Ground the clamps securely to keep the cables in place. You can also use an Intersystem bonding termination bar to connect grounding wires without having to uninstall the house grounding wire. The bonding bar allows the installation of multiple grounding wires to the house ground wire without any adverse effects.
You need enough cable to cover the length of two segments to and from the coax grounding block. Two sections of the outdoor antenna must be grounded, these are the mast and the coaxial cable. Grounding the coax, sometimes known as signal grounding is the most detailed of the two procedures. A grounded coax cable shuttles the overflow of static electricity charges to the earth.
In addition, grounding this cable eliminates noise generated by RF from the TV set. This noise interferes with signal reception. Attach the appropriate grounding block at the point where the coaxial cable enters your house. Run the coaxial cable from the antennae to the block. If the cable is too long for the distance, you can shorten it to the appropriate length. The length of cable from the antenna to the grounding block is exposed to all weather elements.
You can, however, weatherproof it using a waterproofing grease. Before you pass the coax cable inside the house, make a loop to prevent rainwater from trickling inside though. Avoid sharp corners when installing the coaxial cable as this affects their performance. Connect the cable securely at the grounding block then check the signal reception on your TV. Make sure you are satisfied with the channels that are broadcasting before you move to the next step.
The grounding wire from the antenna passes through the block and then to the house ground wire. At the house ground wire, join it with the copper wire using the intersystem bonding termination bar adapter. Take the shortest route without sharp turns when you are running the coax wire along the wall. No bends in the coax ensure that the excess voltage from a power surge is transported efficiently to the ground.
If you are using a bolt to attach the wire directly onto the antenna, scrap off any paint or insulation. The copper wire must be in direct contact with the metal of the antenna. Now run the mast grounding wire to the house ground wire and attach it with a clamp or bolt.
Secure it in a different spot from the grounding wire. The only reason for grounding an antenna is safety, and because of that, follow all the grounding instructions to the letter. To do anything casually or uninformed defeats the purpose and could lead to serious property damage or injury. The legal aspect of grounding demands compliance with laws that govern electrical installations. Save my name, email, and website in this browser for the next time I comment. Share Tweet Pin.
It will, however, minimize the chances of a lightning strike. What it Means to Ground an Antenna In the field of electrical installations, to ground an antenna is to establish a connection between the antenna and the literal ground.
House Ground Wire House wire is already pre-installed in your house and is made of a thick piece of copper metal that is connected to a metal rod beneath the earth.
Mast Clamp A mast clamp is used to attach a ground wire to the antenna pole. Coaxial Grounding Block This device is used to ground the coaxial cable of the antenna. Coaxial grounding blocks come in two types: The standard coaxial grounding block This is the most common grounding block used in homes.
Coaxial Lightning Arrestor The coax lightning arrestor is for homes that are at a high risk of a direct lightning strike. Ground Clamps Back to the antenna mast and coax cable grounding wires, run them down and connect both of them to the house ground wire. Ample Coaxial Cable You need enough cable to cover the length of two segments to and from the coax grounding block. How to Ground an Outdoor TV Antenna Two sections of the outdoor antenna must be grounded, these are the mast and the coaxial cable.
Grounding the Antenna Coax A grounded coax cable shuttles the overflow of static electricity charges to the earth. The following steps show how to ground the coaxial cable: Install a Lightning Arrestor or Grounding Block Attach the appropriate grounding block at the point where the coaxial cable enters your house. It is okay to install it on the exterior walls so long as it is sheltered from rain. Secure the Grounding Block to the Wall Grounding blocks are packaged with screws for easy installation on the wall.
This wire becomes the ground for the antenna. Using two screws, attach a ground block 3. Leaving the ground block unattached is not to NEC code. The 17 messenger wire can never follow the service loop as this can create a ground imbalance. Terminate the 17 messenger wire in one of the ground wire ports using the screws on the ground block. Note: The 17 messenger wire now runs from the ground screw on the footplate to the ground block on the wall. Connect a separate piece of 10 solid copper wire to the second ground wire port using the screw on the ground block.
Terminate the 10 solid copper wire to the building ground, according to the Building Ground Requirements described below.
Run the 10 ground wire for the shortest distance possible, as straight as possible, with no 90 degree bends. To secure this ground wire to the building, use a ground screw cable clip:. Note: The distance between the ground block and the building ground must be less than 20 feet. Code requires the straps be the same metal type as the pole.
Scrape away all paint so that metal contacts metal all the way around the pole. Note: When two different metals are in contact in a corrosive environment, one of the metals experiences accelerated galvanic corrosion while the other metal remains galvanically protected.
Eventually this breaks the bond removing all grounding potential. The messenger wire can never follow the service loop as this can create a ground imbalance. Note: If this option is used, the ground wire must be carried in conduit from the pole to the ground block. It may not be left exposed. Use weather-resistant ties to secure the COAX and messenger to the pole. Make sure that there are only soft curves and no degree bends. Do not use a self-tapping screw to bond the 17 ground wire, as this does not follow NEC code.
Note: The 17 messenger wire now runs from the ground strap on the pole to the ground block on the wall. Terminate the 10 solid copper wire to the building ground, according to the Building Ground Location Requirements described below.
An Intersystem Bonding Termination IBT installed by a licensed electrician available to terminate the 10 solid copper wire. Important: If the IBT is available , it is the only option for grounding. All other ground sources would not be to NEC code. Install a Ground Lug on the 6 bare copper wire previously installed between the ground rod and electrical panel.
A technician may not install an electrode; the electrode must be pre-existing and back bonded to the main electrical panel feeding the building. A non-flexible metallic power service raceway. The conduit must be solid. Flexible conduit cannot be used as a grounding point. The ground strap must be of the same metal.
Scrape away all paint so that metal contacts metal all the way around the raceway.
0コメント