Grounding Box In Attic

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 box in attic.

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. Ctorx aug 23 18 at 23 12. Metal cable and conduit depend on the contact from its metal sheathing to the metal box to complete grounding. Grounding a 3 wire sub panel in attic.

I found that a firm grounding of. Grounding with conduit. Run a ground block and grounding wire to the main ground. There are very specific requirements for grounding an antenna both via mast ground and a shield ground.

Also use metal boxes with interior exposed applications. 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. Check to ensure that the vent tube is firmly grounded before connecting the wire. Neutral and ground bonded at main service panel.

Mount the box in such a way that all the cables entering and. In some installations using metal conduit the raceway the conduit boxes and connectors serve as the ground for the circuit. But first check the electrical plugs of the various devices attached to the tv line. 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.

Run a ground wire from it common ground rod where the electricity enters your. 200 amp main service panel on first floor. Here are some photos of my roof top antenna with a grounding wire in the attic. 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.

From your description it sounds as if you may create a ground loop which may cause problems throughout the house. So from junction box directly to outlet. 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. Neither apply to an antenna in the attic.

Ground the boom to the coax using a grounding block and at the other end. It doesn t support what you want to do. 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.