RCA DRD102RW Installation Manual page 127

128 Appendix C/National Electrical Code
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.
810-1. Scope.
This article covers radio and television receiving equipment and amateur radio transmitting and receiving equipment, but not
equipment and antennas used for coupling carrier current to power line conductors.
810-I$. 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 conducto_ 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.