Outside antennas must be grounded for safety and reception. Indoor antennas do not need a ground. Some people ground attic antennas when the cable from the TV to the antenna is greater then about 30 feet. The ground will discharge static electricity, if any.
Antenna Restrictions Prohibited
Federal law prohibits restrictions (by governments, community and homeowners' associations, and other entities) that impair the installation, maintenance or use of antennas used to receive video programming. The Federal law allows antennas' to be as high as 12 feet above the roofline (top of the roof).
Obstructions (hills, structures, trees, etc.) can reduce or block signals.
Works best on or near a window.
Avoid pointing through metal backed insulation, duct work, etc.
Must be properly grounded for best reception and safety.
Do not install an outside antenna near overhead utility lines, especially power lines. The power line electromagnetic fields can cause interference or signal reduction, and the lines are dangerous to work around.
Coax and ground cable lengths can be estimated knowing the location of;
Coax Ground Block
Should be close to conduit.
Can be outside or inside.
Electrical Service Ground
outside power meter ground pipe, or
inside electrical panel ground busbar.
(2.) Mast Mounting
Side structure mounts with 2 point / bracket mounting is the preferred method.
Roof mounts must be installed more carefully to prevent water leaks.
18-gauge galvanized steel.
1.25 inch outer diameter.
5 - 6 feet long.
Some mast are designed to connect for extended length.
(3.) Antenna Pointing Angle
Attach, aim and secure the antenna. When using a compass to point an antenna, account for the difference between True and Magnetic north. The National Oceanic and Atmospheric Administration (NOAA) website has detailed information and a calculator for Magnetic Declination. Note that local conditions could effect compass readings. If possible use landmarks to confirm or establish true north.
(4.) Antenna Coax Cable
Connect the coax cable to the antenna,
RG-6 quad-shield coax cable is the industry standard.
Use a rubber weather boot or electrical tape to protect the connection.
Allow for some cable slack by looping the cable around the mast. This is just in case a little extra cable length is needed in the future (repairs, new antenna, etc.).
Tie-wrap the rest of the cable to the mast.
Secure the coax cable to the siding with insulated cable straps.
The antenna cable connects directly to a coax ground block, mounted inside or outside and close to the conduit. See (6.) Grounding below.
(5.) Antenna Ground Wire
Attach a ground clamp to the mast.
The ground clamp should be marked Copper or Cu.
Do not use an aluminum (Al) only clamp.
Connect the ground wire.
AWG 10 (#10) or heavier copper wire (Cu).
Should be continuous, no splice connections.
Run as straight as possible.
Can be bare or insulated.
Run inside or outside.
The ground wire runs through (connects to) the coax ground block and continues to the earth ground (see below).
American Wire Gauge Diameters
AWG - American Wire Gauge
in - inches
mm - millimeters
The National Electrical Code (NEC) specifies using the electrical service ground for the antenna earth ground. The coax cable and ground wire run through a ground block connected to the electrical service ground. Outside grounding can use the power meter ground pipe. Inside grounding can use the electrical service panel ground busbar.
Antenna Installation / Outside Ground
Antenna Installation / Inside Ground
The coax ground block should be close to the conduit.
All outside cable connections should be protected with a rubber weather boot or electrical tape.
Cables entering the conduit should have a drip loop to prevent water from collecting at the conduit.
An antenna mast or cable within 5 feet of a swimming pool must be bonded to the pool bounding grid (ground).
TOOLS & PARTS LIST
Basic tools needed include a ladder and assorted screwdrivers, wrenches, sockets, and maybe a hammer etc. You will also need a wood and/or concrete drill, and appropriate drill bits and screws.