Equpotential bonding

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jwelectric

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There are chemical rods on the market that are filled from the inside. These electrodes take monthly maintenance.

To drive a galvanized rod and add salt around the rod, the rod will be gone in a couple of years.

The link below has some good information on ground rods
http://www.cpccorp.com/deep.htm

You can see that an eight foot rod or even two will not achieve much of an earth ground. At my utility pole Progress Energy drove 30 feet of rod when they changed out the transformer. I watched as they coupled three 10 feet rods.

EDITED TO ADD

This is an old paper that was completed in 1993 but the information in the paper gives a good idea as to how the deeper the rod the better the ground.
It also gives a good idea that two eight foot rods does little.
 
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jadnashua

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Sorry about adding the 'salt' into the mix...if you recall the details, this was for a short-term army exercise in the desert, where it is extremely difficult to get a decent ground. And, it was for improving communications, not for electrical safety issue or power. Let's not mix things up. Salting the ground is an environmental issue, and may not even be very legal today (this was from the 80's). And, as noted, is corrosive. These guys weren't worried about long-term, they were usually only there for at most a month, then pulled up stakes, and left.
 

DonL

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Hello Jim and the group,

You did not open the Salt Can, I did. I Just wanted a experts view about it.

I know it is very corrosive and requires a lot of maintenance as JW was saying, But it does work.

And it is used mainly for communications and lightning protection, like you were saying.

Getting a good ground on the dessert is very hard when you have to keep adding the moisture to the salt mix.

I did not know that it was outlawed. I guess when you are in the sticks you can still use it.

I bet the U.S military still use it, They have no boundary on what they can do.

I am not sure what the environmental issue would be with it, unless you have runoff or something.
In the areas where they have to use it, there is no were for it to run.

Have a good day

DonL
 
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jadnashua

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Where I live, there are sections of roadway where they don't use salt in the winter to protect the wetlands...get enough of it, and few plants will grow there, either. Can get really messy.
 

ballvalve

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With a rod the deeper the better.
In most areas across America using a 8 foot rod will have around 300 ohms but to extend this rod to 30 or more feet will drop the resistance to 30 ohms or less.

To lay one flat 30 inches deep is a waste of time

You mentioned the flat lay in an earlier post as a viable alternative to a driven rod.
 

Jimbo

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I am old school and nothing has changed since the invention of the light bulb, except they outlaw the production of incandescent bulbs in the U.S.A. (No more easy bake ovens, or light bulbs in your oven or fridge)

Light bulbs are an even more complicated topic than lead free faucets! At this time, the main thrust of the ban is "regular" bulbs. 100 watt gone now, 60 watt next year, and 40 watt the year after. (CA is on an accelerated phase out). So-called specialty bulbs, such as appliance bulbs, decorator bulbs like flame tips and globes, etc. are grandfathered for now. For floodlights, 60 watts is the max in regular incandescent, and I think those are going out. Halogen PAR bulbs are the favored replacement, as a halogen about 15 to 20 % less watts will replace the light of a regular incandescent.
They are encouraging of course flourescent or LED equivalents. But LED is not quite on my radar yet. The best floodlight bulb I could find today was a 60 watt equivalent, and it is $60. I can buy 12 halogens for that price, and I am not willing to roll the dice that the LED will really outlast 12 bulbs. Supposed to, but remember they are made in China!!!!!!
 

DonL

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They quit making bulbs in the U.S.A after the announcement that they would be out outlawed here.

And I agree it is yet to be seen , How long the LED's will last, and 1 Dollar a watt is to much for a 40 watt LED type made in China, We could afford to make them here cheaper, If we would quit giving our jobs away.

Pretty soon we can just get some of those Fish, off the coast of California, And hang them up after they start Glowing in the Dark.

DonL
 
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