Yes all outdoor tv antennas should be grounded.
Do attic antennas need to be grounded.
Even if you have a newer plastic antenna there is metal inside.
If it is important should i just tap the coax or is a separate grounding wire needed.
A tv antenna then there is no need for an rf ground.
There is an nec requirement to ground metallic objects in a structure likely to become energized such as metal water pipes appliances gas lines etc.
There is no requirement to do this for indoor antennas.
How important is it to ground them.
The antenna is essentially designed to capture that electricity.
But this wouldn t apply to most attic antennas i would think.
For electrical saftey the antenna should be connected to a lightening arrestor and that connected to ground.
I found that a firm grounding of antenna mast gave a better reception as well.
However the connection of your antenna coax to various ac operated equipment in this case your converter box or tv introduces the potential of electric shock.
Note that the coax is going to be grounded at the receiver anyway.
If it needs grounding it can t go in the attic because code requires that grounded antennae be on the edge of the roof and that the wire from the antenna to the ground follow a straight line path or something like that i m not the electrician.
If it is just for reception e g.
In the case of an attic installation your tv antenna will be sheltered from the environment so there s no need to ground it for that reason.
Will their location in the attic reduce their tendency to build a charge and attract lightning.
Antennas mine are receive only for fm tv and public safety bands will be generally restricted to the attic.
Furthermore tv signals are made of electricity.
I can tell you that as of the 2004 nec and nfpa 101 which covers life safety codes there is no requirement to ground a receive only internal antenna system.
