JVC HM-DSR100U, HM-DSR100DU, HM-DSR100RU manual Grounding, Appendix, National Electrical Code NEC

Appendix	A
National Electrical Code (NEC)

250-115. CONNECTION TO ELECTRODES

The grounding conductor shall be connected to the grounding electrode by exothermic welding, listed lugs, listed pressure connectors, listed clamps, or other listed means. Connections depending on solder shall not be used. Ground clamps shall be listed for the materials of the grounding electrode and the grounding electrode conductor and, where used on pipe, rod, or other buried electrodes, shall also be listed for direct soil burial. Not more than one conductor shall be connected to the grounding electrode by a single clamp or fitting unless the clamp or fitting is listed for multiple conductors. One of the methods indicated in (a), (b), (c), or (d) below shall be used.

(a)Bolted clamp: A listed bolted clamp of cast bronze or brass, or plain or malleable iron.

(b)Pipe Fitting, Pipe Plug, etc.: A pipe fitting, pipe plug, or other approved device screwed into a pipe or pipe fitting.

(c)Sheet-Metal-Strap Type Ground Clamp: A listed sheet-metal-strap type ground clamp having a rigid metal base that seats on the electrode and having a strap of such material and dimensions that it is not likely to stretch during or after installation.

810-15. GROUNDING

Masts and metal structures supporting antennas shall be grounded in accordance with Section 810-21.

810-21. GROUNDING CONDUCTORS - RECEIVING STATIONS

Grounding conductors shall comply with (a) through (j) below.

(a)Material. The grounding conductor shall be of copper, aluminum, copper-clad steel, bronze, or similar corrosion-resistant material.

(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.

(d)Mechanical Protection. The grounding conductor shall be protected where exposed to physical damage, or the size of the grounding conductors shall be increased proportionately to compensate for the lack of protection.

(e)Run in Straight Line. The grounding conductor for an antenna mast or antenna dis- charge unit shall be run in as straight a line as practicable from the mast or discharge unit to the grounding electrode.

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