TerryBarnhill
Member
- Location
- Tyler, Texas
Howdy,
Anyone testing for 25 ohms?
I have been tasked to check several buildings scattered all over several miles around my area for grounding issues. The company has had several insurance claims due to what I was told, "lighting damages from poor service grounding". As it stands, I have not laid eyes on but one of these buildings up to this point. I don't know the age of the buildings, if they are made of steel, sticks, or mud, but would like to have at my disposal the tool for the job when I go.
More than likely, there could be broken conduits, bad circuit grounding, or any number of issues sight unseen. However, I wasn't tasked with doing circuit troubleshooting, but rather to check the services. I would like to show proper grounding at the service to facilitate further investigation as needed. I just don't know if any of the testers can save that kind of data.
I found http://www.extech.com/instruments/product.asp?catid=34&prodid=591 as a three point tester, but have no idea if I have bare earth I can tap into at all the buildings. According to this page, http://ecmweb.com/content/who-cares-about-25-ohms-or-less , clamp on meters aren't always accurate.
Just curious if anyone has been down this road, before.
Anyone testing for 25 ohms?
I have been tasked to check several buildings scattered all over several miles around my area for grounding issues. The company has had several insurance claims due to what I was told, "lighting damages from poor service grounding". As it stands, I have not laid eyes on but one of these buildings up to this point. I don't know the age of the buildings, if they are made of steel, sticks, or mud, but would like to have at my disposal the tool for the job when I go.
More than likely, there could be broken conduits, bad circuit grounding, or any number of issues sight unseen. However, I wasn't tasked with doing circuit troubleshooting, but rather to check the services. I would like to show proper grounding at the service to facilitate further investigation as needed. I just don't know if any of the testers can save that kind of data.
I found http://www.extech.com/instruments/product.asp?catid=34&prodid=591 as a three point tester, but have no idea if I have bare earth I can tap into at all the buildings. According to this page, http://ecmweb.com/content/who-cares-about-25-ohms-or-less , clamp on meters aren't always accurate.
Just curious if anyone has been down this road, before.