Sony SAT-A3 - Manual (Page 114)

Appendix
Other Information
The sections covered in this appendix are:
□ National Electrical Code
□ Specifications
□ Limited Warranty
□ Glossary
□ Index
.National Electrical Code
The following portions of the National Electrical Code are provided to assist you with
the installation of your digital satellite antenna. These pages represent only a
portion of the entire National Electrical Code, and should be consulted for reference
purposes only. For the complete code, please refer to the National Electrical Code
Handbook.
250-1. Scope. This article covers general requirements for grounding and bonding
of electrical installations, and specific requirements in (a) through (f) below.
(a) Systems, circuits, and equipment required, permitted,or not permitted to be
grounded.
(b)
Circuit conductor to be grounded on grounded systems.
(c) Location of grounding connections.
(d) Types and sizes of grounding and bonding conductors and electrodes.
(e) Methods of grounding and bonding.
(f) Conditions under which guards, isolation, or insulation may be substituted for
grounding.
250-81. Grounding Etectrode System, if available on the premises at each
building or structure served, each item (a) through (d) below, and any made
electrodes in accordance with Sections 250-83 (c) and (d), shall be bonded together
to form the grounding electrode system. Interior metal water piping located more
than 5 feet (152 cm) from.the point of entrance4o the bwilding shall not be used as a
conductor to interconnect the electrodes and the grounding electrode conductor.
The bonding jumper shall be installed in accordance with Sections 250-92 (a) and
(b), shall be sized in accordance with Section 250-94, and shall be connected in the
manner specified in section 250-115. The unspliced grounding electrode conductor
shall be permitted to run to any convenient grounding electrode available in the
grounding electrode system. It shall be sized for the largest grounding electrode
conductor required among all the available electrodes.
(a) Metal Underground Water Pipe. A metal underground water pipe in direct
contact with the earth for 10 feet (3.05 m) or more (including any metal well casing
effectively bonded to the pipe) and electrically continuous (or made electrically
continuous by bonding around insulating joints or sections or insulating pipe) to the
points of connection of the grounding electrode conductor and the bonding
conductors. Continuity of the grounding path or the bonding connection to Interior
piping shall not rely on water meters. A metal underground water pipe shall be
supplemented by an additional electrode of a type specified in Section 250-81 or In
Section 250-83. The supplemental electrode shall be permitted to be bonded to the
grounding electrode conductor, the grounded service-entrance conductor, the
grounded service raceway, or any grounded service enclosure.
250-63. Made and Other Electrodes. Where none of the electrodes specified in
Section 250-81 is available, one or more of the electrodes specified in (b) through
(d)* below shall be used. Where practicable, made electrodes shall be embedded
below permanent moisture level. Made electrodes shall be free from nonconductive
coatings, such as paint or enamel. Where more than one electrode is used, each
electrode of one grounding system (including that used for lightning rods) shall not
be less than 6 feet (1.83 m) from any other electrode of another grounding system.
(c) Rod and Pipe Electrodes. Rod and pipe electrodes shall not be less than 8
feet (2.44 m) in length and shall consist of the following materials, and shall be
installed in the following manner:
(1) Electrodes of pipe or conduit shall not be smaller than -inch
trade size and, where of iron or steel, shall have the outer surface galvanized or
otherwise metal-coated for corrosion protection.
(2) Electrodes of rods of iron or steel shall be at least Ve inch (15.87 mm) in
diameter.
Stainless steel rods less than Ve inch (15.87 mm) in diameter, nonferrous rods, or
their equivalent shall be listed and shall not be less than '/2 inch (12.7 mm) in
diameter.
(3) The electrode shall be installed such that at least 8 feet (2.44 m) length is
in contact with the soil. It shall be driven to a depth of not less than 8 feet (2.44 m)
except that, where rock bottom is encountered, the electrode shall be driven at an
oblique angle not to exceed 45 degrees from the vertical or shall be buried in a
trench that is at least 2V2 feet (762 mm) deep. The upper end of the electrode shall
be flush with or below ground level unless the above ground end and the grounding
electrode conductor attachment are protected against physical damage as specified
in Section 250-117.
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) or (c) 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.
810-15. 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 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 follows:
(1) To the nearest accessible location on (1) the building or structure grounding
electrode system as covered in Section 250-81, (2) the grounded interior metal water
piping system as covered in Section 250-80(a), (3) the power service accessible
means external to enclosures as covered in Section 250-71 (b), (4) the metalic power
service raceway, (5) the service equipment enclosure, or (6) the grounding electrode
conductor or the grounding electrode conductor metal enclosures; or
(2) If the building or structure served has no grounding means, as described in
(f) (1), to anyone of the individual electrodes described in section 250-81; or
(3) If the building ©restructure served has no grounding means, as described in
(f) (1), or (f) (2), to (1) an effectively grounded metal structure or (2) to any of the
individual electrodes described in Section 250-83.
(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 N 0 .IO copper or No. 8
aluminum or No. 17 copper-clad steel or bronze.
(I) Common Ground. A single grounding conductor shall be permitted for both
protective and operating purposes.
(i) Bonding of Electrodes. Abonding jumper not smaller than No. 6 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.
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