article 500. (C) Grounding. The antenna discharge unit shall be grounded in accordance with 810.21. 810.21 Grounding Conductors. Grounding conductors shall comply with 810.21(A) through (K). (A) Material. The grounding conductor shall be of copper, aluminum, copper-clad steel, bronze, or similar corrosionresistant material. Aluminum or copper-clad aluminum grounding conductors shall not be used where in direct contact with masonry or the earth or where subject to corrosive conditions. Where used outside, aluminum or copper-clad aluminum shall not be installed within 450 mm (18 in.) of the earth. (B) Insulation. Insulation on grounding conductors shall not be required. (C) Supports. The grounding conductors shall be securely fastened in place and shall be permitted to be directly attached to the surface wired over without the use of insulating supports. Exception: Where proper support cannot be provided, the size of the grounding conductors shall be increased proportionately. (D) Mechanical Protection. The grounding conductor shall be protected where exposed to physical damage. Where the grounding conductor is run in a metal raceway, both ends of the raceway shall be bonded to the grounding conductor or to the same terminal or electrode to which the grounding conductor is connected. (E) Run in Straight Line. The grounding conductor for an antenna mast or antenna discharge unit shall be run in as straight a line as practicable from the mast or discharge unit to the grounding electrode. (F) Electrode. The grounding conductor shall be connected as required in (F)(1) through (F)(3). (1) In Buildings or Structures with an Intersystem Bonding Termination. If the building or structure served has an intersystem bonding termination, the grounding conductor shall be connected to the intersystem bonding termination. (2) In Buildings or Structures with Grounding Means. If the building or structure served has no intersystem bonding termination, the grounding conductor shall be connected to the nearest accessible location on the following: (1) The building or structure grounding electrode system as covered in 250.50 (2) The grounded interior metal water piping systems, within 1.52 m (5 ft) from its point of entrance to the building, as covered in 250.52 (3) The power service accessible means external to the building, as covered in 250.94 (4) The metallic power service raceway (5) The service equipment enclosure, or (6) The grounding electrode conductor or the grounding electrode conductor metal enclosures A bonding device intended to provide a termination point for the grounding conductor (intersystem bonding) shall not interfere with the opening of an equipment enclosure. A bonding device shall be mounted on non-removable parts. A bonding device shall not be mounted on a door or cover even if the door or cover is non-removable. (3) In Buildings or Structures Without Intersystem Bonding Termination or Grounding Means. If the building or structure served has no intersystem bonding termination or grounding means, as described in 810.21(F)(1). (1) To any one of the individual electrodes described in 250.52; or (2) If the building or structure served has no grounding means, as described in 810.21(F)(1) or (F)(2), to an effectively grounded metal structure. (G) Inside or Outside Building. The grounding conductor shall be permitted to be run either inside or outside the building. (H) Size. The grounding conductor shall not be smaller than 10 AWG copper, 8 AWG aluminum, or 17 AWG copper-clad steel or bronze. (I) Common Ground. A single grounding conductor shall be permitted for both protective and operating purposes. (J) Bonding of Electrodes. A bonding jumper not smaller than 6 AWG copper or equivalent shall be connected between the radio and television equipment grounding electrode and the power grounding electrode system at the building or structure served where separate electrodes are used. (K) Electrode Connection. Connections to grounding electrodes shall comply with 250.70. Lastly here is NEC 810 shown in a drawing.