# electrical math - ground rods

Page 1 of 2
• posted on January 23, 2010, 8:34 pm

Two, eight foot long 5/8" copper clad steel rods - plus - One 1 1/2" Milwaukee rotary hammer drill (no bit) - equals - Five minutes total to drive them both through clay and rock
For the last few inches I put an old 6" long 1/2" drive impact extension in the drill to use as a bit. Worked great.
I can't imagine how cave men drove their ground rods...
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 8:45 pm

ok, now lets see you use the drill to get them out in five minutes....
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 12:45 am

True story helped a old friend widen his driveway, till we hit the ground rod system a couple feet from the house. He reported the electrician was unable to drive rod closer to home, supposedly metal trash buried in area. Quite possible since it a old farm house.
I said no problem we will drive new ground rods just behind house.:)
he inssted he wanted to pull and reuse the ground rods and copper wire. The copper ground wire was aleady beat up from our digging around it:(
So I said you pull the rods, and redrive them then I will help finish the widening.
That was about 3 years ago the job hasnt progressed at all.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 8:48 pm

We use sledge hammers
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 9:04 pm
RBM wrote:

with pipes as handles so we can use them like a post pounder until the top of the rod gets close to the ground.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 4:37 pm

I pounded two ground rods each at 10 feet long according to our Code. We have heavy hard pan clay starting about the 3 foot level. I had a step ladder and a 12 pound sledge. They went down the 3 feet easily, but the last 6 feet was murder (I left 1 foot out the ground as we were backfilling about 3 more feet of fill to get final grade). Out of sheer boredom, as it was taking all day, I measured progress as I counted the hits of the sledge hammer. I was getting about 30 hits per inch or a 1/32 inch per hit. My arms were ready to drop off after spending an entire day just to get two ground rods installed as a had an inspection the next day so that I could get the panel turned on for temporary power. This was 40 years ago, I wish I had heard of using a hammer drill, that is if I could afford one back then.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 10:11 pm
That sounds like a LOT of work. Did you use a grinder, to make a point, on the end of the rod?
--
Christopher A. Young
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 10:29 pm

Didn't need to make a point, the ground rod came with one.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 25, 2010, 12:59 am
EXT wrote:

Wowsers. The worst one I did took me maybe an hour or so. It was in an old fenceline between two fields. I was convinced someone must've buried an old hedge post right where I was driving the ground rod. The last half of the 10' rod went pretty slow.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 9:17 pm

*I have been using a rotary hammer for many years now except that I have ground rod driver bits to go in the rotary hammers. You got lucky with your soil conditions. In some spots I hit shale and it is very slow going in.
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 9:41 pm

Push them in the ground with a backhoe
Jimmie
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 1:59 am

Got a Harbor Freight coupon for one of those?
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 2:30 am
Red Green wrote:
(snip)

Chuckle. Gotta love those coupons. I've got 7 of the little flashlights so far.
-- aem sends...
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 10:09 pm
I've lost count.
Oh, if you put the light in your pocket, turn the battery pack backwards. So that when the button get pushed some how, the batteries don't all go dead. I found mine dead in my pocket, today.
--
Christopher A. Young
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 10:07 pm
http://www.harborfreightusa.com/usa/common/displayPage.do?pageFile=boatus.html
Coupons not usually seen else where.
Including 20% off any backhoe, and one for a free flash light.
--
Christopher A. Young
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 10:08 pm
Limp Arbor wrote:

Through sheer force of will.
Jon
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 10:19 pm
Jon Danniken wrote:

A drive pipe, and young stupid junior employees they wanted to keep busy and out of their hair. (DAMHIKT. BTDT, etc.)
-- aem sends...
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 10:02 pm
Yoda!
--
Christopher A. Young
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 23, 2010, 10:15 pm

Some elections drive them with sledge hammers until they hit a rock. Then cut them off. WW
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
• posted on January 24, 2010, 3:34 am