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20 ft Ground Rod #5282
11/13/01 11:46 AM
11/13/01 11:46 AM
J
JOAN  Offline OP
Member
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
Re: 20 ft Ground Rod #5283
11/13/01 03:46 PM
11/13/01 03:46 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,342
Joan, why not try a UFER?
http://www.scott-inc.com/html/ufer.htm

Re: 20 ft Ground Rod #5284
11/13/01 05:07 PM
11/13/01 05:07 PM
N
NJwirenut  Offline
Member
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.

Re: 20 ft Ground Rod #5285
11/13/01 05:20 PM
11/13/01 05:20 PM
G
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Joan,
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 !!!!!!!

Re: 20 ft Ground Rod #5286
11/13/01 05:56 PM
11/13/01 05:56 PM
S
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,342
George,
good grief! that would take a while...

Re: 20 ft Ground Rod #5287
11/13/01 09:13 PM
11/13/01 09:13 PM
R
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Joan,
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.
Don(resqcapt19)


Don(resqcapt19)
Re: 20 ft Ground Rod #5288
11/13/01 10:52 PM
11/13/01 10:52 PM
G
George Corron  Offline
Member
Joined: May 2001
Posts: 717
Lorton, Va USA
Sparky,
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.

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

Re: 20 ft Ground Rod #5290
11/13/01 11:12 PM
11/13/01 11:12 PM
N
nesparky  Offline
Member
Joined: Jun 2001
Posts: 642
omaha,ne
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


ed
Re: 20 ft Ground Rod #5291
11/14/01 08:03 AM
11/14/01 08:03 AM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,264
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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