Installing grounding plates

[Cparish]

I have a job in north jersey in a section 8 housing complex. We have 3 bldgs where we cannot get rods in past a foot or so. Excavator on site is going to help me either lay them horizontally or dig down for the plate. My question is, do I need two plates per service like when installing rods? Or will one suffice? Thanks in advance.

 

[infinity]

A second electrode is required unless tested and proven to be 25Ω or less. {250.53(A)(2)}
New building? No CEE?

 

[Cparish]

A second electrode is required unless tested and proven to be 25Ω or less. {250.53(A)(2)}
New building? No CEE?

Nooo not new. Rehab job.

 

[Cow]

Going along with the OP's question, I also have the same question for a project.

Code calls out 2 square feet of grounding plate surface in contact with the earth, does a 10" x 16" plate count since two sides of it are in contact or does a person need a 12" x 24" plate?

nVent Erico EGGP :: 1/4"x10"x16" Grounding Plate :: PLATT ELECTRIC SUPPLY

Grounding Plate without Connector, Material: Galvanized Steel, Dimensions: 1/4" x 10" x 16"., Cat #: EGGP, Mfr: nVent Erico

www.platt.com

 

[Dennis Alwon]

Going along with the OP's question, I also have the same question for a project.

Code calls out 2 square feet of grounding plate surface in contact with the earth, does a 10" x 16" plate count since two sides of it are in contact or does a person need a 12" x 24" plate?

nVent Erico EGGP :: 1/4"x10"x16" Grounding Plate :: PLATT ELECTRIC SUPPLY

Grounding Plate without Connector, Material: Galvanized Steel, Dimensions: 1/4" x 10" x 16"., Cat #: EGGP, Mfr: nVent Erico

www.platt.com

I don't see anywhere that would allow that. I assume when they say 2 sq. ft they are talking about both sides.

 

[Cow]

I don't see anywhere that would allow that. I assume when they say 2 sq. ft they are talking about both sides.

I don't think the code article as written is very clear cut. I can read it both ways. But, I can be a little dense sometimes....

 

[LarryFine]

Sounds like you're hitting the footing. Did you try a foot away from the building?

 

[don_resqcapt19]

Going along with the OP's question, I also have the same question for a project.

Code calls out 2 square feet of grounding plate surface in contact with the earth, does a 10" x 16" plate count since two sides of it are in contact or does a person need a 12" x 24" plate?

nVent Erico EGGP :: 1/4"x10"x16" Grounding Plate :: PLATT ELECTRIC SUPPLY

Grounding Plate without Connector, Material: Galvanized Steel, Dimensions: 1/4" x 10" x 16"., Cat #: EGGP, Mfr: nVent Erico

www.platt.com

The rule requires 2 square feet in contact with the earth, and both sides of the plate as well as the edges are in contact with the earth. A plate 12" x 12" complies with the code requirement.

 

[synchro]

The rule requires 2 square feet in contact with the earth, and both sides of the plate as well as the edges are in contact with the earth. A plate 12" x 12" complies with the code requirement.

Agree, and here are listed plates that have 1 sq. ft. of area on each side:

Steel Ground Plates | Galvan Electrical | 60 Years in Service

Learn more about Galvan Electrical's Steel Ground Plates. Contact us at 704-455-5102 or email us at sales@galvanelectrical.com.

galvanelectrical.com

 

[GoldDigger]

If the upper side of a horizontally mounted plate was covered in plastic, or deliberately covered with dry sand and rock fill instead of local earth, I could see some inspectors failing it.

 

[Cparish]

Sounds like you're hitting the footing. Did you try a foot away from the building?

Yes. I’ve aerated the lawn lol.

 

[LarryFine]

I have a 36" long 5/8" SDS-Max bit that my Bosch should be able to drive through whatever is in the way.