I asked on the alt.home.repair group about driving
ground rods. The respondees so far have suggested pouring
water in a little hole at the spot then putting the rod in.
I've seen that suggested other places too. Someone usually says
that using water isn't acceptable. The water aided method makes the
ground rod less effective than one just hammered in.
So, is that true?
If this is a shallow hole with water in it and you are actually
driving the rod, only using the water for lubrication, it is legal.
You can't jet down a hole and drop the rod in it tho.
You have to drive it below grade anyway so that little hole is to give
you room to connect the acorn ;-)
Have you ever had to drive a rod through Perma-frost? We had to use
an oxyacetylene torch to heat the rod. Get the tip red hot, drive it an
inch or two, then pull it out & reheat it. It was below zero, and at an
Army base with a record low ow -69F We used an entire tank of oxygen
before we broke through the ice, and could drive it into the soil below.
This was for the AM radio station's studio, to get rid of all the TV
station's video on the radio studio's substandard ground system. :)
sounds good to me. i use a hammer drill or electric demo hammer (without a
bit) to drive the rod. put the rod right into the chuck (don't tighten the
chuck) and pull the trigger. the weight of the tool puts it right into the
ground. no swinging hammers.
don't try this in the arizona desert...
Not heard of using water in the UK.
Don't know if you have the same SDS drills we use, but we can get
SDS-plus and SDS-max drill bits for inserting earth rods, although
I often find a large hammer is more effective, depending on the
makeup of the ground.
[email address is not usable -- followup in the newsgroup]
On Tue, 07 Apr 2015 19:38:59 -0700, Don Kelly wrote:
SDS is kind of wimpy, I normally use a spline drive rotary hammer set on
hammer. While they make ground rod driving adapters for these, they are
entirely unnecessary, the soft ground rod will not harm the hammer face
at all if the rod is inserted directly into the hammer. This easily
drives rods through the soft shale rock we have here, which is extremely
difficult to hammer a rod into with a 12 pound sledge.
There are many ways of enhancing ground rod effectiveness, some of which
require drilling a hole and backfilling around the rod:
I am not sure if these methods are approved for residential grounding, I
have only seen them used on engineered grounding systems where multiple
rods are used and ground resistance is measured to verify low resistance.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.