The coax cable itself can build up a static electric charge and in order to properly dissipate that charge an antenna discharge unit or grounding block can be used again check you local code rules.
Grounding antenna in attic.
Now it s time to ground your tv antenna s coax cable.
The copper wire at the base of the antenna mast attaches to the copper vent tube that runs to the roof through the attic in a 55 year old house.
Grounding a tv antenna isn t just for safety.
From your description it sounds as if you may create a ground loop which may cause problems throughout the house.
An alternative is a pipe clamp which is heavy duty and made of steel with serrated adapters.
Neither apply to an antenna in the attic.
There are very specific requirements for grounding an antenna both via mast ground and a shield ground.
Most people use a galvanized steel ground strap such as this one.
An example is the 90628 ground pipe clamp by morris products.
It might not but there is going to be a whole bunch of electrical wiring in the attic as well for the lightning to follow.
Here are some photos of my roof top antenna with a grounding wire in the attic.
This antenna has all the reception power of an outdoor antenna but features a curved metal frame of reflectors that are designed for fitting easily into smaller attic spaces.
The mounting rod is insulated from any of the active reception parts.
Exterior antennas must have their mounting rod grounded to provide electric discharge in the event of a lightning strike or static accumulation from other causes.
Air movement in your attic should not pose a problem.
Step 4 how to ground your coax cable.
The layer of plywood would tend to block those.
Check to ensure that the vent tube is firmly grounded before connecting the wire.
To bond a grounding wire to the antenna mast you can use either a ground strap or pipe clamp.