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#5282 - 11/13/01 12:46 PM 20 ft Ground Rod  
JOAN  Offline
Joined: Nov 2001
Posts: 10
Jersey City, New Jersey
Prints I'm looking at call for driving 20 ft ground rod. I'm not sure of the composition of the ground. Anyone have a good (fast, cheap, easy?) way to run same.

Work Gear for Electricians and the Trades

#5283 - 11/13/01 04:46 PM Re: 20 ft Ground Rod  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
Joan, why not try a UFER?

#5284 - 11/13/01 06:07 PM Re: 20 ft Ground Rod  
NJwirenut  Offline
Joined: Sep 2001
Posts: 806
Bergen County, NJ
How about 2 10 foot rods?

[Linked Image]

Or you could lay the 20 foot rod horizontally in a ditch before backfilling.

#5285 - 11/13/01 06:20 PM Re: 20 ft Ground Rod  
George Corron  Offline
Joined: May 2001
Posts: 717
Lorton, Va USA
The ground ring around the Pentagon requires ground rods 1" X 20' every 15 feet, most contractors use an air compressor and jack hammer for the task. BTW, did I tell you guys one of the reasons I've been scarce around here is the move from Dulles to the
Pentagon ? Surprise !!!!!!!

#5286 - 11/13/01 06:56 PM Re: 20 ft Ground Rod  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
good grief! that would take a while...

#5287 - 11/13/01 10:13 PM Re: 20 ft Ground Rod  
resqcapt19  Offline
Joined: Nov 2000
Posts: 2,148
I just had to install some 10" rods in an area with rock at 3'. I had a soil testing company drill 4" holes 11' deep and installed the rods with sand mix concrete as back fill. The drilling cost about $400 per rod.


#5288 - 11/13/01 11:52 PM Re: 20 ft Ground Rod  
George Corron  Offline
Joined: May 2001
Posts: 717
Lorton, Va USA
It takes a bit, but the old building was poorly grounded when built (1941-43) and patched here and there since. This is the first major remodel and lotsa things that were taken for granted years ago will not be overlooked this time. Course, uh.... we also have to fill the hole.

#5289 - 11/13/01 11:57 PM Re: 20 ft Ground Rod  
Nick  Offline
Joined: Aug 2001
Posts: 599
Riverside, CA
Are 20' ground rods readily available or do you have to Cadweld two 10'?

#5290 - 11/14/01 12:12 AM Re: 20 ft Ground Rod  
nesparky  Offline
Joined: Jun 2001
Posts: 642
You can use sectional ground rods to get just about any length. You will need something heavy to drive them-air comressor and jack hammer- depending on the local earth at the job site. Most supply houses will be able to order them for you
Good luck


#5291 - 11/14/01 09:03 AM Re: 20 ft Ground Rod  
electure  Offline

Joined: Dec 2000
Posts: 4,260
Fullerton, CA USA
There's one I had to drive to 140' for a company that produced equipment for MaBell in the '70s. Using 10' sectional rods and a 60# jackhammer, it took all of 2 days in fairly easy dirt.

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