Grounding Box In Attic

In this way the metal raceway acts in place of the grounding wire that is found in nm cable this is also the main reason why only metal boxes may be used with metal conduit.

Grounding box in attic.

Mount the j box to the side of a framing member such as a wall stud ceiling rafter or floor beam using two 8 by 1 inch wood screws. Ground the boom to the coax using a grounding block and at the other end. Ground wire would run down the wall and be connected directly to the ground screw of a new 3 prong outlet that will replace the old 2 prong. Grounding with conduit.

200 amp main service panel on first floor. Neutral and ground bonded at main service panel. Stick to the building code. But first check the electrical plugs of the various devices attached to the tv line.

Also use metal boxes with interior exposed applications. I found that a firm grounding of. Check to ensure that the vent tube is firmly grounded before connecting the wire. 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.

Here are some photos of my roof top antenna with a grounding wire in the attic. Use a metal electrical box when metal sheathed cable also called armored bx cable or metal conduit is running in or out of the box. Metal cable and conduit depend on the contact from its metal sheathing to the metal box to complete grounding. Ctorx aug 23 18 at 23 12.

It doesn t support what you want to do. Run a ground block and grounding wire to the main ground. You should therefore strongly consider grounding your attic mounted antenna by attaching a grounding block to the coaxial cable to shunt off excessive leaked current. 3 wire l l n feeder to 100 amp sub panel in the second floor attic about 25 30 feet from the main service panel.

From the junction box the existing ground goes back to the panel. Note that you do not have to run the ground wire from the antenna you can. In some installations using metal conduit the raceway the conduit boxes and connectors serve as the ground for the circuit. So from junction box directly to outlet.

Grounding a 3 wire sub panel in attic. There are very specific requirements for grounding an antenna both via mast ground and a shield ground. From your description it sounds as if you may create a ground loop which may cause problems throughout the house.